first

packages/table/index.js

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+import ElTable from './src/table';
+
+/* istanbul ignore next */
+ElTable.install = function(Vue) {
+  Vue.component(ElTable.name, ElTable);
+};
+
+export default ElTable;

packages/table/src/config.js

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+import { getPropByPath } from 'element-ui/src/utils/util';
+
+export const cellStarts = {
+  default: {
+    order: ''
+  },
+  selection: {
+    width: 48,
+    minWidth: 48,
+    realWidth: 48,
+    order: '',
+    className: 'el-table-column--selection'
+  },
+  expand: {
+    width: 48,
+    minWidth: 48,
+    realWidth: 48,
+    order: ''
+  },
+  index: {
+    width: 48,
+    minWidth: 48,
+    realWidth: 48,
+    order: ''
+  }
+};
+
+// 这些选项不应该被覆盖
+export const cellForced = {
+  selection: {
+    renderHeader: function(h, { store }) {
+      return <el-checkbox
+        disabled={ store.states.data && store.states.data.length === 0 }
+        indeterminate={ store.states.selection.length > 0 && !this.isAllSelected }
+        nativeOn-click={ this.toggleAllSelection }
+        value={ this.isAllSelected } />;
+    },
+    renderCell: function(h, { row, column, store, $index }) {
+      return <el-checkbox
+        nativeOn-click={ (event) => event.stopPropagation() }
+        value={ store.isSelected(row) }
+        disabled={ column.selectable ? !column.selectable.call(null, row, $index) : false }
+        on-input={ () => { store.commit('rowSelectedChanged', row); } } />;
+    },
+    sortable: false,
+    resizable: false
+  },
+  index: {
+    renderHeader: function(h, { column }) {
+      return column.label || '#';
+    },
+    renderCell: function(h, { $index, column }) {
+      let i = $index + 1;
+      const index = column.index;
+
+      if (typeof index === 'number') {
+        i = $index + index;
+      } else if (typeof index === 'function') {
+        i = index($index);
+      }
+
+      return <div>{ i }</div>;
+    },
+    sortable: false
+  },
+  expand: {
+    renderHeader: function(h, { column }) {
+      return column.label || '';
+    },
+    renderCell: function(h, { row, store }) {
+      const classes = ['el-table__expand-icon'];
+      if (store.states.expandRows.indexOf(row) > -1) {
+        classes.push('el-table__expand-icon--expanded');
+      }
+      const callback = function(e) {
+        e.stopPropagation();
+        store.toggleRowExpansion(row);
+      };
+      return (<div class={ classes }
+        on-click={callback}>
+        <i class='el-icon el-icon-arrow-right'></i>
+      </div>);
+    },
+    sortable: false,
+    resizable: false,
+    className: 'el-table__expand-column'
+  }
+};
+
+export function defaultRenderCell(h, { row, column, $index }) {
+  const property = column.property;
+  const value = property && getPropByPath(row, property).v;
+  if (column && column.formatter) {
+    return column.formatter(row, column, value, $index);
+  }
+  return value;
+}
+
+export function treeCellPrefix(h, { row, treeNode, store }) {
+  if (!treeNode) return null;
+  const ele = [];
+  const callback = function(e) {
+    e.stopPropagation();
+    store.loadOrToggle(row);
+  };
+  if (treeNode.indent) {
+    ele.push(<span class="el-table__indent" style={{'padding-left': treeNode.indent + 'px'}}></span>);
+  }
+  if (typeof treeNode.expanded === 'boolean' && !treeNode.noLazyChildren) {
+    const expandClasses = ['el-table__expand-icon', treeNode.expanded ? 'el-table__expand-icon--expanded' : ''];
+    let iconClasses = ['el-icon-arrow-right'];
+    if (treeNode.loading) {
+      iconClasses = ['el-icon-loading'];
+    }
+    ele.push(<div class={ expandClasses }
+      on-click={ callback }>
+      <i class={ iconClasses }></i>
+    </div>);
+  } else {
+    ele.push(<span class="el-table__placeholder"></span>);
+  }
+  return ele;
+}

packages/table/src/dropdown.js

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+import Vue from 'vue';
+var dropdowns = [];
+
+!Vue.prototype.$isServer && document.addEventListener('click', function(event) {
+  dropdowns.forEach(function(dropdown) {
+    var target = event.target;
+    if (!dropdown || !dropdown.$el) return;
+    if (target === dropdown.$el || dropdown.$el.contains(target)) {
+      return;
+    }
+    dropdown.handleOutsideClick && dropdown.handleOutsideClick(event);
+  });
+});
+
+export default {
+  open(instance) {
+    if (instance) {
+      dropdowns.push(instance);
+    }
+  },
+
+  close(instance) {
+    var index = dropdowns.indexOf(instance);
+    if (index !== -1) {
+      dropdowns.splice(instance, 1);
+    }
+  }
+};

packages/table/src/filter-panel.vue

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+<template>
+  <transition name="el-zoom-in-top">
+    <div
+      class="el-table-filter"
+      v-if="multiple"
+      v-clickoutside="handleOutsideClick"
+      v-show="showPopper">
+      <div class="el-table-filter__content">
+        <el-scrollbar wrap-class="el-table-filter__wrap">
+          <el-checkbox-group class="el-table-filter__checkbox-group" v-model="filteredValue">
+            <el-checkbox
+              v-for="filter in filters"
+              :key="filter.value"
+              :label="filter.value">{{ filter.text }}</el-checkbox>
+          </el-checkbox-group>
+        </el-scrollbar>
+      </div>
+      <div class="el-table-filter__bottom">
+        <button @click="handleConfirm"
+          :class="{ 'is-disabled': filteredValue.length === 0 }"
+          :disabled="filteredValue.length === 0">{{ t('el.table.confirmFilter') }}</button>
+        <button @click="handleReset">{{ t('el.table.resetFilter') }}</button>
+      </div>
+    </div>
+    <div
+      class="el-table-filter"
+      v-else
+      v-clickoutside="handleOutsideClick"
+      v-show="showPopper">
+      <ul class="el-table-filter__list">
+        <li class="el-table-filter__list-item"
+            :class="{ 'is-active': filterValue === undefined || filterValue === null }"
+            @click="handleSelect(null)">{{ t('el.table.clearFilter') }}</li>
+        <li class="el-table-filter__list-item"
+            v-for="filter in filters"
+            :label="filter.value"
+            :key="filter.value"
+            :class="{ 'is-active': isActive(filter) }"
+            @click="handleSelect(filter.value)" >{{ filter.text }}</li>
+      </ul>
+    </div>
+  </transition>
+</template>
+
+<script type="text/babel">
+  import Popper from 'element-ui/src/utils/vue-popper';
+  import { PopupManager } from 'element-ui/src/utils/popup';
+  import Locale from 'element-ui/src/mixins/locale';
+  import Clickoutside from 'element-ui/src/utils/clickoutside';
+  import Dropdown from './dropdown';
+  import ElCheckbox from 'element-ui/packages/checkbox';
+  import ElCheckboxGroup from 'element-ui/packages/checkbox-group';
+  import ElScrollbar from 'element-ui/packages/scrollbar';
+
+  export default {
+    name: 'ElTableFilterPanel',
+
+    mixins: [Popper, Locale],
+
+    directives: {
+      Clickoutside
+    },
+
+    components: {
+      ElCheckbox,
+      ElCheckboxGroup,
+      ElScrollbar
+    },
+
+    props: {
+      placement: {
+        type: String,
+        default: 'bottom-end'
+      }
+    },
+
+    methods: {
+      isActive(filter) {
+        return filter.value === this.filterValue;
+      },
+
+      handleOutsideClick() {
+        setTimeout(() => {
+          this.showPopper = false;
+        }, 16);
+      },
+
+      handleConfirm() {
+        this.confirmFilter(this.filteredValue);
+        this.handleOutsideClick();
+      },
+
+      handleReset() {
+        this.filteredValue = [];
+        this.confirmFilter(this.filteredValue);
+        this.handleOutsideClick();
+      },
+
+      handleSelect(filterValue) {
+        this.filterValue = filterValue;
+
+        if ((typeof filterValue !== 'undefined') && (filterValue !== null)) {
+          this.confirmFilter(this.filteredValue);
+        } else {
+          this.confirmFilter([]);
+        }
+
+        this.handleOutsideClick();
+      },
+
+      confirmFilter(filteredValue) {
+        this.table.store.commit('filterChange', {
+          column: this.column,
+          values: filteredValue
+        });
+        this.table.store.updateAllSelected();
+      }
+    },
+
+    data() {
+      return {
+        table: null,
+        cell: null,
+        column: null
+      };
+    },
+
+    computed: {
+      filters() {
+        return this.column && this.column.filters;
+      },
+
+      filterValue: {
+        get() {
+          return (this.column.filteredValue || [])[0];
+        },
+        set(value) {
+          if (this.filteredValue) {
+            if ((typeof value !== 'undefined') && (value !== null)) {
+              this.filteredValue.splice(0, 1, value);
+            } else {
+              this.filteredValue.splice(0, 1);
+            }
+          }
+        }
+      },
+
+      filteredValue: {
+        get() {
+          if (this.column) {
+            return this.column.filteredValue || [];
+          }
+          return [];
+        },
+        set(value) {
+          if (this.column) {
+            this.column.filteredValue = value;
+          }
+        }
+      },
+
+      multiple() {
+        if (this.column) {
+          return this.column.filterMultiple;
+        }
+        return true;
+      }
+    },
+
+    mounted() {
+      this.popperElm = this.$el;
+      this.referenceElm = this.cell;
+      this.table.bodyWrapper.addEventListener('scroll', () => {
+        this.updatePopper();
+      });
+
+      this.$watch('showPopper', (value) => {
+        if (this.column) this.column.filterOpened = value;
+        if (value) {
+          Dropdown.open(this);
+        } else {
+          Dropdown.close(this);
+        }
+      });
+    },
+    watch: {
+      showPopper(val) {
+        if (val === true && parseInt(this.popperJS._popper.style.zIndex, 10) < PopupManager.zIndex) {
+          this.popperJS._popper.style.zIndex = PopupManager.nextZIndex();
+        }
+      }
+    }
+  };
+</script>

packages/table/src/layout-observer.js

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+export default {
+  created() {
+    this.tableLayout.addObserver(this);
+  },
+
+  destroyed() {
+    this.tableLayout.removeObserver(this);
+  },
+
+  computed: {
+    tableLayout() {
+      let layout = this.layout;
+      if (!layout && this.table) {
+        layout = this.table.layout;
+      }
+      if (!layout) {
+        throw new Error('Can not find table layout.');
+      }
+      return layout;
+    }
+  },
+
+  mounted() {
+    this.onColumnsChange(this.tableLayout);
+    this.onScrollableChange(this.tableLayout);
+  },
+
+  updated() {
+    if (this.__updated__) return;
+    this.onColumnsChange(this.tableLayout);
+    this.onScrollableChange(this.tableLayout);
+    this.__updated__ = true;
+  },
+
+  methods: {
+    onColumnsChange(layout) {
+      const cols = this.$el.querySelectorAll('colgroup > col');
+      if (!cols.length) return;
+      const flattenColumns = layout.getFlattenColumns();
+      const columnsMap = {};
+      flattenColumns.forEach((column) => {
+        columnsMap[column.id] = column;
+      });
+      for (let i = 0, j = cols.length; i < j; i++) {
+        const col = cols[i];
+        const name = col.getAttribute('name');
+        const column = columnsMap[name];
+        if (column) {
+          col.setAttribute('width', column.realWidth || column.width);
+        }
+      }
+    },
+
+    onScrollableChange(layout) {
+      const cols = this.$el.querySelectorAll('colgroup > col[name=gutter]');
+      for (let i = 0, j = cols.length; i < j; i++) {
+        const col = cols[i];
+        col.setAttribute('width', layout.scrollY ? layout.gutterWidth : '0');
+      }
+      const ths = this.$el.querySelectorAll('th.gutter');
+      for (let i = 0, j = ths.length; i < j; i++) {
+        const th = ths[i];
+        th.style.width = layout.scrollY ? layout.gutterWidth + 'px' : '0';
+        th.style.display = layout.scrollY ? '' : 'none';
+      }
+    }
+  }
+};

packages/table/src/store/current.js

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+import { arrayFind } from 'element-ui/src/utils/util';
+import { getRowIdentity } from '../util';
+
+export default {
+  data() {
+    return {
+      states: {
+        // 不可响应的，设置 currentRowKey 时，data 不一定存在，也许无法算出正确的 currentRow
+        // 把该值缓存一下，当用户点击修改 currentRow 时，把该值重置为 null
+        _currentRowKey: null,
+        currentRow: null
+      }
+    };
+  },
+
+  methods: {
+    setCurrentRowKey(key) {
+      this.assertRowKey();
+      this.states._currentRowKey = key;
+      this.setCurrentRowByKey(key);
+    },
+
+    restoreCurrentRowKey() {
+      this.states._currentRowKey = null;
+    },
+
+    setCurrentRowByKey(key) {
+      const { states } = this;
+      const { data = [], rowKey } = states;
+      let currentRow = null;
+      if (rowKey) {
+        currentRow = arrayFind(data, item => getRowIdentity(item, rowKey) === key);
+      }
+      states.currentRow = currentRow;
+    },
+
+    updateCurrentRow(currentRow) {
+      const { states, table } = this;
+      const oldCurrentRow = states.currentRow;
+      if (currentRow && currentRow !== oldCurrentRow) {
+        states.currentRow = currentRow;
+        table.$emit('current-change', currentRow, oldCurrentRow);
+        return;
+      }
+      if (!currentRow && oldCurrentRow) {
+        states.currentRow = null;
+        table.$emit('current-change', null, oldCurrentRow);
+      }
+    },
+
+    updateCurrentRowData() {
+      const { states, table } = this;
+      const { rowKey, _currentRowKey } = states;
+      // data 为 null 时，解构时的默认值会被忽略
+      const data = states.data || [];
+      const oldCurrentRow = states.currentRow;
+
+      // 当 currentRow 不在 data 中时尝试更新数据
+      if (data.indexOf(oldCurrentRow) === -1 && oldCurrentRow) {
+        if (rowKey) {
+          const currentRowKey = getRowIdentity(oldCurrentRow, rowKey);
+          this.setCurrentRowByKey(currentRowKey);
+        } else {
+          states.currentRow = null;
+        }
+        if (states.currentRow === null) {
+          table.$emit('current-change', null, oldCurrentRow);
+        }
+      } else if (_currentRowKey) {
+        // 把初始时下设置的 rowKey 转化成 rowData
+        this.setCurrentRowByKey(_currentRowKey);
+        this.restoreCurrentRowKey();
+      }
+    }
+  }
+};

packages/table/src/store/expand.js

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+import { toggleRowStatus, getKeysMap, getRowIdentity } from '../util';
+
+export default {
+  data() {
+    return {
+      states: {
+        defaultExpandAll: false,
+        expandRows: []
+      }
+    };
+  },
+
+  methods: {
+    updateExpandRows() {
+      const { data = [], rowKey, defaultExpandAll, expandRows } = this.states;
+      if (defaultExpandAll) {
+        this.states.expandRows = data.slice();
+      } else if (rowKey) {
+        // TODO：这里的代码可以优化
+        const expandRowsMap = getKeysMap(expandRows, rowKey);
+        this.states.expandRows = data.reduce((prev, row) => {
+          const rowId = getRowIdentity(row, rowKey);
+          const rowInfo = expandRowsMap[rowId];
+          if (rowInfo) {
+            prev.push(row);
+          }
+          return prev;
+        }, []);
+      } else {
+        this.states.expandRows = [];
+      }
+    },
+
+    toggleRowExpansion(row, expanded) {
+      const changed = toggleRowStatus(this.states.expandRows, row, expanded);
+      if (changed) {
+        this.table.$emit('expand-change', row, this.states.expandRows.slice());
+        this.scheduleLayout();
+      }
+    },
+
+    setExpandRowKeys(rowKeys) {
+      this.assertRowKey();
+      // TODO：这里的代码可以优化
+      const { data, rowKey } = this.states;
+      const keysMap = getKeysMap(data, rowKey);
+      this.states.expandRows = rowKeys.reduce((prev, cur) => {
+        const info = keysMap[cur];
+        if (info) {
+          prev.push(info.row);
+        }
+        return prev;
+      }, []);
+    },
+
+    isRowExpanded(row) {
+      const { expandRows = [], rowKey } = this.states;
+      if (rowKey) {
+        const expandMap = getKeysMap(expandRows, rowKey);
+        return !!expandMap[getRowIdentity(row, rowKey)];
+      }
+      return expandRows.indexOf(row) !== -1;
+    }
+  }
+};

packages/table/src/store/helper.js

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+import Store from './index';
+import debounce from 'throttle-debounce/debounce';
+
+export function createStore(table, initialState = {}) {
+  if (!table) {
+    throw new Error('Table is required.');
+  }
+
+  const store = new Store();
+  store.table = table;
+  // fix https://github.com/ElemeFE/element/issues/14075
+  // related pr https://github.com/ElemeFE/element/pull/14146
+  store.toggleAllSelection = debounce(10, store._toggleAllSelection);
+  Object.keys(initialState).forEach(key => {
+    store.states[key] = initialState[key];
+  });
+  return store;
+}
+
+export function mapStates(mapper) {
+  const res = {};
+  Object.keys(mapper).forEach(key => {
+    const value = mapper[key];
+    let fn;
+    if (typeof value === 'string') {
+      fn = function() {
+        return this.store.states[value];
+      };
+    } else if (typeof value === 'function') {
+      fn = function() {
+        return value.call(this, this.store.states);
+      };
+    } else {
+      console.error('invalid value type');
+    }
+    if (fn) {
+      res[key] = fn;
+    }
+  });
+  return res;
+};

packages/table/src/store/index.js

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+import Vue from 'vue';
+import Watcher from './watcher';
+import { arrayFind } from 'element-ui/src/utils/util';
+
+Watcher.prototype.mutations = {
+  setData(states, data) {
+    const dataInstanceChanged = states._data !== data;
+    states._data = data;
+
+    this.execQuery();
+    // 数据变化，更新部分数据。
+    // 没有使用 computed，而是手动更新部分数据 https://github.com/vuejs/vue/issues/6660#issuecomment-331417140
+    this.updateCurrentRowData();
+    this.updateExpandRows();
+    if (states.reserveSelection) {
+      this.assertRowKey();
+      this.updateSelectionByRowKey();
+    } else {
+      if (dataInstanceChanged) {
+        this.clearSelection();
+      } else {
+        this.cleanSelection();
+      }
+    }
+    this.updateAllSelected();
+
+    this.updateTableScrollY();
+  },
+
+  insertColumn(states, column, index, parent) {
+    let array = states._columns;
+    if (parent) {
+      array = parent.children;
+      if (!array) array = parent.children = [];
+    }
+
+    if (typeof index !== 'undefined') {
+      array.splice(index, 0, column);
+    } else {
+      array.push(column);
+    }
+
+    if (column.type === 'selection') {
+      states.selectable = column.selectable;
+      states.reserveSelection = column.reserveSelection;
+    }
+
+    if (this.table.$ready) {
+      this.updateColumns(); // hack for dynamics insert column
+      this.scheduleLayout();
+    }
+  },
+
+  removeColumn(states, column, parent) {
+    let array = states._columns;
+    if (parent) {
+      array = parent.children;
+      if (!array) array = parent.children = [];
+    }
+    if (array) {
+      array.splice(array.indexOf(column), 1);
+    }
+
+    if (this.table.$ready) {
+      this.updateColumns(); // hack for dynamics remove column
+      this.scheduleLayout();
+    }
+  },
+
+  sort(states, options) {
+    const { prop, order, init } = options;
+    if (prop) {
+      const column = arrayFind(states.columns, column => column.property === prop);
+      if (column) {
+        column.order = order;
+        this.updateSort(column, prop, order);
+        this.commit('changeSortCondition', { init });
+      }
+    }
+  },
+
+  changeSortCondition(states, options) {
+    // 修复 pr https://github.com/ElemeFE/element/pull/15012 导致的 bug
+    const { sortingColumn: column, sortProp: prop, sortOrder: order } = states;
+    if (order === null) {
+      states.sortingColumn = null;
+      states.sortProp = null;
+    }
+    const ingore = { filter: true };
+    this.execQuery(ingore);
+
+    if (!options || !(options.silent || options.init)) {
+      this.table.$emit('sort-change', {
+        column,
+        prop,
+        order
+      });
+    }
+
+    this.updateTableScrollY();
+  },
+
+  filterChange(states, options) {
+    let { column, values, silent } = options;
+    const newFilters = this.updateFilters(column, values);
+
+    this.execQuery();
+
+    if (!silent) {
+      this.table.$emit('filter-change', newFilters);
+    }
+
+    this.updateTableScrollY();
+  },
+
+  toggleAllSelection() {
+    this.toggleAllSelection();
+  },
+
+  rowSelectedChanged(states, row) {
+    this.toggleRowSelection(row);
+    this.updateAllSelected();
+  },
+
+  setHoverRow(states, row) {
+    states.hoverRow = row;
+  },
+
+  setCurrentRow(states, row) {
+    this.updateCurrentRow(row);
+  }
+};
+
+Watcher.prototype.commit = function(name, ...args) {
+  const mutations = this.mutations;
+  if (mutations[name]) {
+    mutations[name].apply(this, [this.states].concat(args));
+  } else {
+    throw new Error(`Action not found: ${name}`);
+  }
+};
+
+Watcher.prototype.updateTableScrollY = function() {
+  Vue.nextTick(this.table.updateScrollY);
+};
+
+export default Watcher;

packages/table/src/store/tree.js

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+import { walkTreeNode, getRowIdentity } from '../util';
+
+export default {
+  data() {
+    return {
+      states: {
+        // defaultExpandAll 存在于 expand.js 中，这里不重复添加
+        // 在展开行中，expandRowKeys 会被转化成 expandRows，expandRowKeys 这个属性只是记录了 TreeTable 行的展开
+        // TODO: 拆分为独立的 TreeTable，统一用法
+        expandRowKeys: [],
+        treeData: {},
+        indent: 16,
+        lazy: false,
+        lazyTreeNodeMap: {},
+        lazyColumnIdentifier: 'hasChildren',
+        childrenColumnName: 'children'
+      }
+    };
+  },
+
+  computed: {
+    // 嵌入型的数据，watch 无法是检测到变化 https://github.com/ElemeFE/element/issues/14998
+    // TODO: 使用 computed 解决该问题，是否会造成性能问题？
+    // @return { id: { level, children } }
+    normalizedData() {
+      if (!this.states.rowKey) return {};
+      const data = this.states.data || [];
+      return this.normalize(data);
+    },
+    // @return { id: { children } }
+    // 针对懒加载的情形，不处理嵌套数据
+    normalizedLazyNode() {
+      const { rowKey, lazyTreeNodeMap, lazyColumnIdentifier } = this.states;
+      const keys = Object.keys(lazyTreeNodeMap);
+      const res = {};
+      if (!keys.length) return res;
+      keys.forEach(key => {
+        if (lazyTreeNodeMap[key].length) {
+          const item = { children: [] };
+          lazyTreeNodeMap[key].forEach(row => {
+            const currentRowKey = getRowIdentity(row, rowKey);
+            item.children.push(currentRowKey);
+            if (row[lazyColumnIdentifier] && !res[currentRowKey]) {
+              res[currentRowKey] = { children: [] };
+            }
+          });
+          res[key] = item;
+        }
+      });
+      return res;
+    }
+  },
+
+  watch: {
+    normalizedData: 'updateTreeData',
+    normalizedLazyNode: 'updateTreeData'
+  },
+
+  methods: {
+    normalize(data) {
+      const {
+        childrenColumnName,
+        lazyColumnIdentifier,
+        rowKey,
+        lazy
+      } = this.states;
+      const res = {};
+      walkTreeNode(
+        data,
+        (parent, children, level) => {
+          const parentId = getRowIdentity(parent, rowKey);
+          if (Array.isArray(children)) {
+            res[parentId] = {
+              children: children.map(row => getRowIdentity(row, rowKey)),
+              level
+            };
+          } else if (lazy) {
+            // 当 children 不存在且 lazy 为 true，该节点即为懒加载的节点
+            res[parentId] = {
+              children: [],
+              lazy: true,
+              level
+            };
+          }
+        },
+        childrenColumnName,
+        lazyColumnIdentifier
+      );
+      return res;
+    },
+
+    updateTreeData() {
+      const nested = this.normalizedData;
+      const normalizedLazyNode = this.normalizedLazyNode;
+      const keys = Object.keys(nested);
+      const newTreeData = {};
+      if (keys.length) {
+        const {
+          treeData: oldTreeData,
+          defaultExpandAll,
+          expandRowKeys,
+          lazy
+        } = this.states;
+        const rootLazyRowKeys = [];
+        const getExpanded = (oldValue, key) => {
+          const included =
+            defaultExpandAll ||
+            (expandRowKeys && expandRowKeys.indexOf(key) !== -1);
+          return !!((oldValue && oldValue.expanded) || included);
+        };
+        // 合并 expanded 与 display，确保数据刷新后，状态不变
+        keys.forEach(key => {
+          const oldValue = oldTreeData[key];
+          const newValue = { ...nested[key] };
+          newValue.expanded = getExpanded(oldValue, key);
+          if (newValue.lazy) {
+            const { loaded = false, loading = false } = oldValue || {};
+            newValue.loaded = !!loaded;
+            newValue.loading = !!loading;
+            rootLazyRowKeys.push(key);
+          }
+          newTreeData[key] = newValue;
+        });
+        // 根据懒加载数据更新 treeData
+        const lazyKeys = Object.keys(normalizedLazyNode);
+        if (lazy && lazyKeys.length && rootLazyRowKeys.length) {
+          lazyKeys.forEach(key => {
+            const oldValue = oldTreeData[key];
+            const lazyNodeChildren = normalizedLazyNode[key].children;
+            if (rootLazyRowKeys.indexOf(key) !== -1) {
+              // 懒加载的 root 节点，更新一下原有的数据，原来的 children 一定是空数组
+              if (newTreeData[key].children.length !== 0) {
+                throw new Error('[ElTable]children must be an empty array.');
+              }
+              newTreeData[key].children = lazyNodeChildren;
+            } else {
+              const { loaded = false, loading = false } = oldValue || {};
+              newTreeData[key] = {
+                lazy: true,
+                loaded: !!loaded,
+                loading: !!loading,
+                expanded: getExpanded(oldValue, key),
+                children: lazyNodeChildren,
+                level: ''
+              };
+            }
+          });
+        }
+      }
+      this.states.treeData = newTreeData;
+      this.updateTableScrollY();
+    },
+
+    updateTreeExpandKeys(value) {
+      this.states.expandRowKeys = value;
+      this.updateTreeData();
+    },
+
+    toggleTreeExpansion(row, expanded) {
+      this.assertRowKey();
+
+      const { rowKey, treeData } = this.states;
+      const id = getRowIdentity(row, rowKey);
+      const data = id && treeData[id];
+      if (id && data && ('expanded' in data)) {
+        const oldExpanded = data.expanded;
+        expanded = typeof expanded === 'undefined' ? !data.expanded : expanded;
+        treeData[id].expanded = expanded;
+        if (oldExpanded !== expanded) {
+          this.table.$emit('expand-change', row, expanded);
+        }
+        this.updateTableScrollY();
+      }
+    },
+
+    loadOrToggle(row) {
+      this.assertRowKey();
+      const { lazy, treeData, rowKey } = this.states;
+      const id = getRowIdentity(row, rowKey);
+      const data = treeData[id];
+      if (lazy && data && 'loaded' in data && !data.loaded) {
+        this.loadData(row, id, data);
+      } else {
+        this.toggleTreeExpansion(row);
+      }
+    },
+
+    loadData(row, key, treeNode) {
+      const { load } = this.table;
+      const { lazyTreeNodeMap, treeData } = this.states;
+      if (load && !treeData[key].loaded) {
+        treeData[key].loading = true;
+        load(row, treeNode, data => {
+          if (!Array.isArray(data)) {
+            throw new Error('[ElTable] data must be an array');
+          }
+          treeData[key].loading = false;
+          treeData[key].loaded = true;
+          treeData[key].expanded = true;
+          if (data.length) {
+            this.$set(lazyTreeNodeMap, key, data);
+          }
+          this.table.$emit('expand-change', row, true);
+        });
+      }
+    }
+  }
+};

packages/table/src/store/watcher.js

@@ -0,0 +1,381 @@
+import Vue from 'vue';
+import merge from 'element-ui/src/utils/merge';
+import { getKeysMap, getRowIdentity, getColumnById, getColumnByKey, orderBy, toggleRowStatus } from '../util';
+import expand from './expand';
+import current from './current';
+import tree from './tree';
+
+const sortData = (data, states) => {
+  const sortingColumn = states.sortingColumn;
+  if (!sortingColumn || typeof sortingColumn.sortable === 'string') {
+    return data;
+  }
+  return orderBy(data, states.sortProp, states.sortOrder, sortingColumn.sortMethod, sortingColumn.sortBy);
+};
+
+const doFlattenColumns = (columns) => {
+  const result = [];
+  columns.forEach((column) => {
+    if (column.children) {
+      result.push.apply(result, doFlattenColumns(column.children));
+    } else {
+      result.push(column);
+    }
+  });
+  return result;
+};
+
+export default Vue.extend({
+  data() {
+    return {
+      states: {
+        // 3.0 版本后要求必须设置该属性
+        rowKey: null,
+
+        // 渲染的数据来源，是对 table 中的 data 过滤排序后的结果
+        data: [],
+
+        // 是否包含固定列
+        isComplex: false,
+
+        // 列
+        _columns: [], // 不可响应的
+        originColumns: [],
+        columns: [],
+        fixedColumns: [],
+        rightFixedColumns: [],
+        leafColumns: [],
+        fixedLeafColumns: [],
+        rightFixedLeafColumns: [],
+        leafColumnsLength: 0,
+        fixedLeafColumnsLength: 0,
+        rightFixedLeafColumnsLength: 0,
+
+        // 选择
+        isAllSelected: false,
+        selection: [],
+        reserveSelection: false,
+        selectOnIndeterminate: false,
+        selectable: null,
+
+        // 过滤
+        filters: {}, // 不可响应的
+        filteredData: null,
+
+        // 排序
+        sortingColumn: null,
+        sortProp: null,
+        sortOrder: null,
+
+        hoverRow: null
+      }
+    };
+  },
+
+  mixins: [expand, current, tree],
+
+  methods: {
+    // 检查 rowKey 是否存在
+    assertRowKey() {
+      const rowKey = this.states.rowKey;
+      if (!rowKey) throw new Error('[ElTable] prop row-key is required');
+    },
+
+    // 更新列
+    updateColumns() {
+      const states = this.states;
+      const _columns = states._columns || [];
+      states.fixedColumns = _columns.filter((column) => column.fixed === true || column.fixed === 'left');
+      states.rightFixedColumns = _columns.filter((column) => column.fixed === 'right');
+
+      if (states.fixedColumns.length > 0 && _columns[0] && _columns[0].type === 'selection' && !_columns[0].fixed) {
+        _columns[0].fixed = true;
+        states.fixedColumns.unshift(_columns[0]);
+      }
+
+      const notFixedColumns = _columns.filter(column => !column.fixed);
+      states.originColumns = [].concat(states.fixedColumns).concat(notFixedColumns).concat(states.rightFixedColumns);
+
+      const leafColumns = doFlattenColumns(notFixedColumns);
+      const fixedLeafColumns = doFlattenColumns(states.fixedColumns);
+      const rightFixedLeafColumns = doFlattenColumns(states.rightFixedColumns);
+
+      states.leafColumnsLength = leafColumns.length;
+      states.fixedLeafColumnsLength = fixedLeafColumns.length;
+      states.rightFixedLeafColumnsLength = rightFixedLeafColumns.length;
+
+      states.columns = [].concat(fixedLeafColumns).concat(leafColumns).concat(rightFixedLeafColumns);
+      states.isComplex = states.fixedColumns.length > 0 || states.rightFixedColumns.length > 0;
+    },
+
+    // 更新 DOM
+    scheduleLayout(needUpdateColumns) {
+      if (needUpdateColumns) {
+        this.updateColumns();
+      }
+      this.table.debouncedUpdateLayout();
+    },
+
+    // 选择
+    isSelected(row) {
+      const { selection = [] } = this.states;
+      return selection.indexOf(row) > -1;
+    },
+
+    clearSelection() {
+      const states = this.states;
+      states.isAllSelected = false;
+      const oldSelection = states.selection;
+      if (oldSelection.length) {
+        states.selection = [];
+        this.table.$emit('selection-change', []);
+      }
+    },
+
+    cleanSelection() {
+      const states = this.states;
+      const { data, rowKey, selection } = states;
+      let deleted;
+      if (rowKey) {
+        deleted = [];
+        const selectedMap = getKeysMap(selection, rowKey);
+        const dataMap = getKeysMap(data, rowKey);
+        for (let key in selectedMap) {
+          if (selectedMap.hasOwnProperty(key) && !dataMap[key]) {
+            deleted.push(selectedMap[key].row);
+          }
+        }
+      } else {
+        deleted = selection.filter(item => data.indexOf(item) === -1);
+      }
+      if (deleted.length) {
+        const newSelection = selection.filter(item => deleted.indexOf(item) === -1);
+        states.selection = newSelection;
+        this.table.$emit('selection-change', newSelection.slice());
+      }
+    },
+
+    toggleRowSelection(row, selected, emitChange = true) {
+      const changed = toggleRowStatus(this.states.selection, row, selected);
+      if (changed) {
+        const newSelection = (this.states.selection || []).slice();
+        // 调用 API 修改选中值，不触发 select 事件
+        if (emitChange) {
+          this.table.$emit('select', newSelection, row);
+        }
+        this.table.$emit('selection-change', newSelection);
+      }
+    },
+
+    _toggleAllSelection() {
+      const states = this.states;
+      const { data = [], selection } = states;
+      // when only some rows are selected (but not all), select or deselect all of them
+      // depending on the value of selectOnIndeterminate
+      const value = states.selectOnIndeterminate
+        ? !states.isAllSelected
+        : !(states.isAllSelected || selection.length);
+      states.isAllSelected = value;
+
+      let selectionChanged = false;
+      data.forEach((row, index) => {
+        if (states.selectable) {
+          if (states.selectable.call(null, row, index) && toggleRowStatus(selection, row, value)) {
+            selectionChanged = true;
+          }
+        } else {
+          if (toggleRowStatus(selection, row, value)) {
+            selectionChanged = true;
+          }
+        }
+      });
+
+      if (selectionChanged) {
+        this.table.$emit('selection-change', selection ? selection.slice() : []);
+      }
+      this.table.$emit('select-all', selection);
+    },
+
+    updateSelectionByRowKey() {
+      const states = this.states;
+      const { selection, rowKey, data } = states;
+      const selectedMap = getKeysMap(selection, rowKey);
+      data.forEach(row => {
+        const rowId = getRowIdentity(row, rowKey);
+        const rowInfo = selectedMap[rowId];
+        if (rowInfo) {
+          selection[rowInfo.index] = row;
+        }
+      });
+    },
+
+    updateAllSelected() {
+      const states = this.states;
+      const { selection, rowKey, selectable } = states;
+      // data 为 null 时，解构时的默认值会被忽略
+      const data = states.data || [];
+      if (data.length === 0) {
+        states.isAllSelected = false;
+        return;
+      }
+
+      let selectedMap;
+      if (rowKey) {
+        selectedMap = getKeysMap(selection, rowKey);
+      }
+      const isSelected = function(row) {
+        if (selectedMap) {
+          return !!selectedMap[getRowIdentity(row, rowKey)];
+        } else {
+          return selection.indexOf(row) !== -1;
+        }
+      };
+      let isAllSelected = true;
+      let selectedCount = 0;
+      for (let i = 0, j = data.length; i < j; i++) {
+        const item = data[i];
+        const isRowSelectable = selectable && selectable.call(null, item, i);
+        if (!isSelected(item)) {
+          if (!selectable || isRowSelectable) {
+            isAllSelected = false;
+            break;
+          }
+        } else {
+          selectedCount++;
+        }
+      }
+
+      if (selectedCount === 0) isAllSelected = false;
+      states.isAllSelected = isAllSelected;
+    },
+
+    // 过滤与排序
+    updateFilters(columns, values) {
+      if (!Array.isArray(columns)) {
+        columns = [columns];
+      }
+      const states = this.states;
+      const filters = {};
+      columns.forEach(col => {
+        states.filters[col.id] = values;
+        filters[col.columnKey || col.id] = values;
+      });
+
+      return filters;
+    },
+
+    updateSort(column, prop, order) {
+      if (this.states.sortingColumn && this.states.sortingColumn !== column) {
+        this.states.sortingColumn.order = null;
+      }
+      this.states.sortingColumn = column;
+      this.states.sortProp = prop;
+      this.states.sortOrder = order;
+    },
+
+    execFilter() {
+      const states = this.states;
+      const { _data, filters } = states;
+      let data = _data;
+
+      Object.keys(filters).forEach((columnId) => {
+        const values = states.filters[columnId];
+        if (!values || values.length === 0) return;
+        const column = getColumnById(this.states, columnId);
+        if (column && column.filterMethod) {
+          data = data.filter((row) => {
+            return values.some(value => column.filterMethod.call(null, value, row, column));
+          });
+        }
+      });
+
+      states.filteredData = data;
+    },
+
+    execSort() {
+      const states = this.states;
+      states.data = sortData(states.filteredData, states);
+    },
+
+    // 根据 filters 与 sort 去过滤 data
+    execQuery(ignore) {
+      if (!(ignore && ignore.filter)) {
+        this.execFilter();
+      }
+      this.execSort();
+    },
+
+    clearFilter(columnKeys) {
+      const states = this.states;
+      const { tableHeader, fixedTableHeader, rightFixedTableHeader } = this.table.$refs;
+
+      let panels = {};
+      if (tableHeader) panels = merge(panels, tableHeader.filterPanels);
+      if (fixedTableHeader) panels = merge(panels, fixedTableHeader.filterPanels);
+      if (rightFixedTableHeader) panels = merge(panels, rightFixedTableHeader.filterPanels);
+
+      const keys = Object.keys(panels);
+      if (!keys.length) return;
+
+      if (typeof columnKeys === 'string') {
+        columnKeys = [columnKeys];
+      }
+
+      if (Array.isArray(columnKeys)) {
+        const columns = columnKeys.map(key => getColumnByKey(states, key));
+        keys.forEach(key => {
+          const column = columns.find(col => col.id === key);
+          if (column) {
+            // TODO: 优化这里的代码
+            panels[key].filteredValue = [];
+          }
+        });
+        this.commit('filterChange', {
+          column: columns,
+          values: [],
+          silent: true,
+          multi: true
+        });
+      } else {
+        keys.forEach(key => {
+          // TODO: 优化这里的代码
+          panels[key].filteredValue = [];
+        });
+
+        states.filters = {};
+        this.commit('filterChange', {
+          column: {},
+          values: [],
+          silent: true
+        });
+      }
+    },
+
+    clearSort() {
+      const states = this.states;
+      if (!states.sortingColumn) return;
+
+      this.updateSort(null, null, null);
+      this.commit('changeSortCondition', {
+        silent: true
+      });
+    },
+
+    // 适配层，expand-row-keys 在 Expand 与 TreeTable 中都有使用
+    setExpandRowKeysAdapter(val) {
+      // 这里会触发额外的计算，但为了兼容性，暂时这么做
+      this.setExpandRowKeys(val);
+      this.updateTreeExpandKeys(val);
+    },
+
+    // 展开行与 TreeTable 都要使用
+    toggleRowExpansionAdapter(row, expanded) {
+      const hasExpandColumn = this.states.columns.some(({ type }) => type === 'expand');
+      if (hasExpandColumn) {
+        this.toggleRowExpansion(row, expanded);
+      } else {
+        this.toggleTreeExpansion(row, expanded);
+      }
+    }
+  }
+});

packages/table/src/table-body.js

@@ -0,0 +1,483 @@
+import { arrayFindIndex } from 'element-ui/src/utils/util';
+import { getCell, getColumnByCell, getRowIdentity } from './util';
+import { getStyle, hasClass, removeClass, addClass } from 'element-ui/src/utils/dom';
+import ElCheckbox from 'element-ui/packages/checkbox';
+import ElTooltip from 'element-ui/packages/tooltip';
+import debounce from 'throttle-debounce/debounce';
+import LayoutObserver from './layout-observer';
+import { mapStates } from './store/helper';
+
+export default {
+  name: 'ElTableBody',
+
+  mixins: [LayoutObserver],
+
+  components: {
+    ElCheckbox,
+    ElTooltip
+  },
+
+  props: {
+    store: {
+      required: true
+    },
+    stripe: Boolean,
+    context: {},
+    rowClassName: [String, Function],
+    rowStyle: [Object, Function],
+    fixed: String,
+    highlight: Boolean
+  },
+
+  render(h) {
+    const data = this.data || [];
+    return (
+      <table
+        class="el-table__body"
+        cellspacing="0"
+        cellpadding="0"
+        border="0">
+        <colgroup>
+          {
+            this.columns.map(column => <col name={ column.id } key={column.id} />)
+          }
+        </colgroup>
+        <tbody>
+          {
+            data.reduce((acc, row) => {
+              return acc.concat(this.wrappedRowRender(row, acc.length));
+            }, [])
+          }
+          <el-tooltip effect={ this.table.tooltipEffect } placement="top" ref="tooltip" content={ this.tooltipContent }></el-tooltip>
+        </tbody>
+      </table>
+    );
+  },
+
+  computed: {
+    table() {
+      return this.$parent;
+    },
+
+    ...mapStates({
+      data: 'data',
+      columns: 'columns',
+      treeIndent: 'indent',
+      leftFixedLeafCount: 'fixedLeafColumnsLength',
+      rightFixedLeafCount: 'rightFixedLeafColumnsLength',
+      columnsCount: states => states.columns.length,
+      leftFixedCount: states => states.fixedColumns.length,
+      rightFixedCount: states => states.rightFixedColumns.length,
+      hasExpandColumn: states => states.columns.some(({ type }) => type === 'expand')
+    }),
+
+    firstDefaultColumnIndex() {
+      return arrayFindIndex(this.columns, ({ type }) => type === 'default');
+    }
+  },
+
+  watch: {
+    // don't trigger getter of currentRow in getCellClass. see https://jsfiddle.net/oe2b4hqt/
+    // update DOM manually. see https://github.com/ElemeFE/element/pull/13954/files#diff-9b450c00d0a9dec0ffad5a3176972e40
+    'store.states.hoverRow'(newVal, oldVal) {
+      if (!this.store.states.isComplex || this.$isServer) return;
+      let raf = window.requestAnimationFrame;
+      if (!raf) {
+        raf = (fn) => setTimeout(fn, 16);
+      }
+      raf(() => {
+        const rows = this.$el.querySelectorAll('.el-table__row');
+        const oldRow = rows[oldVal];
+        const newRow = rows[newVal];
+        if (oldRow) {
+          removeClass(oldRow, 'hover-row');
+        }
+        if (newRow) {
+          addClass(newRow, 'hover-row');
+        }
+      });
+    }
+  },
+
+  data() {
+    return {
+      tooltipContent: ''
+    };
+  },
+
+  created() {
+    this.activateTooltip = debounce(50, tooltip => tooltip.handleShowPopper());
+  },
+
+  methods: {
+    getKeyOfRow(row, index) {
+      const rowKey = this.table.rowKey;
+      if (rowKey) {
+        return getRowIdentity(row, rowKey);
+      }
+      return index;
+    },
+
+    isColumnHidden(index) {
+      if (this.fixed === true || this.fixed === 'left') {
+        return index >= this.leftFixedLeafCount;
+      } else if (this.fixed === 'right') {
+        return index < this.columnsCount - this.rightFixedLeafCount;
+      } else {
+        return (index < this.leftFixedLeafCount) || (index >= this.columnsCount - this.rightFixedLeafCount);
+      }
+    },
+
+    getSpan(row, column, rowIndex, columnIndex) {
+      let rowspan = 1;
+      let colspan = 1;
+      const fn = this.table.spanMethod;
+      if (typeof fn === 'function') {
+        const result = fn({
+          row,
+          column,
+          rowIndex,
+          columnIndex
+        });
+        if (Array.isArray(result)) {
+          rowspan = result[0];
+          colspan = result[1];
+        } else if (typeof result === 'object') {
+          rowspan = result.rowspan;
+          colspan = result.colspan;
+        }
+      }
+      return { rowspan, colspan };
+    },
+
+    getRowStyle(row, rowIndex) {
+      const rowStyle = this.table.rowStyle;
+      if (typeof rowStyle === 'function') {
+        return rowStyle.call(null, {
+          row,
+          rowIndex
+        });
+      }
+      return rowStyle || null;
+    },
+
+    getRowClass(row, rowIndex) {
+      const classes = ['el-table__row'];
+      if (this.table.highlightCurrentRow && row === this.store.states.currentRow) {
+        classes.push('current-row');
+      }
+
+      if (this.stripe && rowIndex % 2 === 1) {
+        classes.push('el-table__row--striped');
+      }
+      const rowClassName = this.table.rowClassName;
+      if (typeof rowClassName === 'string') {
+        classes.push(rowClassName);
+      } else if (typeof rowClassName === 'function') {
+        classes.push(rowClassName.call(null, {
+          row,
+          rowIndex
+        }));
+      }
+
+      if (this.store.states.expandRows.indexOf(row) > -1) {
+        classes.push('expanded');
+      }
+
+      return classes;
+    },
+
+    getCellStyle(rowIndex, columnIndex, row, column) {
+      const cellStyle = this.table.cellStyle;
+      if (typeof cellStyle === 'function') {
+        return cellStyle.call(null, {
+          rowIndex,
+          columnIndex,
+          row,
+          column
+        });
+      }
+      return cellStyle;
+    },
+
+    getCellClass(rowIndex, columnIndex, row, column) {
+      const classes = [column.id, column.align, column.className];
+
+      if (this.isColumnHidden(columnIndex)) {
+        classes.push('is-hidden');
+      }
+
+      const cellClassName = this.table.cellClassName;
+      if (typeof cellClassName === 'string') {
+        classes.push(cellClassName);
+      } else if (typeof cellClassName === 'function') {
+        classes.push(cellClassName.call(null, {
+          rowIndex,
+          columnIndex,
+          row,
+          column
+        }));
+      }
+
+      return classes.join(' ');
+    },
+
+    getColspanRealWidth(columns, colspan, index) {
+      if (colspan < 1) {
+        return columns[index].realWidth;
+      }
+      const widthArr = columns.map(({ realWidth }) => realWidth).slice(index, index + colspan);
+      return widthArr.reduce((acc, width) => acc + width, -1);
+    },
+
+    handleCellMouseEnter(event, row) {
+      const table = this.table;
+      const cell = getCell(event);
+
+      if (cell) {
+        const column = getColumnByCell(table, cell);
+        const hoverState = table.hoverState = {cell, column, row};
+        table.$emit('cell-mouse-enter', hoverState.row, hoverState.column, hoverState.cell, event);
+      }
+
+      // 判断是否text-overflow, 如果是就显示tooltip
+      const cellChild = event.target.querySelector('.cell');
+      if (!(hasClass(cellChild, 'el-tooltip') && cellChild.childNodes.length)) {
+        return;
+      }
+      // use range width instead of scrollWidth to determine whether the text is overflowing
+      // to address a potential FireFox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1074543#c3
+      const range = document.createRange();
+      range.setStart(cellChild, 0);
+      range.setEnd(cellChild, cellChild.childNodes.length);
+      const rangeWidth = range.getBoundingClientRect().width;
+      const padding = (parseInt(getStyle(cellChild, 'paddingLeft'), 10) || 0) +
+        (parseInt(getStyle(cellChild, 'paddingRight'), 10) || 0);
+      if ((rangeWidth + padding > cellChild.offsetWidth || cellChild.scrollWidth > cellChild.offsetWidth) && this.$refs.tooltip) {
+        const tooltip = this.$refs.tooltip;
+        // TODO 会引起整个 Table 的重新渲染，需要优化
+        this.tooltipContent = cell.innerText || cell.textContent;
+        tooltip.referenceElm = cell;
+        tooltip.$refs.popper && (tooltip.$refs.popper.style.display = 'none');
+        tooltip.doDestroy();
+        tooltip.setExpectedState(true);
+        this.activateTooltip(tooltip);
+      }
+    },
+
+    handleCellMouseLeave(event) {
+      const tooltip = this.$refs.tooltip;
+      if (tooltip) {
+        tooltip.setExpectedState(false);
+        tooltip.handleClosePopper();
+      }
+      const cell = getCell(event);
+      if (!cell) return;
+
+      const oldHoverState = this.table.hoverState || {};
+      this.table.$emit('cell-mouse-leave', oldHoverState.row, oldHoverState.column, oldHoverState.cell, event);
+    },
+
+    handleMouseEnter: debounce(30, function(index) {
+      this.store.commit('setHoverRow', index);
+    }),
+
+    handleMouseLeave: debounce(30, function() {
+      this.store.commit('setHoverRow', null);
+    }),
+
+    handleContextMenu(event, row) {
+      this.handleEvent(event, row, 'contextmenu');
+    },
+
+    handleDoubleClick(event, row) {
+      this.handleEvent(event, row, 'dblclick');
+    },
+
+    handleClick(event, row) {
+      this.store.commit('setCurrentRow', row);
+      this.handleEvent(event, row, 'click');
+    },
+
+    handleEvent(event, row, name) {
+      const table = this.table;
+      const cell = getCell(event);
+      let column;
+      if (cell) {
+        column = getColumnByCell(table, cell);
+        if (column) {
+          table.$emit(`cell-${name}`, row, column, cell, event);
+        }
+      }
+      table.$emit(`row-${name}`, row, column, event);
+    },
+
+    rowRender(row, $index, treeRowData) {
+      const { treeIndent, columns, firstDefaultColumnIndex } = this;
+      const columnsHidden = columns.map((column, index) => this.isColumnHidden(index));
+      const rowClasses = this.getRowClass(row, $index);
+      let display = true;
+      if (treeRowData) {
+        rowClasses.push('el-table__row--level-' + treeRowData.level);
+        display = treeRowData.display;
+      }
+      // 指令 v-show 会覆盖 row-style 中 display
+      // 使用 :style 代替 v-show https://github.com/ElemeFE/element/issues/16995
+      let displayStyle = display ? null : {
+        display: 'none'
+      };
+      return (<tr
+        style={ [displayStyle, this.getRowStyle(row, $index)] }
+        class={ rowClasses }
+        key={ this.getKeyOfRow(row, $index) }
+        on-dblclick={ ($event) => this.handleDoubleClick($event, row) }
+        on-click={ ($event) => this.handleClick($event, row) }
+        on-contextmenu={ ($event) => this.handleContextMenu($event, row) }
+        on-mouseenter={ _ => this.handleMouseEnter($index) }
+        on-mouseleave={ this.handleMouseLeave }>
+        {
+          columns.map((column, cellIndex) => {
+            const { rowspan, colspan } = this.getSpan(row, column, $index, cellIndex);
+            if (!rowspan || !colspan) {
+              return null;
+            }
+            const columnData = { ...column };
+            columnData.realWidth = this.getColspanRealWidth(columns, colspan, cellIndex);
+            const data = {
+              store: this.store,
+              _self: this.context || this.table.$vnode.context,
+              column: columnData,
+              row,
+              $index
+            };
+            if (cellIndex === firstDefaultColumnIndex && treeRowData) {
+              data.treeNode = {
+                indent: treeRowData.level * treeIndent,
+                level: treeRowData.level
+              };
+              if (typeof treeRowData.expanded === 'boolean') {
+                data.treeNode.expanded = treeRowData.expanded;
+                // 表明是懒加载
+                if ('loading' in treeRowData) {
+                  data.treeNode.loading = treeRowData.loading;
+                }
+                if ('noLazyChildren' in treeRowData) {
+                  data.treeNode.noLazyChildren = treeRowData.noLazyChildren;
+                }
+              }
+            }
+            return (
+              <td
+                style={ this.getCellStyle($index, cellIndex, row, column) }
+                class={ this.getCellClass($index, cellIndex, row, column) }
+                rowspan={ rowspan }
+                colspan={ colspan }
+                on-mouseenter={ ($event) => this.handleCellMouseEnter($event, row) }
+                on-mouseleave={ this.handleCellMouseLeave }>
+                {
+                  column.renderCell.call(
+                    this._renderProxy,
+                    this.$createElement,
+                    data,
+                    columnsHidden[cellIndex]
+                  )
+                }
+              </td>
+            );
+          })
+        }
+      </tr>);
+    },
+
+    wrappedRowRender(row, $index) {
+      const store = this.store;
+      const { isRowExpanded, assertRowKey } = store;
+      const { treeData, lazyTreeNodeMap, childrenColumnName, rowKey } = store.states;
+      if (this.hasExpandColumn && isRowExpanded(row)) {
+        const renderExpanded = this.table.renderExpanded;
+        const tr = this.rowRender(row, $index);
+        if (!renderExpanded) {
+          console.error('[Element Error]renderExpanded is required.');
+          return tr;
+        }
+        // 使用二维数组，避免修改 $index
+        return [[
+          tr,
+          <tr key={'expanded-row__' + tr.key}>
+            <td colspan={ this.columnsCount } class="el-table__expanded-cell">
+              { renderExpanded(this.$createElement, { row, $index, store: this.store }) }
+            </td>
+          </tr>]];
+      } else if (Object.keys(treeData).length) {
+        assertRowKey();
+        // TreeTable 时，rowKey 必须由用户设定，不使用 getKeyOfRow 计算
+        // 在调用 rowRender 函数时，仍然会计算 rowKey，不太好的操作
+        const key = getRowIdentity(row, rowKey);
+        let cur = treeData[key];
+        let treeRowData = null;
+        if (cur) {
+          treeRowData = {
+            expanded: cur.expanded,
+            level: cur.level,
+            display: true
+          };
+          if (typeof cur.lazy === 'boolean') {
+            if (typeof cur.loaded === 'boolean' && cur.loaded) {
+              treeRowData.noLazyChildren = !(cur.children && cur.children.length);
+            }
+            treeRowData.loading = cur.loading;
+          }
+        }
+        const tmp = [this.rowRender(row, $index, treeRowData)];
+        // 渲染嵌套数据
+        if (cur) {
+          // currentRow 记录的是 index，所以还需主动增加 TreeTable 的 index
+          let i = 0;
+          const traverse = (children, parent) => {
+            if (!(children && children.length && parent)) return;
+            children.forEach(node => {
+              // 父节点的 display 状态影响子节点的显示状态
+              const innerTreeRowData = {
+                display: parent.display && parent.expanded,
+                level: parent.level + 1
+              };
+              const childKey = getRowIdentity(node, rowKey);
+              if (childKey === undefined || childKey === null) {
+                throw new Error('for nested data item, row-key is required.');
+              }
+              cur = { ...treeData[childKey] };
+              // 对于当前节点，分成有无子节点两种情况。
+              // 如果包含子节点的，设置 expanded 属性。
+              // 对于它子节点的 display 属性由它本身的 expanded 与 display 共同决定。
+              if (cur) {
+                innerTreeRowData.expanded = cur.expanded;
+                // 懒加载的某些节点，level 未知
+                cur.level = cur.level || innerTreeRowData.level;
+                cur.display = !!(cur.expanded && innerTreeRowData.display);
+                if (typeof cur.lazy === 'boolean') {
+                  if (typeof cur.loaded === 'boolean' && cur.loaded) {
+                    innerTreeRowData.noLazyChildren = !(cur.children && cur.children.length);
+                  }
+                  innerTreeRowData.loading = cur.loading;
+                }
+              }
+              i++;
+              tmp.push(this.rowRender(node, $index + i, innerTreeRowData));
+              if (cur) {
+                const nodes = lazyTreeNodeMap[childKey] || node[childrenColumnName];
+                traverse(nodes, cur);
+              }
+            });
+          };
+          // 对于 root 节点，display 一定为 true
+          cur.display = true;
+          const nodes = lazyTreeNodeMap[key] || row[childrenColumnName];
+          traverse(nodes, cur);
+        }
+        return tmp;
+      } else {
+        return this.rowRender(row, $index);
+      }
+    }
+  }
+};

packages/table/src/table-column.js

@@ -0,0 +1,319 @@
+import { cellStarts, cellForced, defaultRenderCell, treeCellPrefix } from './config';
+import { mergeOptions, parseWidth, parseMinWidth, compose } from './util';
+import ElCheckbox from 'element-ui/packages/checkbox';
+
+let columnIdSeed = 1;
+
+export default {
+  name: 'ElTableColumn',
+
+  props: {
+    type: {
+      type: String,
+      default: 'default'
+    },
+    label: String,
+    className: String,
+    labelClassName: String,
+    property: String,
+    prop: String,
+    width: {},
+    minWidth: {},
+    renderHeader: Function,
+    sortable: {
+      type: [Boolean, String],
+      default: false
+    },
+    sortMethod: Function,
+    sortBy: [String, Function, Array],
+    resizable: {
+      type: Boolean,
+      default: true
+    },
+    columnKey: String,
+    align: String,
+    headerAlign: String,
+    showTooltipWhenOverflow: Boolean,
+    showOverflowTooltip: Boolean,
+    fixed: [Boolean, String],
+    formatter: Function,
+    selectable: Function,
+    reserveSelection: Boolean,
+    filterMethod: Function,
+    filteredValue: Array,
+    filters: Array,
+    filterPlacement: String,
+    filterMultiple: {
+      type: Boolean,
+      default: true
+    },
+    index: [Number, Function],
+    sortOrders: {
+      type: Array,
+      default() {
+        return ['ascending', 'descending', null];
+      },
+      validator(val) {
+        return val.every(order => ['ascending', 'descending', null].indexOf(order) > -1);
+      }
+    }
+  },
+
+  data() {
+    return {
+      isSubColumn: false,
+      columns: []
+    };
+  },
+
+  computed: {
+    owner() {
+      let parent = this.$parent;
+      while (parent && !parent.tableId) {
+        parent = parent.$parent;
+      }
+      return parent;
+    },
+
+    columnOrTableParent() {
+      let parent = this.$parent;
+      while (parent && !parent.tableId && !parent.columnId) {
+        parent = parent.$parent;
+      }
+      return parent;
+    },
+
+    realWidth() {
+      return parseWidth(this.width);
+    },
+
+    realMinWidth() {
+      return parseMinWidth(this.minWidth);
+    },
+
+    realAlign() {
+      return this.align ? 'is-' + this.align : null;
+    },
+
+    realHeaderAlign() {
+      return this.headerAlign ? 'is-' + this.headerAlign : this.realAlign;
+    }
+  },
+
+  methods: {
+    getPropsData(...props) {
+      return props.reduce((prev, cur) => {
+        if (Array.isArray(cur)) {
+          cur.forEach((key) => {
+            prev[key] = this[key];
+          });
+        }
+        return prev;
+      }, {});
+    },
+
+    getColumnElIndex(children, child) {
+      return [].indexOf.call(children, child);
+    },
+
+    setColumnWidth(column) {
+      if (this.realWidth) {
+        column.width = this.realWidth;
+      }
+      if (this.realMinWidth) {
+        column.minWidth = this.realMinWidth;
+      }
+      if (!column.minWidth) {
+        column.minWidth = 80;
+      }
+      column.realWidth = column.width === undefined ? column.minWidth : column.width;
+      return column;
+    },
+
+    setColumnForcedProps(column) {
+      // 对于特定类型的 column，某些属性不允许设置
+      const type = column.type;
+      const source = cellForced[type] || {};
+      Object.keys(source).forEach(prop => {
+        let value = source[prop];
+        if (value !== undefined) {
+          column[prop] = prop === 'className' ? `${column[prop]} ${value}` : value;
+        }
+      });
+      return column;
+    },
+
+    setColumnRenders(column) {
+      // renderHeader 属性不推荐使用。
+      if (this.renderHeader) {
+        console.warn('[Element Warn][TableColumn]Comparing to render-header, scoped-slot header is easier to use. We recommend users to use scoped-slot header.');
+      } else if (column.type !== 'selection') {
+        column.renderHeader = (h, scope) => {
+          const renderHeader = this.$scopedSlots.header;
+          return renderHeader ? renderHeader(scope) : column.label;
+        };
+      }
+
+      let originRenderCell = column.renderCell;
+      // TODO: 这里的实现调整
+      if (column.type === 'expand') {
+        // 对于展开行，renderCell 不允许配置的。在上一步中已经设置过，这里需要简单封装一下。
+        column.renderCell = (h, data) => (<div class="cell">
+          { originRenderCell(h, data) }
+        </div>);
+        this.owner.renderExpanded = (h, data) => {
+          return this.$scopedSlots.default
+            ? this.$scopedSlots.default(data)
+            : this.$slots.default;
+        };
+      } else {
+        originRenderCell = originRenderCell || defaultRenderCell;
+        // 对 renderCell 进行包装
+        column.renderCell = (h, data) => {
+          let children = null;
+          if (this.$scopedSlots.default) {
+            children = this.$scopedSlots.default(data);
+          } else {
+            children = originRenderCell(h, data);
+          }
+          const prefix = treeCellPrefix(h, data);
+          const props = {
+            class: 'cell',
+            style: {}
+          };
+          if (column.showOverflowTooltip) {
+            props.class += ' el-tooltip';
+            props.style = {width: (data.column.realWidth || data.column.width) - 1 + 'px'};
+          }
+          return (<div { ...props }>
+            { prefix }
+            { children }
+          </div>);
+        };
+      }
+      return column;
+    },
+
+    registerNormalWatchers() {
+      const props = ['label', 'property', 'filters', 'filterMultiple', 'sortable', 'index', 'formatter', 'className', 'labelClassName', 'showOverflowTooltip'];
+      // 一些属性具有别名
+      const aliases = {
+        prop: 'property',
+        realAlign: 'align',
+        realHeaderAlign: 'headerAlign',
+        realWidth: 'width'
+      };
+      const allAliases = props.reduce((prev, cur) => {
+        prev[cur] = cur;
+        return prev;
+      }, aliases);
+
+      Object.keys(allAliases).forEach(key => {
+        const columnKey = aliases[key];
+
+        this.$watch(key, (newVal) => {
+          this.columnConfig[columnKey] = newVal;
+        });
+      });
+    },
+
+    registerComplexWatchers() {
+      const props = ['fixed'];
+      const aliases = {
+        realWidth: 'width',
+        realMinWidth: 'minWidth'
+      };
+      const allAliases = props.reduce((prev, cur) => {
+        prev[cur] = cur;
+        return prev;
+      }, aliases);
+
+      Object.keys(allAliases).forEach(key => {
+        const columnKey = aliases[key];
+
+        this.$watch(key, (newVal) => {
+          this.columnConfig[columnKey] = newVal;
+          const updateColumns = columnKey === 'fixed';
+          this.owner.store.scheduleLayout(updateColumns);
+        });
+      });
+    }
+  },
+
+  components: {
+    ElCheckbox
+  },
+
+  beforeCreate() {
+    this.row = {};
+    this.column = {};
+    this.$index = 0;
+    this.columnId = '';
+  },
+
+  created() {
+    const parent = this.columnOrTableParent;
+    this.isSubColumn = this.owner !== parent;
+    this.columnId = (parent.tableId || parent.columnId) + '_column_' + columnIdSeed++;
+
+    const type = this.type || 'default';
+    const sortable = this.sortable === '' ? true : this.sortable;
+    const defaults = {
+      ...cellStarts[type],
+      id: this.columnId,
+      type: type,
+      property: this.prop || this.property,
+      align: this.realAlign,
+      headerAlign: this.realHeaderAlign,
+      showOverflowTooltip: this.showOverflowTooltip || this.showTooltipWhenOverflow,
+      // filter 相关属性
+      filterable: this.filters || this.filterMethod,
+      filteredValue: [],
+      filterPlacement: '',
+      isColumnGroup: false,
+      filterOpened: false,
+      // sort 相关属性
+      sortable: sortable,
+      // index 列
+      index: this.index
+    };
+
+    const basicProps = ['columnKey', 'label', 'className', 'labelClassName', 'type', 'renderHeader', 'formatter', 'fixed', 'resizable'];
+    const sortProps = ['sortMethod', 'sortBy', 'sortOrders'];
+    const selectProps = ['selectable', 'reserveSelection'];
+    const filterProps = ['filterMethod', 'filters', 'filterMultiple', 'filterOpened', 'filteredValue', 'filterPlacement'];
+
+    let column = this.getPropsData(basicProps, sortProps, selectProps, filterProps);
+    column = mergeOptions(defaults, column);
+
+    // 注意 compose 中函数执行的顺序是从右到左
+    const chains = compose(this.setColumnRenders, this.setColumnWidth, this.setColumnForcedProps);
+    column = chains(column);
+
+    this.columnConfig = column;
+
+    // 注册 watcher
+    this.registerNormalWatchers();
+    this.registerComplexWatchers();
+  },
+
+  mounted() {
+    const owner = this.owner;
+    const parent = this.columnOrTableParent;
+    const children = this.isSubColumn ? parent.$el.children : parent.$refs.hiddenColumns.children;
+    const columnIndex = this.getColumnElIndex(children, this.$el);
+
+    owner.store.commit('insertColumn', this.columnConfig, columnIndex, this.isSubColumn ? parent.columnConfig : null);
+  },
+
+  destroyed() {
+    if (!this.$parent) return;
+    const parent = this.$parent;
+    this.owner.store.commit('removeColumn', this.columnConfig, this.isSubColumn ? parent.columnConfig : null);
+  },
+
+  render(h) {
+    // slots 也要渲染，需要计算合并表头
+    return h('div', this.$slots.default);
+  }
+};

packages/table/src/table-footer.js

@@ -0,0 +1,153 @@
+import LayoutObserver from './layout-observer';
+import { mapStates } from './store/helper';
+
+export default {
+  name: 'ElTableFooter',
+
+  mixins: [LayoutObserver],
+
+  render(h) {
+    let sums = [];
+    if (this.summaryMethod) {
+      sums = this.summaryMethod({ columns: this.columns, data: this.store.states.data });
+    } else {
+      this.columns.forEach((column, index) => {
+        if (index === 0) {
+          sums[index] = this.sumText;
+          return;
+        }
+        const values = this.store.states.data.map(item => Number(item[column.property]));
+        const precisions = [];
+        let notNumber = true;
+        values.forEach(value => {
+          if (!isNaN(value)) {
+            notNumber = false;
+            let decimal = ('' + value).split('.')[1];
+            precisions.push(decimal ? decimal.length : 0);
+          }
+        });
+        const precision = Math.max.apply(null, precisions);
+        if (!notNumber) {
+          sums[index] = values.reduce((prev, curr) => {
+            const value = Number(curr);
+            if (!isNaN(value)) {
+              return parseFloat((prev + curr).toFixed(Math.min(precision, 20)));
+            } else {
+              return prev;
+            }
+          }, 0);
+        } else {
+          sums[index] = '';
+        }
+      });
+    }
+
+    return (
+      <table
+        class="el-table__footer"
+        cellspacing="0"
+        cellpadding="0"
+        border="0">
+        <colgroup>
+          {
+            this.columns.map(column => <col name={ column.id } key={column.id} />)
+          }
+          {
+            this.hasGutter ? <col name="gutter" /> : ''
+          }
+        </colgroup>
+        <tbody class={ [{ 'has-gutter': this.hasGutter }] }>
+          <tr>
+            {
+              this.columns.map((column, cellIndex) => <td
+                key={cellIndex}
+                colspan={ column.colSpan }
+                rowspan={ column.rowSpan }
+                class={ this.getRowClasses(column, cellIndex) }>
+                <div class={ ['cell', column.labelClassName] }>
+                  {
+                    sums[cellIndex]
+                  }
+                </div>
+              </td>)
+            }
+            {
+              this.hasGutter ? <th class="gutter"></th> : ''
+            }
+          </tr>
+        </tbody>
+      </table>
+    );
+  },
+
+  props: {
+    fixed: String,
+    store: {
+      required: true
+    },
+    summaryMethod: Function,
+    sumText: String,
+    border: Boolean,
+    defaultSort: {
+      type: Object,
+      default() {
+        return {
+          prop: '',
+          order: ''
+        };
+      }
+    }
+  },
+
+  computed: {
+    table() {
+      return this.$parent;
+    },
+
+    hasGutter() {
+      return !this.fixed && this.tableLayout.gutterWidth;
+    },
+
+    ...mapStates({
+      columns: 'columns',
+      isAllSelected: 'isAllSelected',
+      leftFixedLeafCount: 'fixedLeafColumnsLength',
+      rightFixedLeafCount: 'rightFixedLeafColumnsLength',
+      columnsCount: states => states.columns.length,
+      leftFixedCount: states => states.fixedColumns.length,
+      rightFixedCount: states => states.rightFixedColumns.length
+    })
+  },
+
+  methods: {
+    isCellHidden(index, columns, column) {
+      if (this.fixed === true || this.fixed === 'left') {
+        return index >= this.leftFixedLeafCount;
+      } else if (this.fixed === 'right') {
+        let before = 0;
+        for (let i = 0; i < index; i++) {
+          before += columns[i].colSpan;
+        }
+        return before < this.columnsCount - this.rightFixedLeafCount;
+      } else if (!this.fixed && column.fixed) { // hide cell when footer instance is not fixed and column is fixed
+        return true;
+      } else {
+        return (index < this.leftFixedCount) || (index >= this.columnsCount - this.rightFixedCount);
+      }
+    },
+
+    getRowClasses(column, cellIndex) {
+      const classes = [column.id, column.align, column.labelClassName];
+      if (column.className) {
+        classes.push(column.className);
+      }
+      if (this.isCellHidden(cellIndex, this.columns, column)) {
+        classes.push('is-hidden');
+      }
+      if (!column.children) {
+        classes.push('is-leaf');
+      }
+      return classes;
+    }
+  }
+};

packages/table/src/table-header.js

@@ -0,0 +1,510 @@
+import Vue from 'vue';
+import { hasClass, addClass, removeClass } from 'element-ui/src/utils/dom';
+import ElCheckbox from 'element-ui/packages/checkbox';
+import FilterPanel from './filter-panel.vue';
+import LayoutObserver from './layout-observer';
+import { mapStates } from './store/helper';
+
+const getAllColumns = (columns) => {
+  const result = [];
+  columns.forEach((column) => {
+    if (column.children) {
+      result.push(column);
+      result.push.apply(result, getAllColumns(column.children));
+    } else {
+      result.push(column);
+    }
+  });
+  return result;
+};
+
+const convertToRows = (originColumns) => {
+  let maxLevel = 1;
+  const traverse = (column, parent) => {
+    if (parent) {
+      column.level = parent.level + 1;
+      if (maxLevel < column.level) {
+        maxLevel = column.level;
+      }
+    }
+    if (column.children) {
+      let colSpan = 0;
+      column.children.forEach((subColumn) => {
+        traverse(subColumn, column);
+        colSpan += subColumn.colSpan;
+      });
+      column.colSpan = colSpan;
+    } else {
+      column.colSpan = 1;
+    }
+  };
+
+  originColumns.forEach((column) => {
+    column.level = 1;
+    traverse(column);
+  });
+
+  const rows = [];
+  for (let i = 0; i < maxLevel; i++) {
+    rows.push([]);
+  }
+
+  const allColumns = getAllColumns(originColumns);
+
+  allColumns.forEach((column) => {
+    if (!column.children) {
+      column.rowSpan = maxLevel - column.level + 1;
+    } else {
+      column.rowSpan = 1;
+    }
+    rows[column.level - 1].push(column);
+  });
+
+  return rows;
+};
+
+export default {
+  name: 'ElTableHeader',
+
+  mixins: [LayoutObserver],
+
+  render(h) {
+    const originColumns = this.store.states.originColumns;
+    const columnRows = convertToRows(originColumns, this.columns);
+    // 是否拥有多级表头
+    const isGroup = columnRows.length > 1;
+    if (isGroup) this.$parent.isGroup = true;
+    return (
+      <table
+        class="el-table__header"
+        cellspacing="0"
+        cellpadding="0"
+        border="0">
+        <colgroup>
+          {
+            this.columns.map(column => <col name={ column.id } key={column.id} />)
+          }
+          {
+            this.hasGutter ? <col name="gutter" /> : ''
+          }
+        </colgroup>
+        <thead class={ [{ 'is-group': isGroup, 'has-gutter': this.hasGutter }] }>
+          {
+            this._l(columnRows, (columns, rowIndex) =>
+              <tr
+                style={ this.getHeaderRowStyle(rowIndex) }
+                class={ this.getHeaderRowClass(rowIndex) }
+              >
+                {
+                  columns.map((column, cellIndex) => (<th
+                    colspan={ column.colSpan }
+                    rowspan={ column.rowSpan }
+                    on-mousemove={ ($event) => this.handleMouseMove($event, column) }
+                    on-mouseout={ this.handleMouseOut }
+                    on-mousedown={ ($event) => this.handleMouseDown($event, column) }
+                    on-click={ ($event) => this.handleHeaderClick($event, column) }
+                    on-contextmenu={ ($event) => this.handleHeaderContextMenu($event, column) }
+                    style={ this.getHeaderCellStyle(rowIndex, cellIndex, columns, column) }
+                    class={ this.getHeaderCellClass(rowIndex, cellIndex, columns, column) }
+                    key={ column.id }>
+                    <div class={ ['cell', column.filteredValue && column.filteredValue.length > 0 ? 'highlight' : '', column.labelClassName] }>
+                      {
+                        column.renderHeader
+                          ? column.renderHeader.call(this._renderProxy, h, { column, $index: cellIndex, store: this.store, _self: this.$parent.$vnode.context })
+                          : column.label
+                      }
+                      {
+                        column.sortable ? (<span
+                          class="caret-wrapper"
+                          on-click={ ($event) => this.handleSortClick($event, column) }>
+                          <i class="sort-caret ascending"
+                            on-click={ ($event) => this.handleSortClick($event, column, 'ascending') }>
+                          </i>
+                          <i class="sort-caret descending"
+                            on-click={ ($event) => this.handleSortClick($event, column, 'descending') }>
+                          </i>
+                        </span>) : ''
+                      }
+                      {
+                        column.filterable ? (<span
+                          class="el-table__column-filter-trigger"
+                          on-click={ ($event) => this.handleFilterClick($event, column) }>
+                          <i class={ ['el-icon-arrow-down', column.filterOpened ? 'el-icon-arrow-up' : ''] }></i>
+                        </span>) : ''
+                      }
+                    </div>
+                  </th>))
+                }
+                {
+                  this.hasGutter ? <th class="gutter"></th> : ''
+                }
+              </tr>
+            )
+          }
+        </thead>
+      </table>
+    );
+  },
+
+  props: {
+    fixed: String,
+    store: {
+      required: true
+    },
+    border: Boolean,
+    defaultSort: {
+      type: Object,
+      default() {
+        return {
+          prop: '',
+          order: ''
+        };
+      }
+    }
+  },
+
+  components: {
+    ElCheckbox
+  },
+
+  computed: {
+    table() {
+      return this.$parent;
+    },
+
+    hasGutter() {
+      return !this.fixed && this.tableLayout.gutterWidth;
+    },
+
+    ...mapStates({
+      columns: 'columns',
+      isAllSelected: 'isAllSelected',
+      leftFixedLeafCount: 'fixedLeafColumnsLength',
+      rightFixedLeafCount: 'rightFixedLeafColumnsLength',
+      columnsCount: states => states.columns.length,
+      leftFixedCount: states => states.fixedColumns.length,
+      rightFixedCount: states => states.rightFixedColumns.length
+    })
+  },
+
+  created() {
+    this.filterPanels = {};
+  },
+
+  mounted() {
+    // nextTick 是有必要的 https://github.com/ElemeFE/element/pull/11311
+    this.$nextTick(() => {
+      const { prop, order } = this.defaultSort;
+      const init = true;
+      this.store.commit('sort', { prop, order, init });
+    });
+  },
+
+  beforeDestroy() {
+    const panels = this.filterPanels;
+    for (let prop in panels) {
+      if (panels.hasOwnProperty(prop) && panels[prop]) {
+        panels[prop].$destroy(true);
+      }
+    }
+  },
+
+  methods: {
+    isCellHidden(index, columns) {
+      let start = 0;
+      for (let i = 0; i < index; i++) {
+        start += columns[i].colSpan;
+      }
+      const after = start + columns[index].colSpan - 1;
+      if (this.fixed === true || this.fixed === 'left') {
+        return after >= this.leftFixedLeafCount;
+      } else if (this.fixed === 'right') {
+        return start < this.columnsCount - this.rightFixedLeafCount;
+      } else {
+        return (after < this.leftFixedLeafCount) || (start >= this.columnsCount - this.rightFixedLeafCount);
+      }
+    },
+
+    getHeaderRowStyle(rowIndex) {
+      const headerRowStyle = this.table.headerRowStyle;
+      if (typeof headerRowStyle === 'function') {
+        return headerRowStyle.call(null, { rowIndex });
+      }
+      return headerRowStyle;
+    },
+
+    getHeaderRowClass(rowIndex) {
+      const classes = [];
+
+      const headerRowClassName = this.table.headerRowClassName;
+      if (typeof headerRowClassName === 'string') {
+        classes.push(headerRowClassName);
+      } else if (typeof headerRowClassName === 'function') {
+        classes.push(headerRowClassName.call(null, { rowIndex }));
+      }
+
+      return classes.join(' ');
+    },
+
+    getHeaderCellStyle(rowIndex, columnIndex, row, column) {
+      const headerCellStyle = this.table.headerCellStyle;
+      if (typeof headerCellStyle === 'function') {
+        return headerCellStyle.call(null, {
+          rowIndex,
+          columnIndex,
+          row,
+          column
+        });
+      }
+      return headerCellStyle;
+    },
+
+    getHeaderCellClass(rowIndex, columnIndex, row, column) {
+      const classes = [column.id, column.order, column.headerAlign, column.className, column.labelClassName];
+
+      if (rowIndex === 0 && this.isCellHidden(columnIndex, row)) {
+        classes.push('is-hidden');
+      }
+
+      if (!column.children) {
+        classes.push('is-leaf');
+      }
+
+      if (column.sortable) {
+        classes.push('is-sortable');
+      }
+
+      const headerCellClassName = this.table.headerCellClassName;
+      if (typeof headerCellClassName === 'string') {
+        classes.push(headerCellClassName);
+      } else if (typeof headerCellClassName === 'function') {
+        classes.push(headerCellClassName.call(null, {
+          rowIndex,
+          columnIndex,
+          row,
+          column
+        }));
+      }
+
+      return classes.join(' ');
+    },
+
+    toggleAllSelection(event) {
+      event.stopPropagation();
+      this.store.commit('toggleAllSelection');
+    },
+
+    handleFilterClick(event, column) {
+      event.stopPropagation();
+      const target = event.target;
+      let cell = target.tagName === 'TH' ? target : target.parentNode;
+      if (hasClass(cell, 'noclick')) return;
+      cell = cell.querySelector('.el-table__column-filter-trigger') || cell;
+      const table = this.$parent;
+
+      let filterPanel = this.filterPanels[column.id];
+
+      if (filterPanel && column.filterOpened) {
+        filterPanel.showPopper = false;
+        return;
+      }
+
+      if (!filterPanel) {
+        filterPanel = new Vue(FilterPanel);
+        this.filterPanels[column.id] = filterPanel;
+        if (column.filterPlacement) {
+          filterPanel.placement = column.filterPlacement;
+        }
+        filterPanel.table = table;
+        filterPanel.cell = cell;
+        filterPanel.column = column;
+        !this.$isServer && filterPanel.$mount(document.createElement('div'));
+      }
+
+      setTimeout(() => {
+        filterPanel.showPopper = true;
+      }, 16);
+    },
+
+    handleHeaderClick(event, column) {
+      if (!column.filters && column.sortable) {
+        this.handleSortClick(event, column);
+      } else if (column.filterable && !column.sortable) {
+        this.handleFilterClick(event, column);
+      }
+
+      this.$parent.$emit('header-click', column, event);
+    },
+
+    handleHeaderContextMenu(event, column) {
+      this.$parent.$emit('header-contextmenu', column, event);
+    },
+
+    handleMouseDown(event, column) {
+      if (this.$isServer) return;
+      if (column.children && column.children.length > 0) return;
+      /* istanbul ignore if */
+      if (this.draggingColumn && this.border) {
+        this.dragging = true;
+
+        this.$parent.resizeProxyVisible = true;
+
+        const table = this.$parent;
+        const tableEl = table.$el;
+        const tableLeft = tableEl.getBoundingClientRect().left;
+        const columnEl = this.$el.querySelector(`th.${column.id}`);
+        const columnRect = columnEl.getBoundingClientRect();
+        const minLeft = columnRect.left - tableLeft + 30;
+
+        addClass(columnEl, 'noclick');
+
+        this.dragState = {
+          startMouseLeft: event.clientX,
+          startLeft: columnRect.right - tableLeft,
+          startColumnLeft: columnRect.left - tableLeft,
+          tableLeft
+        };
+
+        const resizeProxy = table.$refs.resizeProxy;
+        resizeProxy.style.left = this.dragState.startLeft + 'px';
+
+        document.onselectstart = function() { return false; };
+        document.ondragstart = function() { return false; };
+
+        const handleMouseMove = (event) => {
+          const deltaLeft = event.clientX - this.dragState.startMouseLeft;
+          const proxyLeft = this.dragState.startLeft + deltaLeft;
+
+          resizeProxy.style.left = Math.max(minLeft, proxyLeft) + 'px';
+        };
+
+        const handleMouseUp = () => {
+          if (this.dragging) {
+            const {
+              startColumnLeft,
+              startLeft
+            } = this.dragState;
+            const finalLeft = parseInt(resizeProxy.style.left, 10);
+            const columnWidth = finalLeft - startColumnLeft;
+            column.width = column.realWidth = columnWidth;
+            table.$emit('header-dragend', column.width, startLeft - startColumnLeft, column, event);
+
+            this.store.scheduleLayout();
+
+            document.body.style.cursor = '';
+            this.dragging = false;
+            this.draggingColumn = null;
+            this.dragState = {};
+
+            table.resizeProxyVisible = false;
+          }
+
+          document.removeEventListener('mousemove', handleMouseMove);
+          document.removeEventListener('mouseup', handleMouseUp);
+          document.onselectstart = null;
+          document.ondragstart = null;
+
+          setTimeout(function() {
+            removeClass(columnEl, 'noclick');
+          }, 0);
+        };
+
+        document.addEventListener('mousemove', handleMouseMove);
+        document.addEventListener('mouseup', handleMouseUp);
+      }
+    },
+
+    handleMouseMove(event, column) {
+      if (column.children && column.children.length > 0) return;
+      let target = event.target;
+      while (target && target.tagName !== 'TH') {
+        target = target.parentNode;
+      }
+
+      if (!column || !column.resizable) return;
+
+      if (!this.dragging && this.border) {
+        let rect = target.getBoundingClientRect();
+
+        const bodyStyle = document.body.style;
+        if (rect.width > 12 && rect.right - event.pageX < 8) {
+          bodyStyle.cursor = 'col-resize';
+          if (hasClass(target, 'is-sortable')) {
+            target.style.cursor = 'col-resize';
+          }
+          this.draggingColumn = column;
+        } else if (!this.dragging) {
+          bodyStyle.cursor = '';
+          if (hasClass(target, 'is-sortable')) {
+            target.style.cursor = 'pointer';
+          }
+          this.draggingColumn = null;
+        }
+      }
+    },
+
+    handleMouseOut() {
+      if (this.$isServer) return;
+      document.body.style.cursor = '';
+    },
+
+    toggleOrder({ order, sortOrders }) {
+      if (order === '') return sortOrders[0];
+      const index = sortOrders.indexOf(order || null);
+      return sortOrders[index > sortOrders.length - 2 ? 0 : index + 1];
+    },
+
+    handleSortClick(event, column, givenOrder) {
+      event.stopPropagation();
+      let order = column.order === givenOrder
+        ? null
+        : (givenOrder || this.toggleOrder(column));
+
+      let target = event.target;
+      while (target && target.tagName !== 'TH') {
+        target = target.parentNode;
+      }
+
+      if (target && target.tagName === 'TH') {
+        if (hasClass(target, 'noclick')) {
+          removeClass(target, 'noclick');
+          return;
+        }
+      }
+
+      if (!column.sortable) return;
+
+      const states = this.store.states;
+      let sortProp = states.sortProp;
+      let sortOrder;
+      const sortingColumn = states.sortingColumn;
+
+      if (sortingColumn !== column || (sortingColumn === column && sortingColumn.order === null)) {
+        if (sortingColumn) {
+          sortingColumn.order = null;
+        }
+        states.sortingColumn = column;
+        sortProp = column.property;
+      }
+
+      if (!order) {
+        sortOrder = column.order = null;
+      } else {
+        sortOrder = column.order = order;
+      }
+
+      states.sortProp = sortProp;
+      states.sortOrder = sortOrder;
+
+      this.store.commit('changeSortCondition');
+    }
+  },
+
+  data() {
+    return {
+      draggingColumn: null,
+      dragging: false,
+      dragState: {}
+    };
+  }
+};

packages/table/src/table-layout.js

@@ -0,0 +1,250 @@
+import Vue from 'vue';
+import scrollbarWidth from 'element-ui/src/utils/scrollbar-width';
+import { parseHeight } from './util';
+
+class TableLayout {
+  constructor(options) {
+    this.observers = [];
+    this.table = null;
+    this.store = null;
+    this.columns = null;
+    this.fit = true;
+    this.showHeader = true;
+
+    this.height = null;
+    this.scrollX = false;
+    this.scrollY = false;
+    this.bodyWidth = null;
+    this.fixedWidth = null;
+    this.rightFixedWidth = null;
+    this.tableHeight = null;
+    this.headerHeight = 44; // Table Header Height
+    this.appendHeight = 0; // Append Slot Height
+    this.footerHeight = 44; // Table Footer Height
+    this.viewportHeight = null; // Table Height - Scroll Bar Height
+    this.bodyHeight = null; // Table Height - Table Header Height
+    this.fixedBodyHeight = null; // Table Height - Table Header Height - Scroll Bar Height
+    this.gutterWidth = scrollbarWidth();
+
+    for (let name in options) {
+      if (options.hasOwnProperty(name)) {
+        this[name] = options[name];
+      }
+    }
+
+    if (!this.table) {
+      throw new Error('table is required for Table Layout');
+    }
+    if (!this.store) {
+      throw new Error('store is required for Table Layout');
+    }
+  }
+
+  updateScrollY() {
+    const height = this.height;
+    if (height === null) return false;
+    const bodyWrapper = this.table.bodyWrapper;
+    if (this.table.$el && bodyWrapper) {
+      const body = bodyWrapper.querySelector('.el-table__body');
+      const prevScrollY = this.scrollY;
+      const scrollY = body.offsetHeight > this.bodyHeight;
+      this.scrollY = scrollY;
+      return prevScrollY !== scrollY;
+    }
+    return false;
+  }
+
+  setHeight(value, prop = 'height') {
+    if (Vue.prototype.$isServer) return;
+    const el = this.table.$el;
+    value = parseHeight(value);
+    this.height = value;
+
+    if (!el && (value || value === 0)) return Vue.nextTick(() => this.setHeight(value, prop));
+
+    if (typeof value === 'number') {
+      el.style[prop] = value + 'px';
+      this.updateElsHeight();
+    } else if (typeof value === 'string') {
+      el.style[prop] = value;
+      this.updateElsHeight();
+    }
+  }
+
+  setMaxHeight(value) {
+    this.setHeight(value, 'max-height');
+  }
+
+  getFlattenColumns() {
+    const flattenColumns = [];
+    const columns = this.table.columns;
+    columns.forEach((column) => {
+      if (column.isColumnGroup) {
+        flattenColumns.push.apply(flattenColumns, column.columns);
+      } else {
+        flattenColumns.push(column);
+      }
+    });
+
+    return flattenColumns;
+  }
+
+  updateElsHeight() {
+    if (!this.table.$ready) return Vue.nextTick(() => this.updateElsHeight());
+    const { headerWrapper, appendWrapper, footerWrapper } = this.table.$refs;
+    this.appendHeight = appendWrapper ? appendWrapper.offsetHeight : 0;
+
+    if (this.showHeader && !headerWrapper) return;
+
+    // fix issue (https://github.com/ElemeFE/element/pull/16956)
+    const headerTrElm = headerWrapper ? headerWrapper.querySelector('.el-table__header tr') : null;
+    const noneHeader = this.headerDisplayNone(headerTrElm);
+
+    const headerHeight = this.headerHeight = !this.showHeader ? 0 : headerWrapper.offsetHeight;
+    if (this.showHeader && !noneHeader && headerWrapper.offsetWidth > 0 && (this.table.columns || []).length > 0 && headerHeight < 2) {
+      return Vue.nextTick(() => this.updateElsHeight());
+    }
+    const tableHeight = this.tableHeight = this.table.$el.clientHeight;
+    const footerHeight = this.footerHeight = footerWrapper ? footerWrapper.offsetHeight : 0;
+    if (this.height !== null) {
+      this.bodyHeight = tableHeight - headerHeight - footerHeight + (footerWrapper ? 1 : 0);
+    }
+    this.fixedBodyHeight = this.scrollX ? (this.bodyHeight - this.gutterWidth) : this.bodyHeight;
+
+    const noData = !(this.store.states.data && this.store.states.data.length);
+    this.viewportHeight = this.scrollX ? tableHeight - (noData ? 0 : this.gutterWidth) : tableHeight;
+
+    this.updateScrollY();
+    this.notifyObservers('scrollable');
+  }
+
+  headerDisplayNone(elm) {
+    if (!elm) return true;
+    let headerChild = elm;
+    while (headerChild.tagName !== 'DIV') {
+      if (getComputedStyle(headerChild).display === 'none') {
+        return true;
+      }
+      headerChild = headerChild.parentElement;
+    }
+    return false;
+  }
+
+  updateColumnsWidth() {
+    if (Vue.prototype.$isServer) return;
+    const fit = this.fit;
+    const bodyWidth = this.table.$el.clientWidth;
+    let bodyMinWidth = 0;
+
+    const flattenColumns = this.getFlattenColumns();
+    let flexColumns = flattenColumns.filter((column) => typeof column.width !== 'number');
+
+    flattenColumns.forEach((column) => { // Clean those columns whose width changed from flex to unflex
+      if (typeof column.width === 'number' && column.realWidth) column.realWidth = null;
+    });
+
+    if (flexColumns.length > 0 && fit) {
+      flattenColumns.forEach((column) => {
+        bodyMinWidth += column.width || column.minWidth || 80;
+      });
+
+      const scrollYWidth = this.scrollY ? this.gutterWidth : 0;
+
+      if (bodyMinWidth <= bodyWidth - scrollYWidth) { // DON'T HAVE SCROLL BAR
+        this.scrollX = false;
+
+        const totalFlexWidth = bodyWidth - scrollYWidth - bodyMinWidth;
+
+        if (flexColumns.length === 1) {
+          flexColumns[0].realWidth = (flexColumns[0].minWidth || 80) + totalFlexWidth;
+        } else {
+          const allColumnsWidth = flexColumns.reduce((prev, column) => prev + (column.minWidth || 80), 0);
+          const flexWidthPerPixel = totalFlexWidth / allColumnsWidth;
+          let noneFirstWidth = 0;
+
+          flexColumns.forEach((column, index) => {
+            if (index === 0) return;
+            const flexWidth = Math.floor((column.minWidth || 80) * flexWidthPerPixel);
+            noneFirstWidth += flexWidth;
+            column.realWidth = (column.minWidth || 80) + flexWidth;
+          });
+
+          flexColumns[0].realWidth = (flexColumns[0].minWidth || 80) + totalFlexWidth - noneFirstWidth;
+        }
+      } else { // HAVE HORIZONTAL SCROLL BAR
+        this.scrollX = true;
+        flexColumns.forEach(function(column) {
+          column.realWidth = column.minWidth;
+        });
+      }
+
+      this.bodyWidth = Math.max(bodyMinWidth, bodyWidth);
+      this.table.resizeState.width = this.bodyWidth;
+    } else {
+      flattenColumns.forEach((column) => {
+        if (!column.width && !column.minWidth) {
+          column.realWidth = 80;
+        } else {
+          column.realWidth = column.width || column.minWidth;
+        }
+
+        bodyMinWidth += column.realWidth;
+      });
+      this.scrollX = bodyMinWidth > bodyWidth;
+
+      this.bodyWidth = bodyMinWidth;
+    }
+
+    const fixedColumns = this.store.states.fixedColumns;
+
+    if (fixedColumns.length > 0) {
+      let fixedWidth = 0;
+      fixedColumns.forEach(function(column) {
+        fixedWidth += column.realWidth || column.width;
+      });
+
+      this.fixedWidth = fixedWidth;
+    }
+
+    const rightFixedColumns = this.store.states.rightFixedColumns;
+    if (rightFixedColumns.length > 0) {
+      let rightFixedWidth = 0;
+      rightFixedColumns.forEach(function(column) {
+        rightFixedWidth += column.realWidth || column.width;
+      });
+
+      this.rightFixedWidth = rightFixedWidth;
+    }
+
+    this.notifyObservers('columns');
+  }
+
+  addObserver(observer) {
+    this.observers.push(observer);
+  }
+
+  removeObserver(observer) {
+    const index = this.observers.indexOf(observer);
+    if (index !== -1) {
+      this.observers.splice(index, 1);
+    }
+  }
+
+  notifyObservers(event) {
+    const observers = this.observers;
+    observers.forEach((observer) => {
+      switch (event) {
+        case 'columns':
+          observer.onColumnsChange(this);
+          break;
+        case 'scrollable':
+          observer.onScrollableChange(this);
+          break;
+        default:
+          throw new Error(`Table Layout don't have event ${event}.`);
+      }
+    });
+  }
+}
+
+export default TableLayout;

packages/table/src/table.vue

@@ -0,0 +1,694 @@
+<template>
+  <div class="el-table"
+    :class="[{
+      'el-table--fit': fit,
+      'el-table--striped': stripe,
+      'el-table--border': border || isGroup,
+      'el-table--hidden': isHidden,
+      'el-table--group': isGroup,
+      'el-table--fluid-height': maxHeight,
+      'el-table--scrollable-x': layout.scrollX,
+      'el-table--scrollable-y': layout.scrollY,
+      'el-table--enable-row-hover': !store.states.isComplex,
+      'el-table--enable-row-transition': (store.states.data || []).length !== 0 && (store.states.data || []).length < 100
+    }, tableSize ? `el-table--${ tableSize }` : '']"
+    @mouseleave="handleMouseLeave($event)">
+    <div class="hidden-columns" ref="hiddenColumns"><slot></slot></div>
+    <div
+      v-if="showHeader"
+      v-mousewheel="handleHeaderFooterMousewheel"
+      class="el-table__header-wrapper"
+      ref="headerWrapper">
+      <table-header
+        ref="tableHeader"
+        :store="store"
+        :border="border"
+        :default-sort="defaultSort"
+        :style="{
+          width: layout.bodyWidth ? layout.bodyWidth + 'px' : ''
+        }">
+      </table-header>
+    </div>
+    <div
+      class="el-table__body-wrapper"
+      ref="bodyWrapper"
+      :class="[layout.scrollX ? `is-scrolling-${scrollPosition}` : 'is-scrolling-none']"
+      :style="[bodyHeight]">
+      <table-body
+        :context="context"
+        :store="store"
+        :stripe="stripe"
+        :row-class-name="rowClassName"
+        :row-style="rowStyle"
+        :highlight="highlightCurrentRow"
+        :style="{
+           width: bodyWidth
+        }">
+      </table-body>
+      <div
+        v-if="!data || data.length === 0"
+        class="el-table__empty-block"
+        ref="emptyBlock"
+        :style="emptyBlockStyle">
+        <span class="el-table__empty-text" >
+          <slot name="empty">{{ emptyText || t('el.table.emptyText') }}</slot>
+        </span>
+      </div>
+      <div
+        v-if="$slots.append"
+        class="el-table__append-wrapper"
+        ref="appendWrapper">
+        <slot name="append"></slot>
+      </div>
+    </div>
+    <div
+      v-if="showSummary"
+      v-show="data && data.length > 0"
+      v-mousewheel="handleHeaderFooterMousewheel"
+      class="el-table__footer-wrapper"
+      ref="footerWrapper">
+      <table-footer
+        :store="store"
+        :border="border"
+        :sum-text="sumText || t('el.table.sumText')"
+        :summary-method="summaryMethod"
+        :default-sort="defaultSort"
+        :style="{
+          width: layout.bodyWidth ? layout.bodyWidth + 'px' : ''
+        }">
+      </table-footer>
+    </div>
+    <div
+      v-if="fixedColumns.length > 0"
+      v-mousewheel="handleFixedMousewheel"
+      class="el-table__fixed"
+      ref="fixedWrapper"
+      :style="[{
+        width: layout.fixedWidth ? layout.fixedWidth + 'px' : ''
+      },
+      fixedHeight]">
+      <div
+        v-if="showHeader"
+        class="el-table__fixed-header-wrapper"
+        ref="fixedHeaderWrapper" >
+        <table-header
+          ref="fixedTableHeader"
+          fixed="left"
+          :border="border"
+          :store="store"
+          :style="{
+            width: bodyWidth
+          }"></table-header>
+      </div>
+      <div
+        class="el-table__fixed-body-wrapper"
+        ref="fixedBodyWrapper"
+        :style="[{
+          top: layout.headerHeight + 'px'
+        },
+        fixedBodyHeight]">
+        <table-body
+          fixed="left"
+          :store="store"
+          :stripe="stripe"
+          :highlight="highlightCurrentRow"
+          :row-class-name="rowClassName"
+          :row-style="rowStyle"
+          :style="{
+            width: bodyWidth
+          }">
+        </table-body>
+        <div
+          v-if="$slots.append"
+          class="el-table__append-gutter"
+          :style="{ height: layout.appendHeight + 'px'}"></div>
+      </div>
+      <div
+        v-if="showSummary"
+        v-show="data && data.length > 0"
+        class="el-table__fixed-footer-wrapper"
+        ref="fixedFooterWrapper">
+        <table-footer
+          fixed="left"
+          :border="border"
+          :sum-text="sumText || t('el.table.sumText')"
+          :summary-method="summaryMethod"
+          :store="store"
+          :style="{
+            width: bodyWidth
+          }"></table-footer>
+      </div>
+    </div>
+    <div
+      v-if="rightFixedColumns.length > 0"
+      v-mousewheel="handleFixedMousewheel"
+      class="el-table__fixed-right"
+      ref="rightFixedWrapper"
+      :style="[{
+        width: layout.rightFixedWidth ? layout.rightFixedWidth + 'px' : '',
+        right: layout.scrollY ? (border ? layout.gutterWidth : (layout.gutterWidth || 0)) + 'px' : ''
+      },
+      fixedHeight]">
+      <div v-if="showHeader"
+        class="el-table__fixed-header-wrapper"
+        ref="rightFixedHeaderWrapper">
+        <table-header
+          ref="rightFixedTableHeader"
+          fixed="right"
+          :border="border"
+          :store="store"
+          :style="{
+            width: bodyWidth
+          }"></table-header>
+      </div>
+      <div
+        class="el-table__fixed-body-wrapper"
+        ref="rightFixedBodyWrapper"
+        :style="[{
+          top: layout.headerHeight + 'px'
+        },
+        fixedBodyHeight]">
+        <table-body
+          fixed="right"
+          :store="store"
+          :stripe="stripe"
+          :row-class-name="rowClassName"
+          :row-style="rowStyle"
+          :highlight="highlightCurrentRow"
+          :style="{
+            width: bodyWidth
+          }">
+        </table-body>
+         <div
+          v-if="$slots.append"
+          class="el-table__append-gutter"
+          :style="{ height: layout.appendHeight + 'px' }"></div>
+      </div>
+      <div
+        v-if="showSummary"
+        v-show="data && data.length > 0"
+        class="el-table__fixed-footer-wrapper"
+        ref="rightFixedFooterWrapper">
+        <table-footer
+          fixed="right"
+          :border="border"
+          :sum-text="sumText || t('el.table.sumText')"
+          :summary-method="summaryMethod"
+          :store="store"
+          :style="{
+            width: bodyWidth
+          }"></table-footer>
+      </div>
+    </div>
+    <div
+      v-if="rightFixedColumns.length > 0"
+      class="el-table__fixed-right-patch"
+      ref="rightFixedPatch"
+      :style="{
+        width: layout.scrollY ? layout.gutterWidth + 'px' : '0',
+        height: layout.headerHeight + 'px'
+      }"></div>
+    <div class="el-table__column-resize-proxy" ref="resizeProxy" v-show="resizeProxyVisible"></div>
+  </div>
+</template>
+
+<script type="text/babel">
+  import ElCheckbox from 'element-ui/packages/checkbox';
+  import { debounce, throttle } from 'throttle-debounce';
+  import { addResizeListener, removeResizeListener } from 'element-ui/src/utils/resize-event';
+  import Mousewheel from 'element-ui/src/directives/mousewheel';
+  import Locale from 'element-ui/src/mixins/locale';
+  import Migrating from 'element-ui/src/mixins/migrating';
+  import { createStore, mapStates } from './store/helper';
+  import TableLayout from './table-layout';
+  import TableBody from './table-body';
+  import TableHeader from './table-header';
+  import TableFooter from './table-footer';
+  import { parseHeight } from './util';
+
+  let tableIdSeed = 1;
+
+  export default {
+    name: 'ElTable',
+
+    mixins: [Locale, Migrating],
+
+    directives: {
+      Mousewheel
+    },
+
+    props: {
+      data: {
+        type: Array,
+        default: function() {
+          return [];
+        }
+      },
+
+      size: String,
+
+      width: [String, Number],
+
+      height: [String, Number],
+
+      maxHeight: [String, Number],
+
+      fit: {
+        type: Boolean,
+        default: true
+      },
+
+      stripe: Boolean,
+
+      border: Boolean,
+
+      rowKey: [String, Function],
+
+      context: {},
+
+      showHeader: {
+        type: Boolean,
+        default: true
+      },
+
+      showSummary: Boolean,
+
+      sumText: String,
+
+      summaryMethod: Function,
+
+      rowClassName: [String, Function],
+
+      rowStyle: [Object, Function],
+
+      cellClassName: [String, Function],
+
+      cellStyle: [Object, Function],
+
+      headerRowClassName: [String, Function],
+
+      headerRowStyle: [Object, Function],
+
+      headerCellClassName: [String, Function],
+
+      headerCellStyle: [Object, Function],
+
+      highlightCurrentRow: Boolean,
+
+      currentRowKey: [String, Number],
+
+      emptyText: String,
+
+      expandRowKeys: Array,
+
+      defaultExpandAll: Boolean,
+
+      defaultSort: Object,
+
+      tooltipEffect: String,
+
+      spanMethod: Function,
+
+      selectOnIndeterminate: {
+        type: Boolean,
+        default: true
+      },
+
+      indent: {
+        type: Number,
+        default: 16
+      },
+
+      treeProps: {
+        type: Object,
+        default() {
+          return {
+            hasChildren: 'hasChildren',
+            children: 'children'
+          };
+        }
+      },
+
+      lazy: Boolean,
+
+      load: Function
+    },
+
+    components: {
+      TableHeader,
+      TableFooter,
+      TableBody,
+      ElCheckbox
+    },
+
+    methods: {
+      getMigratingConfig() {
+        return {
+          events: {
+            expand: 'expand is renamed to expand-change'
+          }
+        };
+      },
+
+      setCurrentRow(row) {
+        this.store.commit('setCurrentRow', row);
+      },
+
+      toggleRowSelection(row, selected) {
+        this.store.toggleRowSelection(row, selected, false);
+        this.store.updateAllSelected();
+      },
+
+      toggleRowExpansion(row, expanded) {
+        this.store.toggleRowExpansionAdapter(row, expanded);
+      },
+
+      clearSelection() {
+        this.store.clearSelection();
+      },
+
+      clearFilter(columnKeys) {
+        this.store.clearFilter(columnKeys);
+      },
+
+      clearSort() {
+        this.store.clearSort();
+      },
+
+      handleMouseLeave() {
+        this.store.commit('setHoverRow', null);
+        if (this.hoverState) this.hoverState = null;
+      },
+
+      updateScrollY() {
+        const changed = this.layout.updateScrollY();
+        if (changed) {
+          this.layout.notifyObservers('scrollable');
+          this.layout.updateColumnsWidth();
+        }
+      },
+
+      handleFixedMousewheel(event, data) {
+        const bodyWrapper = this.bodyWrapper;
+        if (Math.abs(data.spinY) > 0) {
+          const currentScrollTop = bodyWrapper.scrollTop;
+          if (data.pixelY < 0 && currentScrollTop !== 0) {
+            event.preventDefault();
+          }
+          if (data.pixelY > 0 && bodyWrapper.scrollHeight - bodyWrapper.clientHeight > currentScrollTop) {
+            event.preventDefault();
+          }
+          bodyWrapper.scrollTop += Math.ceil(data.pixelY / 5);
+        } else {
+          bodyWrapper.scrollLeft += Math.ceil(data.pixelX / 5);
+        }
+      },
+
+      handleHeaderFooterMousewheel(event, data) {
+        const { pixelX, pixelY } = data;
+        if (Math.abs(pixelX) >= Math.abs(pixelY)) {
+          this.bodyWrapper.scrollLeft += data.pixelX / 5;
+        }
+      },
+
+      // TODO 使用 CSS transform
+      syncPostion: throttle(20, function() {
+        const { scrollLeft, scrollTop, offsetWidth, scrollWidth } = this.bodyWrapper;
+        const { headerWrapper, footerWrapper, fixedBodyWrapper, rightFixedBodyWrapper } = this.$refs;
+        if (headerWrapper) headerWrapper.scrollLeft = scrollLeft;
+        if (footerWrapper) footerWrapper.scrollLeft = scrollLeft;
+        if (fixedBodyWrapper) fixedBodyWrapper.scrollTop = scrollTop;
+        if (rightFixedBodyWrapper) rightFixedBodyWrapper.scrollTop = scrollTop;
+        const maxScrollLeftPosition = scrollWidth - offsetWidth - 1;
+        if (scrollLeft >= maxScrollLeftPosition) {
+          this.scrollPosition = 'right';
+        } else if (scrollLeft === 0) {
+          this.scrollPosition = 'left';
+        } else {
+          this.scrollPosition = 'middle';
+        }
+      }),
+
+      bindEvents() {
+        this.bodyWrapper.addEventListener('scroll', this.syncPostion, { passive: true });
+        if (this.fit) {
+          addResizeListener(this.$el, this.resizeListener);
+        }
+      },
+
+      unbindEvents() {
+        this.bodyWrapper.removeEventListener('scroll', this.syncPostion, { passive: true });
+        if (this.fit) {
+          removeResizeListener(this.$el, this.resizeListener);
+        }
+      },
+
+      resizeListener() {
+        if (!this.$ready) return;
+        let shouldUpdateLayout = false;
+        const el = this.$el;
+        const { width: oldWidth, height: oldHeight } = this.resizeState;
+
+        const width = el.offsetWidth;
+        if (oldWidth !== width) {
+          shouldUpdateLayout = true;
+        }
+
+        const height = el.offsetHeight;
+        if ((this.height || this.shouldUpdateHeight) && oldHeight !== height) {
+          shouldUpdateLayout = true;
+        }
+
+        if (shouldUpdateLayout) {
+          this.resizeState.width = width;
+          this.resizeState.height = height;
+          this.doLayout();
+        }
+      },
+
+      doLayout() {
+        if (this.shouldUpdateHeight) {
+          this.layout.updateElsHeight();
+        }
+        this.layout.updateColumnsWidth();
+      },
+
+      sort(prop, order) {
+        this.store.commit('sort', { prop, order });
+      },
+
+      toggleAllSelection() {
+        this.store.commit('toggleAllSelection');
+      }
+
+    },
+
+    computed: {
+      tableSize() {
+        return this.size || (this.$ELEMENT || {}).size;
+      },
+
+      bodyWrapper() {
+        return this.$refs.bodyWrapper;
+      },
+
+      shouldUpdateHeight() {
+        return this.height ||
+          this.maxHeight ||
+          this.fixedColumns.length > 0 ||
+          this.rightFixedColumns.length > 0;
+      },
+
+      bodyWidth() {
+        const { bodyWidth, scrollY, gutterWidth } = this.layout;
+        return bodyWidth ? bodyWidth - (scrollY ? gutterWidth : 0) + 'px' : '';
+      },
+
+      bodyHeight() {
+        const { headerHeight = 0, bodyHeight, footerHeight = 0} = this.layout;
+        if (this.height) {
+          return {
+            height: bodyHeight ? bodyHeight + 'px' : ''
+          };
+        } else if (this.maxHeight) {
+          const maxHeight = parseHeight(this.maxHeight);
+          if (typeof maxHeight === 'number') {
+            return {
+              'max-height': (maxHeight - footerHeight - (this.showHeader ? headerHeight : 0)) + 'px'
+            };
+          }
+        }
+        return {};
+      },
+
+      fixedBodyHeight() {
+        if (this.height) {
+          return {
+            height: this.layout.fixedBodyHeight ? this.layout.fixedBodyHeight + 'px' : ''
+          };
+        } else if (this.maxHeight) {
+          let maxHeight = parseHeight(this.maxHeight);
+          if (typeof maxHeight === 'number') {
+            maxHeight = this.layout.scrollX ? maxHeight - this.layout.gutterWidth : maxHeight;
+            if (this.showHeader) {
+              maxHeight -= this.layout.headerHeight;
+            }
+            maxHeight -= this.layout.footerHeight;
+            return {
+              'max-height': maxHeight + 'px'
+            };
+          }
+        }
+        return {};
+      },
+
+      fixedHeight() {
+        if (this.maxHeight) {
+          if (this.showSummary) {
+            return {
+              bottom: 0
+            };
+          }
+          return {
+            bottom: (this.layout.scrollX && this.data.length) ? this.layout.gutterWidth + 'px' : ''
+          };
+        } else {
+          if (this.showSummary) {
+            return {
+              height: this.layout.tableHeight ? this.layout.tableHeight + 'px' : ''
+            };
+          }
+          return {
+            height: this.layout.viewportHeight ? this.layout.viewportHeight + 'px' : ''
+          };
+        }
+      },
+
+      emptyBlockStyle() {
+        if (this.data && this.data.length) return null;
+        let height = '100%';
+        if (this.layout.appendHeight) {
+          height = `calc(100% - ${this.layout.appendHeight}px)`;
+        }
+        return {
+          width: this.bodyWidth,
+          height
+        };
+      },
+
+      ...mapStates({
+        selection: 'selection',
+        columns: 'columns',
+        tableData: 'data',
+        fixedColumns: 'fixedColumns',
+        rightFixedColumns: 'rightFixedColumns'
+      })
+    },
+
+    watch: {
+      height: {
+        immediate: true,
+        handler(value) {
+          this.layout.setHeight(value);
+        }
+      },
+
+      maxHeight: {
+        immediate: true,
+        handler(value) {
+          this.layout.setMaxHeight(value);
+        }
+      },
+
+      currentRowKey: {
+        immediate: true,
+        handler(value) {
+          if (!this.rowKey) return;
+          this.store.setCurrentRowKey(value);
+        }
+      },
+
+      data: {
+        immediate: true,
+        handler(value) {
+          this.store.commit('setData', value);
+        }
+      },
+
+      expandRowKeys: {
+        immediate: true,
+        handler(newVal) {
+          if (newVal) {
+            this.store.setExpandRowKeysAdapter(newVal);
+          }
+        }
+      }
+    },
+
+    created() {
+      this.tableId = 'el-table_' + tableIdSeed++;
+      this.debouncedUpdateLayout = debounce(50, () => this.doLayout());
+    },
+
+    mounted() {
+      this.bindEvents();
+      this.store.updateColumns();
+      this.doLayout();
+
+      this.resizeState = {
+        width: this.$el.offsetWidth,
+        height: this.$el.offsetHeight
+      };
+
+      // init filters
+      this.store.states.columns.forEach(column => {
+        if (column.filteredValue && column.filteredValue.length) {
+          this.store.commit('filterChange', {
+            column,
+            values: column.filteredValue,
+            silent: true
+          });
+        }
+      });
+
+      this.$ready = true;
+    },
+
+    destroyed() {
+      this.unbindEvents();
+    },
+
+    data() {
+      const { hasChildren = 'hasChildren', children = 'children' } = this.treeProps;
+      this.store = createStore(this, {
+        rowKey: this.rowKey,
+        defaultExpandAll: this.defaultExpandAll,
+        selectOnIndeterminate: this.selectOnIndeterminate,
+        // TreeTable 的相关配置
+        indent: this.indent,
+        lazy: this.lazy,
+        lazyColumnIdentifier: hasChildren,
+        childrenColumnName: children
+      });
+      const layout = new TableLayout({
+        store: this.store,
+        table: this,
+        fit: this.fit,
+        showHeader: this.showHeader
+      });
+      return {
+        layout,
+        isHidden: false,
+        renderExpanded: null,
+        resizeProxyVisible: false,
+        resizeState: {
+          width: null,
+          height: null
+        },
+        // 是否拥有多级表头
+        isGroup: false,
+        scrollPosition: 'left'
+      };
+    }
+  };
+</script>

packages/table/src/util.js

@@ -0,0 +1,255 @@
+import { getValueByPath } from 'element-ui/src/utils/util';
+
+export const getCell = function(event) {
+  let cell = event.target;
+
+  while (cell && cell.tagName.toUpperCase() !== 'HTML') {
+    if (cell.tagName.toUpperCase() === 'TD') {
+      return cell;
+    }
+    cell = cell.parentNode;
+  }
+
+  return null;
+};
+
+const isObject = function(obj) {
+  return obj !== null && typeof obj === 'object';
+};
+
+export const orderBy = function(array, sortKey, reverse, sortMethod, sortBy) {
+  if (!sortKey && !sortMethod && (!sortBy || Array.isArray(sortBy) && !sortBy.length)) {
+    return array;
+  }
+  if (typeof reverse === 'string') {
+    reverse = reverse === 'descending' ? -1 : 1;
+  } else {
+    reverse = (reverse && reverse < 0) ? -1 : 1;
+  }
+  const getKey = sortMethod ? null : function(value, index) {
+    if (sortBy) {
+      if (!Array.isArray(sortBy)) {
+        sortBy = [sortBy];
+      }
+      return sortBy.map(function(by) {
+        if (typeof by === 'string') {
+          return getValueByPath(value, by);
+        } else {
+          return by(value, index, array);
+        }
+      });
+    }
+    if (sortKey !== '$key') {
+      if (isObject(value) && '$value' in value) value = value.$value;
+    }
+    return [isObject(value) ? getValueByPath(value, sortKey) : value];
+  };
+  const compare = function(a, b) {
+    if (sortMethod) {
+      return sortMethod(a.value, b.value);
+    }
+    for (let i = 0, len = a.key.length; i < len; i++) {
+      if (a.key[i] < b.key[i]) {
+        return -1;
+      }
+      if (a.key[i] > b.key[i]) {
+        return 1;
+      }
+    }
+    return 0;
+  };
+  return array.map(function(value, index) {
+    return {
+      value: value,
+      index: index,
+      key: getKey ? getKey(value, index) : null
+    };
+  }).sort(function(a, b) {
+    let order = compare(a, b);
+    if (!order) {
+      // make stable https://en.wikipedia.org/wiki/Sorting_algorithm#Stability
+      order = a.index - b.index;
+    }
+    return order * reverse;
+  }).map(item => item.value);
+};
+
+export const getColumnById = function(table, columnId) {
+  let column = null;
+  table.columns.forEach(function(item) {
+    if (item.id === columnId) {
+      column = item;
+    }
+  });
+  return column;
+};
+
+export const getColumnByKey = function(table, columnKey) {
+  let column = null;
+  for (let i = 0; i < table.columns.length; i++) {
+    const item = table.columns[i];
+    if (item.columnKey === columnKey) {
+      column = item;
+      break;
+    }
+  }
+  return column;
+};
+
+export const getColumnByCell = function(table, cell) {
+  const matches = (cell.className || '').match(/el-table_[^\s]+/gm);
+  if (matches) {
+    return getColumnById(table, matches[0]);
+  }
+  return null;
+};
+
+export const getRowIdentity = (row, rowKey) => {
+  if (!row) throw new Error('row is required when get row identity');
+  if (typeof rowKey === 'string') {
+    if (rowKey.indexOf('.') < 0) {
+      return row[rowKey];
+    }
+    let key = rowKey.split('.');
+    let current = row;
+    for (let i = 0; i < key.length; i++) {
+      current = current[key[i]];
+    }
+    return current;
+  } else if (typeof rowKey === 'function') {
+    return rowKey.call(null, row);
+  }
+};
+
+export const getKeysMap = function(array, rowKey) {
+  const arrayMap = {};
+  (array || []).forEach((row, index) => {
+    arrayMap[getRowIdentity(row, rowKey)] = { row, index };
+  });
+  return arrayMap;
+};
+
+function hasOwn(obj, key) {
+  return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
+export function mergeOptions(defaults, config) {
+  const options = {};
+  let key;
+  for (key in defaults) {
+    options[key] = defaults[key];
+  }
+  for (key in config) {
+    if (hasOwn(config, key)) {
+      const value = config[key];
+      if (typeof value !== 'undefined') {
+        options[key] = value;
+      }
+    }
+  }
+  return options;
+}
+
+export function parseWidth(width) {
+  if (width !== undefined) {
+    width = parseInt(width, 10);
+    if (isNaN(width)) {
+      width = null;
+    }
+  }
+  return width;
+}
+
+export function parseMinWidth(minWidth) {
+  if (typeof minWidth !== 'undefined') {
+    minWidth = parseWidth(minWidth);
+    if (isNaN(minWidth)) {
+      minWidth = 80;
+    }
+  }
+  return minWidth;
+};
+
+export function parseHeight(height) {
+  if (typeof height === 'number') {
+    return height;
+  }
+  if (typeof height === 'string') {
+    if (/^\d+(?:px)?$/.test(height)) {
+      return parseInt(height, 10);
+    } else {
+      return height;
+    }
+  }
+  return null;
+}
+
+// https://github.com/reduxjs/redux/blob/master/src/compose.js
+export function compose(...funcs) {
+  if (funcs.length === 0) {
+    return arg => arg;
+  }
+  if (funcs.length === 1) {
+    return funcs[0];
+  }
+  return funcs.reduce((a, b) => (...args) => a(b(...args)));
+}
+
+export function toggleRowStatus(statusArr, row, newVal) {
+  let changed = false;
+  const index = statusArr.indexOf(row);
+  const included = index !== -1;
+
+  const addRow = () => {
+    statusArr.push(row);
+    changed = true;
+  };
+  const removeRow = () => {
+    statusArr.splice(index, 1);
+    changed = true;
+  };
+
+  if (typeof newVal === 'boolean') {
+    if (newVal && !included) {
+      addRow();
+    } else if (!newVal && included) {
+      removeRow();
+    }
+  } else {
+    if (included) {
+      removeRow();
+    } else {
+      addRow();
+    }
+  }
+  return changed;
+}
+
+export function walkTreeNode(root, cb, childrenKey = 'children', lazyKey = 'hasChildren') {
+  const isNil = (array) => !(Array.isArray(array) && array.length);
+
+  function _walker(parent, children, level) {
+    cb(parent, children, level);
+    children.forEach(item => {
+      if (item[lazyKey]) {
+        cb(item, null, level + 1);
+        return;
+      }
+      const children = item[childrenKey];
+      if (!isNil(children)) {
+        _walker(item, children, level + 1);
+      }
+    });
+  }
+
+  root.forEach(item => {
+    if (item[lazyKey]) {
+      cb(item, null, 0);
+      return;
+    }
+    const children = item[childrenKey];
+    if (!isNil(children)) {
+      _walker(item, children, 0);
+    }
+  });
+}