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packages/alert/index.js

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

packages/alert/src/main.vue

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+<template>
+  <transition name="el-alert-fade">
+    <div
+      class="el-alert"
+      :class="[typeClass, center ? 'is-center' : '', 'is-' + effect]"
+      v-show="visible"
+      role="alert"
+    >
+      <i class="el-alert__icon" :class="[ iconClass, isBigIcon ]" v-if="showIcon"></i>
+      <div class="el-alert__content">
+        <span class="el-alert__title" :class="[ isBoldTitle ]" v-if="title || $slots.title">
+          <slot name="title">{{ title }}</slot>
+        </span>
+        <p class="el-alert__description" v-if="$slots.default && !description"><slot></slot></p>
+        <p class="el-alert__description" v-if="description && !$slots.default">{{ description }}</p>
+        <i class="el-alert__closebtn" :class="{ 'is-customed': closeText !== '', 'el-icon-close': closeText === '' }" v-show="closable" @click="close()">{{closeText}}</i>
+      </div>
+    </div>
+  </transition>
+</template>
+
+<script type="text/babel">
+  const TYPE_CLASSES_MAP = {
+    'success': 'el-icon-success',
+    'warning': 'el-icon-warning',
+    'error': 'el-icon-error'
+  };
+  export default {
+    name: 'ElAlert',
+
+    props: {
+      title: {
+        type: String,
+        default: ''
+      },
+      description: {
+        type: String,
+        default: ''
+      },
+      type: {
+        type: String,
+        default: 'info'
+      },
+      closable: {
+        type: Boolean,
+        default: true
+      },
+      closeText: {
+        type: String,
+        default: ''
+      },
+      showIcon: Boolean,
+      center: Boolean,
+      effect: {
+        type: String,
+        default: 'light',
+        validator: function(value) {
+          return ['light', 'dark'].indexOf(value) !== -1;
+        }
+      }
+    },
+
+    data() {
+      return {
+        visible: true
+      };
+    },
+
+    methods: {
+      close() {
+        this.visible = false;
+        this.$emit('close');
+      }
+    },
+
+    computed: {
+      typeClass() {
+        return `el-alert--${ this.type }`;
+      },
+
+      iconClass() {
+        return TYPE_CLASSES_MAP[this.type] || 'el-icon-info';
+      },
+
+      isBigIcon() {
+        return this.description || this.$slots.default ? 'is-big' : '';
+      },
+
+      isBoldTitle() {
+        return this.description || this.$slots.default ? 'is-bold' : '';
+      }
+    }
+  };
+</script>