592 lines
16 KiB
Markdown
592 lines
16 KiB
Markdown
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## Select
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When there are plenty of options, use a drop-down menu to display and select desired ones.
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### Basic usage
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:::demo `v-model` is the value of `el-option` that is currently selected.
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```html
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<template>
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<el-select v-model="value" placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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value: 'Option1',
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label: 'Option1'
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}, {
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value: 'Option2',
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label: 'Option2'
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}, {
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value: 'Option3',
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label: 'Option3'
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}, {
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value: 'Option4',
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label: 'Option4'
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}, {
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value: 'Option5',
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label: 'Option5'
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Disabled option
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:::demo Set the value of `disabled` in `el-option` to `true` to disable this option.
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```html
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<template>
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<el-select v-model="value" placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value"
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:disabled="item.disabled">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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value: 'Option1',
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label: 'Option1'
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}, {
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value: 'Option2',
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label: 'Option2',
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disabled: true
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}, {
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value: 'Option3',
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label: 'Option3'
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}, {
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value: 'Option4',
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label: 'Option4'
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}, {
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value: 'Option5',
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label: 'Option5'
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Disabled select
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Disable the whole component.
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:::demo Set `disabled` of `el-select` to make it disabled.
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```html
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<template>
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<el-select v-model="value" disabled placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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value: 'Option1',
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label: 'Option1'
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}, {
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value: 'Option2',
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label: 'Option2'
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}, {
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value: 'Option3',
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label: 'Option3'
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}, {
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value: 'Option4',
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label: 'Option4'
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}, {
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value: 'Option5',
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label: 'Option5'
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Clearable single select
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You can clear Select using a clear icon.
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:::demo Set `clearable` attribute for `el-select` and a clear icon will appear. Note that `clearable` is only for single select.
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```html
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<template>
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<el-select v-model="value" clearable placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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value: 'Option1',
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label: 'Option1'
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}, {
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value: 'Option2',
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label: 'Option2'
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}, {
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value: 'Option3',
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label: 'Option3'
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}, {
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value: 'Option4',
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label: 'Option4'
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}, {
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value: 'Option5',
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label: 'Option5'
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Basic multiple select
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Multiple select uses tags to display selected options.
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:::demo Set `multiple` attribute for `el-select` to enable multiple mode. In this case, the value of `v-model` will be an array of selected options. By default the selected options will be displayed as Tags. You can collapse them to a text by using `collapse-tags` attribute.
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```html
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<template>
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<el-select v-model="value1" multiple placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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<el-select
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v-model="value2"
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multiple
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collapse-tags
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style="margin-left: 20px;"
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placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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value: 'Option1',
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label: 'Option1'
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}, {
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value: 'Option2',
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label: 'Option2'
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}, {
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value: 'Option3',
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label: 'Option3'
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}, {
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value: 'Option4',
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label: 'Option4'
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}, {
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value: 'Option5',
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label: 'Option5'
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}],
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value1: [],
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value2: []
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}
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}
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}
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</script>
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```
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:::
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### Custom template
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You can customize HTML templates for options.
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:::demo Insert customized HTML templates into the slot of `el-option`.
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```html
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<template>
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<el-select v-model="value" placeholder="Select">
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<el-option
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v-for="item in cities"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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<span style="float: left">{{ item.label }}</span>
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<span style="float: right; color: #8492a6; font-size: 13px">{{ item.value }}</span>
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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cities: [{
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value: 'Beijing',
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label: 'Beijing'
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}, {
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value: 'Shanghai',
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label: 'Shanghai'
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}, {
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value: 'Nanjing',
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label: 'Nanjing'
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}, {
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value: 'Chengdu',
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label: 'Chengdu'
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}, {
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value: 'Shenzhen',
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label: 'Shenzhen'
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}, {
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value: 'Guangzhou',
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label: 'Guangzhou'
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Grouping
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Display options in groups.
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:::demo Use `el-option-group` to group the options, and its `label` attribute stands for the name of the group.
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```html
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<template>
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<el-select v-model="value" placeholder="Select">
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<el-option-group
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v-for="group in options"
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:key="group.label"
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:label="group.label">
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<el-option
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v-for="item in group.options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-option-group>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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label: 'Popular cities',
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options: [{
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value: 'Shanghai',
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label: 'Shanghai'
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}, {
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value: 'Beijing',
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label: 'Beijing'
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}]
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}, {
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label: 'City name',
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options: [{
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value: 'Chengdu',
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label: 'Chengdu'
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}, {
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value: 'Shenzhen',
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label: 'Shenzhen'
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}, {
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value: 'Guangzhou',
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label: 'Guangzhou'
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}, {
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value: 'Dalian',
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label: 'Dalian'
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}]
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Option filtering
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You can filter options for your desired ones.
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:::demo Adding `filterable` to `el-select` enables filtering. By default, Select will find all the options whose `label` attribute contains the input value. If you prefer other filtering strategies, you can pass the `filter-method`. `filter-method` is a `Function` that gets called when the input value changes, and its parameter is the current input value.
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```html
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<template>
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<el-select v-model="value" filterable placeholder="Select">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [{
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value: 'Option1',
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label: 'Option1'
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}, {
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value: 'Option2',
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label: 'Option2'
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}, {
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value: 'Option3',
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label: 'Option3'
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}, {
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value: 'Option4',
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label: 'Option4'
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}, {
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value: 'Option5',
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label: 'Option5'
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}],
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value: ''
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}
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}
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}
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</script>
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```
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:::
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### Remote Search
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Enter keywords and search data from server.
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:::demo Set the value of `filterable` and `remote` with `true` to enable remote search, and you should pass the `remote-method`. `remote-method` is a `Function` that gets called when the input value changes, and its parameter is the current input value. Note that if `el-option` is rendered with the `v-for` directive, you should add the `key` attribute for `el-option`. Its value needs to be unique, such as `item.value` in the following example.
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```html
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<template>
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||
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<el-select
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v-model="value"
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multiple
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filterable
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remote
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reserve-keyword
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placeholder="Please enter a keyword"
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:remote-method="remoteMethod"
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:loading="loading">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.label"
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:value="item.value">
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</el-option>
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</el-select>
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</template>
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<script>
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export default {
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data() {
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return {
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options: [],
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value: [],
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list: [],
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loading: false,
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states: ["Alabama", "Alaska", "Arizona",
|
||
|
|
"Arkansas", "California", "Colorado",
|
||
|
|
"Connecticut", "Delaware", "Florida",
|
||
|
|
"Georgia", "Hawaii", "Idaho", "Illinois",
|
||
|
|
"Indiana", "Iowa", "Kansas", "Kentucky",
|
||
|
|
"Louisiana", "Maine", "Maryland",
|
||
|
|
"Massachusetts", "Michigan", "Minnesota",
|
||
|
|
"Mississippi", "Missouri", "Montana",
|
||
|
|
"Nebraska", "Nevada", "New Hampshire",
|
||
|
|
"New Jersey", "New Mexico", "New York",
|
||
|
|
"North Carolina", "North Dakota", "Ohio",
|
||
|
|
"Oklahoma", "Oregon", "Pennsylvania",
|
||
|
|
"Rhode Island", "South Carolina",
|
||
|
|
"South Dakota", "Tennessee", "Texas",
|
||
|
|
"Utah", "Vermont", "Virginia",
|
||
|
|
"Washington", "West Virginia", "Wisconsin",
|
||
|
|
"Wyoming"]
|
||
|
|
}
|
||
|
|
},
|
||
|
|
mounted() {
|
||
|
|
this.list = this.states.map(item => {
|
||
|
|
return { value: `value:${item}`, label: `label:${item}` };
|
||
|
|
});
|
||
|
|
},
|
||
|
|
methods: {
|
||
|
|
remoteMethod(query) {
|
||
|
|
if (query !== '') {
|
||
|
|
this.loading = true;
|
||
|
|
setTimeout(() => {
|
||
|
|
this.loading = false;
|
||
|
|
this.options = this.list.filter(item => {
|
||
|
|
return item.label.toLowerCase()
|
||
|
|
.indexOf(query.toLowerCase()) > -1;
|
||
|
|
});
|
||
|
|
}, 200);
|
||
|
|
} else {
|
||
|
|
this.options = [];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
```
|
||
|
|
:::
|
||
|
|
|
||
|
|
### Create new items
|
||
|
|
Create and select new items that are not included in select options
|
||
|
|
:::demo By using the `allow-create` attribute, users can create new items by typing in the input box. Note that for `allow-create` to work, `filterable` must be `true`. This example also demonstrates `default-first-option`. When this attribute is set to `true`, you can select the first option in the current option list by hitting enter without having to navigate with mouse or arrow keys.
|
||
|
|
```html
|
||
|
|
<template>
|
||
|
|
<el-select
|
||
|
|
v-model="value"
|
||
|
|
multiple
|
||
|
|
filterable
|
||
|
|
allow-create
|
||
|
|
default-first-option
|
||
|
|
placeholder="Choose tags for your article">
|
||
|
|
<el-option
|
||
|
|
v-for="item in options"
|
||
|
|
:key="item.value"
|
||
|
|
:label="item.label"
|
||
|
|
:value="item.value">
|
||
|
|
</el-option>
|
||
|
|
</el-select>
|
||
|
|
</template>
|
||
|
|
|
||
|
|
<script>
|
||
|
|
export default {
|
||
|
|
data() {
|
||
|
|
return {
|
||
|
|
options: [{
|
||
|
|
value: 'HTML',
|
||
|
|
label: 'HTML'
|
||
|
|
}, {
|
||
|
|
value: 'CSS',
|
||
|
|
label: 'CSS'
|
||
|
|
}, {
|
||
|
|
value: 'JavaScript',
|
||
|
|
label: 'JavaScript'
|
||
|
|
}],
|
||
|
|
value: []
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
```
|
||
|
|
:::
|
||
|
|
|
||
|
|
:::tip
|
||
|
|
If the binding value of Select is an object, make sure to assign `value-key` as its unique identity key name.
|
||
|
|
:::
|
||
|
|
|
||
|
|
### Select Attributes
|
||
|
|
| Attribute | Description | Type | Accepted Values | Default |
|
||
|
|
|---------- |-------------- |---------- |-------------------------------- |-------- |
|
||
|
|
| value / v-model | binding value | boolean / string / number | — | — |
|
||
|
|
| multiple | whether multiple-select is activated | boolean | — | false |
|
||
|
|
| disabled | whether Select is disabled | boolean | — | false |
|
||
|
|
| value-key | unique identity key name for value, required when value is an object | string | — | value |
|
||
|
|
| size | size of Input | string | large/small/mini | — |
|
||
|
|
| clearable | whether select can be cleared | boolean | — | false |
|
||
|
|
| collapse-tags | whether to collapse tags to a text when multiple selecting | boolean | — | false |
|
||
|
|
| multiple-limit | maximum number of options user can select when `multiple` is `true`. No limit when set to 0 | number | — | 0 |
|
||
|
|
| name | the name attribute of select input | string | — | — |
|
||
|
|
| autocomplete | the autocomplete attribute of select input | string | — | off |
|
||
|
|
| auto-complete | @DEPRECATED in next major version | string | — | off |
|
||
|
|
| placeholder | placeholder | string | — | Select |
|
||
|
|
| filterable | whether Select is filterable | boolean | — | false |
|
||
|
|
| allow-create | whether creating new items is allowed. To use this, `filterable` must be true | boolean | — | false |
|
||
|
|
| filter-method | custom filter method | function | — | — |
|
||
|
|
| remote | whether options are loaded from server | boolean | — | false |
|
||
|
|
| remote-method | custom remote search method | function | — | — |
|
||
|
|
| loading | whether Select is loading data from server | boolean | — | false |
|
||
|
|
| loading-text | displayed text while loading data from server | string | — | Loading |
|
||
|
|
| no-match-text | displayed text when no data matches the filtering query, you can also use slot `empty` | string | — | No matching data |
|
||
|
|
| no-data-text | displayed text when there is no options, you can also use slot `empty` | string | — | No data |
|
||
|
|
| popper-class | custom class name for Select's dropdown | string | — | — |
|
||
|
|
| reserve-keyword | when `multiple` and `filter` is true, whether to reserve current keyword after selecting an option | boolean | — | false |
|
||
|
|
| default-first-option | select first matching option on enter key. Use with `filterable` or `remote` | boolean | - | false |
|
||
|
|
| popper-append-to-body| whether to append the popper menu to body. If the positioning of the popper is wrong, you can try to set this prop to false | boolean | - | true |
|
||
|
|
| automatic-dropdown | for non-filterable Select, this prop decides if the option menu pops up when the input is focused | boolean | - | false |
|
||
|
|
|
||
|
|
### Select Events
|
||
|
|
| Event Name | Description | Parameters |
|
||
|
|
|---------|---------|---------|
|
||
|
|
| change | triggers when the selected value changes | current selected value |
|
||
|
|
| visible-change | triggers when the dropdown appears/disappears | true when it appears, and false otherwise |
|
||
|
|
| remove-tag | triggers when a tag is removed in multiple mode | removed tag value |
|
||
|
|
| clear | triggers when the clear icon is clicked in a clearable Select | — |
|
||
|
|
| blur | triggers when Input blurs | (event: Event) |
|
||
|
|
| focus | triggers when Input focuses | (event: Event) |
|
||
|
|
|
||
|
|
### Select Slots
|
||
|
|
| Name | Description |
|
||
|
|
|---------|-------------|
|
||
|
|
| — | Option component list |
|
||
|
|
| prefix | content as Select prefix |
|
||
|
|
| empty | content when there is no options |
|
||
|
|
|
||
|
|
### Option Group Attributes
|
||
|
|
| Attribute | Description | Type | Accepted Values | Default |
|
||
|
|
|---------- |-------------- |---------- |-------------------------------- |-------- |
|
||
|
|
| label | name of the group | string | — | — |
|
||
|
|
| disabled | whether to disable all options in this group | boolean | — | false |
|
||
|
|
|
||
|
|
### Option Attributes
|
||
|
|
| Attribute | Description | Type | Accepted Values | Default |
|
||
|
|
|---------- |-------------- |---------- |-------------------------------- |-------- |
|
||
|
|
| value | value of option | string/number/object | — | — |
|
||
|
|
| label | label of option, same as `value` if omitted | string/number | — | — |
|
||
|
|
| disabled | whether option is disabled | boolean | — | false |
|
||
|
|
|
||
|
|
### Methods
|
||
|
|
| Method | Description | Parameters |
|
||
|
|
|------|--------|-------|
|
||
|
|
| focus | focus the Input component | - |
|
||
|
|
| blur | blur the Input component, and hide the dropdown | - |
|