mirror of https://github.com/ElemeFE/element
261 lines
7.8 KiB
Markdown
261 lines
7.8 KiB
Markdown
<script>
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const cityOptions = ['上海', '北京', '广州', '深圳'];
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module.exports = {
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data() {
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return {
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checkList: ['选中且禁用','复选框 A'],
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// checkList2: ['复选框 A'],
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checked: true,
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checked1: false,
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checked2: true,
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isValid: '可用',
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checkAll: false,
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cities: cityOptions,
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checkedCities: ['上海', '北京'],
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checkedCities1: ['上海', '北京'],
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isIndeterminate: true,
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checkboxGroup1: ['上海'],
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checkboxGroup2: ['北京'],
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checkboxGroup3: ['广州']
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};
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},
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methods: {
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handleChange(ev) {
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console.log(ev);
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},
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handleCheckAllChange(event) {
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this.checkedCities = event.target.checked ? cityOptions : [];
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this.isIndeterminate = false;
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},
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handleCheckedCitiesChange(value) {
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let checkedCount = value.length;
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this.checkAll = checkedCount === this.cities.length;
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this.isIndeterminate = checkedCount > 0 && checkedCount < this.cities.length;
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}
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}
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};
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</script>
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<style>
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.demo-box.demo-checkbox {
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.checkbox {
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margin-right: 5px;
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& + .checkbox {
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margin-left: 10px;
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}
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}
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}
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</style>
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## Checkbox 多选框
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一组备选项中进行多选
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### 基础用法
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单独使用可以表示两种状态之间的切换，写在标签中的内容为 checkbox 按钮后的介绍。
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:::demo 在`el-checkbox`元素中定义`v-model`绑定变量，单一的`checkbox`中，默认绑定变量的值会是`Boolean`，选中为`true`。
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```html
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<template>
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<!-- `checked` 为 true 或 false -->
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<el-checkbox v-model="checked">备选项</el-checkbox>
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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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checked: true
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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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### 禁用状态
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多选框不可用状态。
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::: demo 设置`disabled`属性即可。
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```html
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<template>
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<el-checkbox v-model="checked1" disabled>备选项1</el-checkbox>
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<el-checkbox v-model="checked2" disabled>备选项</el-checkbox>
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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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checked1: false,
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checked2: true
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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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### 多选框组
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适用于多个勾选框绑定到同一个数组的情景，通过是否勾选来表示这一组选项中选中的项。
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:::demo `checkbox-group`元素能把多个 checkbox 管理为一组，只需要在 Group 中使用`v-model`绑定`Array`类型的变量即可。 `el-checkbox` 的 `label`属性是该 checkbox 对应的值，若该标签中无内容，则该属性也充当 checkbox 按钮后的介绍。`label`与数组中的元素值相对应，如果存在指定的值则为选中状态，否则为不选中。
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```html
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<template>
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<el-checkbox-group v-model="checkList">
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<el-checkbox label="复选框 A"></el-checkbox>
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<el-checkbox label="复选框 B"></el-checkbox>
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<el-checkbox label="复选框 C"></el-checkbox>
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<el-checkbox label="禁用" disabled></el-checkbox>
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<el-checkbox label="选中且禁用" disabled></el-checkbox>
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</el-checkbox-group>
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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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checkList: ['选中且禁用','复选框 A']
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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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### indeterminate 状态
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`indeterminate` 属性用以表示 checkbox 的不确定状态，一般用于实现全选的效果
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:::demo
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```html
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<template>
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<el-checkbox :indeterminate="isIndeterminate" v-model="checkAll" @change="handleCheckAllChange">全选</el-checkbox>
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<div style="margin: 15px 0;"></div>
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<el-checkbox-group v-model="checkedCities" @change="handleCheckedCitiesChange">
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<el-checkbox v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox>
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</el-checkbox-group>
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</template>
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<script>
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const cityOptions = ['上海', '北京', '广州', '深圳'];
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export default {
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data() {
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return {
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checkAll: true,
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checkedCities: ['上海', '北京'],
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cities: cityOptions,
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isIndeterminate: true
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};
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},
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methods: {
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handleCheckAllChange(event) {
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this.checkedCities = event.target.checked ? cityOptions : [];
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this.isIndeterminate = false;
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},
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handleCheckedCitiesChange(value) {
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let checkedCount = value.length;
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this.checkAll = checkedCount === this.cities.length;
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this.isIndeterminate = checkedCount > 0 && checkedCount < this.cities.length;
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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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### 可选项目数量的限制
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使用 `min` 和 `max` 属性能够限制可以被勾选的项目的数量。
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:::demo
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```html
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<template>
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<el-checkbox-group
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v-model="checkedCities1"
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:min="1"
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:max="2">
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<el-checkbox v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox>
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</el-checkbox-group>
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</template>
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<script>
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const cityOptions = ['上海', '北京', '广州', '深圳'];
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export default {
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data() {
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return {
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checkedCities1: ['上海', '北京'],
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cities: cityOptions
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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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### 按钮样式
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按钮样式的多选组合。
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:::demo 只需要把`el-checkbox`元素替换为`el-checkbox-button`元素即可。此外，Element 还提供了`size`属性，支持`large`和`small`两种。
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```html
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<template>
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<div style="margin: 15px 0;"></div>
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<el-checkbox-group v-model="checkboxGroup1">
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<el-checkbox-button v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox-button>
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</el-checkbox-group>
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<div style="margin: 15px 0;"></div>
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<el-checkbox-group v-model="checkboxGroup2" size="small">
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<el-checkbox-button v-for="city in cities" :label="city" :disabled="city === '深圳'" :key="city">{{city}}</el-checkbox-button>
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</el-checkbox-group>
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<div style="margin: 15px 0;"></div>
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<el-checkbox-group v-model="checkboxGroup3" size="large" fill="#324057" text-color="#a4aebd" :min="1" :max="3">
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<el-checkbox-button v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox-button>
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</el-checkbox-group>
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</template>
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<script>
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const cityOptions = ['上海', '北京', '广州', '深圳'];
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export default {
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data () {
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return {
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checkboxGroup1: ['上海'],
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checkboxGroup2: ['北京'],
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checkboxGroup3: ['广州'],
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cities: cityOptions
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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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### Checkbox Attributes
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| 参数 | 说明 | 类型 | 可选值 | 默认值 |
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|---------- |-------- |---------- |------------- |-------- |
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| label | 选中状态的值（只有在`checkbox-group`或者绑定对象类型为`array`时有效）| string | — | — |
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| true-label | 选中时的值 | string, number | — | — |
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| false-label | 没有选中时的值 | string, number | — | — |
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| name | 原生 name 属性 | string | — | — |
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| disabled | 按钮禁用 | boolean | — | false |
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| checked | 当前是否勾选 | boolean | — | false |
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| indeterminate | 设置 indeterminate 状态，只负责样式控制 | boolean | — | false |
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### Checkbox-group Attributes
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| 参数 | 说明 | 类型 | 可选值 | 默认值 |
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|---------- |-------- |---------- |------------- |-------- |
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| size | Checkbox 按钮组尺寸 | string | large, small | — |
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| fill | 按钮激活时的填充色和边框色 | string | — | #20a0ff |
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| text-color | 按钮激活时的文本颜色 | string | — | #ffffff |
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| min | 可被勾选的 checkbox 的最大数量 | number | — | — |
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| max | 可被勾选的 checkbox 的最小数量 | number | — | — |
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### Checkbox-group Events
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| 事件名称 | 说明 | 回调参数 |
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|---------- |-------- |---------- |
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| change | 当绑定值变化时触发的事件 | event 事件对象 |
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