Checkbox 多选框

一组备选项中进行多选

基础用法

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。

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。

<template>
  <div>
    <el-checkbox v-model="checked1" label="备选项1"></el-checkbox>
    <el-checkbox v-model="checked2" label="备选项2"></el-checkbox>
  </div>
  <div>
    <el-checkbox v-model="checked3" label="备选项1" size="medium"></el-checkbox>
    <el-checkbox v-model="checked4" label="备选项2" size="medium"></el-checkbox>
  </div>
  <div>
    <el-checkbox v-model="checked5" label="备选项1" size="small"></el-checkbox>
    <el-checkbox v-model="checked6" label="备选项2" size="small"></el-checkbox>
  </div>
  <div>
    <el-checkbox v-model="checked7" label="备选项1" size="mini"></el-checkbox>
    <el-checkbox v-model="checked8" label="备选项2" size="mini"></el-checkbox>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        checked1: true,
        checked2: false,
        checked3: false,
        checked4: false,
        checked5: false,
        checked6: false,
        checked7: false,
        checked8: false,
      }
    },
  }
</script>

禁用状态

多选框不可用状态。

设置disabled属性即可。

indeterminate 状态

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

全选 上海 北京 广州 深圳

<template>
  <el-checkbox v-model="checked1" disabled>备选项1</el-checkbox>
  <el-checkbox v-model="checked2" disabled>备选项</el-checkbox>
</template>

<script>
  export default {
    data() {
      return {
        checked1: false,
        checked2: true,
      }
    },
  }
</script>

多选框组

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。

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。

<template>
  <el-checkbox-group v-model="checkList">
    <el-checkbox label="复选框 A"></el-checkbox>
    <el-checkbox label="复选框 B"></el-checkbox>
    <el-checkbox label="复选框 C"></el-checkbox>
    <el-checkbox label="禁用" disabled></el-checkbox>
    <el-checkbox label="选中且禁用" disabled></el-checkbox>
  </el-checkbox-group>
</template>

<script>
  export default {
    data() {
      return {
        checkList: ['选中且禁用', '复选框 A'],
      }
    },
  }
</script>

indeterminate 状态

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

<template>
  <el-checkbox
    :indeterminate="isIndeterminate"
    v-model="checkAll"
    @change="handleCheckAllChange"
    >全选</el-checkbox
  >
  <el-checkbox-group
    v-model="checkedCities"
    @change="handleCheckedCitiesChange"
  >
    <el-checkbox v-for="city in cities" :label="city" :key="city"
      >{{city}}</el-checkbox
    >
  </el-checkbox-group>
</template>

<script>
  const cityOptions = ['上海', '北京', '广州', '深圳']
  export default {
    data() {
      return {
        checkAll: false,
        checkedCities: ['上海', '北京'],
        cities: cityOptions,
        isIndeterminate: true,
      }
    },
    methods: {
      handleCheckAllChange(val) {
        this.checkedCities = val ? cityOptions : []
        this.isIndeterminate = false
      },
      handleCheckedCitiesChange(value) {
        let checkedCount = value.length
        this.checkAll = checkedCount === this.cities.length
        this.isIndeterminate =
          checkedCount > 0 && checkedCount < this.cities.length
      },
    },
  }
</script>

可选项目数量的限制

使用 min 和 max 属性能够限制可以被勾选的项目的数量。

<template>
  <el-checkbox-group v-model="checkedCities" :min="1" :max="2">
    <el-checkbox v-for="city in cities" :label="city" :key="city"
      >{{city}}</el-checkbox
    >
  </el-checkbox-group>
</template>

<script>
  const cityOptions = ['上海', '北京', '广州', '深圳']
  export default {
    data() {
      return {
        checkedCities: ['上海', '北京'],
        cities: cityOptions,
      }
    },
  }
</script>

按钮样式

按钮样式的多选组合。

只需要把el-checkbox元素替换为el-checkbox-button元素即可。此外，Element Plus 还提供了size属性。

<template>
  <div>
    <el-checkbox-group v-model="checkboxGroup1">
      <el-checkbox-button v-for="city in cities" :label="city" :key="city"
        >{{city}}</el-checkbox-button
      >
    </el-checkbox-group>
  </div>
  <div style="margin-top: 20px">
    <el-checkbox-group v-model="checkboxGroup2" size="medium">
      <el-checkbox-button v-for="city in cities" :label="city" :key="city"
        >{{city}}</el-checkbox-button
      >
    </el-checkbox-group>
  </div>
  <div style="margin-top: 20px">
    <el-checkbox-group v-model="checkboxGroup3" size="small">
      <el-checkbox-button
        v-for="city in cities"
        :label="city"
        :disabled="city === '北京'"
        :key="city"
        >{{city}}</el-checkbox-button
      >
    </el-checkbox-group>
  </div>
  <div style="margin-top: 20px">
    <el-checkbox-group v-model="checkboxGroup4" size="mini" disabled>
      <el-checkbox-button v-for="city in cities" :label="city" :key="city"
        >{{city}}</el-checkbox-button
      >
    </el-checkbox-group>
  </div>
</template>

<script>
  const cityOptions = ['上海', '北京', '广州', '深圳']
  export default {
    data() {
      return {
        checkboxGroup1: ['上海'],
        checkboxGroup2: ['上海'],
        checkboxGroup3: ['上海'],
        checkboxGroup4: ['上海'],
        cities: cityOptions,
      }
    },
  }
</script>

带有边框

设置border属性可以渲染为带有边框的多选框。

<template>
  <div>
    <el-checkbox v-model="checked1" label="备选项1" border></el-checkbox>
    <el-checkbox v-model="checked2" label="备选项2" border></el-checkbox>
  </div>
  <div style="margin-top: 20px">
    <el-checkbox
      v-model="checked3"
      label="备选项1"
      border
      size="medium"
    ></el-checkbox>
    <el-checkbox
      v-model="checked4"
      label="备选项2"
      border
      size="medium"
    ></el-checkbox>
  </div>
  <div style="margin-top: 20px">
    <el-checkbox-group v-model="checkboxGroup1" size="small">
      <el-checkbox label="备选项1" border></el-checkbox>
      <el-checkbox label="备选项2" border disabled></el-checkbox>
    </el-checkbox-group>
  </div>
  <div style="margin-top: 20px">
    <el-checkbox-group v-model="checkboxGroup2" size="mini" disabled>
      <el-checkbox label="备选项1" border></el-checkbox>
      <el-checkbox label="备选项2" border></el-checkbox>
    </el-checkbox-group>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        checked1: true,
        checked2: false,
        checked3: false,
        checked4: true,
        checkboxGroup1: [],
        checkboxGroup2: [],
      }
    },
  }
</script>

Checkbox Attributes

Checkbox Events

Checkbox-group Attributes

Checkbox-group Events

Checkbox-button Attributes