vue封装带有全选的多选框

​ 基于element-ui的多选框组件(el-checkbox)进行二次封装，将全选的逻辑都封装到组件内部，使用v-model的方式进行数据的绑定，方便使用。

• 依赖

  element-ui@2.15.11

• 效果

• 组件代码

  <template>
    <div>
      <el-checkbox v-model="checkAll" :indeterminate="isIndeterminate" @change="handleCheckAllChange">全选</el-checkbox>
      <div style="margin: 15px 0;"></div>
      <el-checkbox-group v-model="checkData" @change="handleCheckedChange">
        <!--自定义插槽方式定义多选组-->
        <template v-if="$slots.default">
          <slot></slot>
        </template>
        <!--默认方式,数据格式为{value: '', label: ''}-->
        <template v-else>
          <el-checkbox v-for="(item, index) in options" :key="index" :label="item[value]">{{ item[label] }}</el-checkbox>
        </template>
      </el-checkbox-group>
    </div>
  </template>
  <script>
  
  /** @Description 带全选的多选择控件 */
  export default {
    name: 'AllSelectCheckbox',
    model: {
      prop: 'data',
      event: 'change'
    },
    props: {
      data: {
        type: Array,
        default: () => []
      },
      options: {
        type: Array,
        default: () => []
      },
      value: {
        type: String,
        default: 'value'
      },
      label: {
        type: String,
        default: 'label'
      },
      disabled: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        checkData: [],
        checkAll: false
      }
    },
    computed: {
      /** @Description 自动计算isIndeterminate */
      isIndeterminate() {
        const checkedCount = this.checkData.length
        const isIndeterminate = checkedCount > 0 && checkedCount < this.options.length
  
        return isIndeterminate
      },
      /** @Description 全选择的所有value */
      allOptionsValue() {
        return this.options.map(r => r[this.value])
      }
    },
    watch: {
      data() {
        this.checkData = this.data
      }
    },
    created() {
      this.checkData = this.data
    },
    mounted() {
  
    },
    methods: {
      /** @Description 全选 */
      doSelectAll() {
        this.$emit('change', [...this.allOptionsValue])
      },
      /** @Description 取消全选 */
      undoSelectAll() {
        this.$emit('change', [])
      },
      /** @Description 选择框变化 */
      handleCheckedChange(value) {
        const checkedCount = value.length
        this.checkAll = checkedCount === this.options.length
  
        this.$emit('change', value)
      },
      /** @Description 全选框变化 */
      handleCheckAllChange(val) {
        this.$emit('change', val ? [...this.allOptionsValue] : [])
      }
    }
  }
  
  </script>
  <style lang='css' scoped>
  </style>
  

• 使用示例

  <template>
    <div>
      <AllSelectCheckbox v-model="checkData" :options="options" value="code" label="name" :disabled="false">
        	<!---可以自定义插槽修改多选框内容---->
          <!-- <el-checkbox v-for="(item,index) in options" :key="index" :label="item.code">{{ item.name }}</el-checkbox> -->
      </AllSelectCheckbox>
    </div>
  </template>
  
  <script>
  import AllSelectCheckbox from '@/components/allSelectCheckbox'
  
  export default {
    components: {
      AllSelectCheckbox
    },
    data() {
      return {
        checkData: ['1'],
        options: [
          { code: '1', name: '男' },
          { code: '2', name: '女' },
          { code: '3', name: '其他' }
        ]
      }
    },
    mounted() {
  
    },
    methods: {
      change(val) {
        console.log(val)
      }
    }
  }
  
  </script>
  <style lang='css' scoped>
  </style>