elementUI中复选框checkbox的使用

elementUI中复选框checkbox的使用

<template>
  <div style="padding:20px;">
    <el-card>
      <el-checkbox v-model="checked">备选项el-checkbox>
      <div>{{ checked }}div>
    el-card>
    <el-card style="margin-top:20px;">
      <el-checkbox-group v-model="checkList" @change="getCheck">
        <el-checkbox
          v-for="item in checkboxOption"
          :key="item.value"
          :label="item.value"
        >el-checkbox>
      el-checkbox-group>
    el-card>
    // 可全选
    <el-card style="margin-top:20px;">
      
      <el-checkbox
        :indeterminate="isIndeterminate"
        v-model="checkAll"
        @change="CheckAllChange"
        >全选el-checkbox
      >
      <el-checkbox-group v-model="checkCity" @change="getCheckAll">
        <el-checkbox
          v-for="item in cityOption"
          :key="item"
          :label="item"
        >el-checkbox>
      el-checkbox-group>
    el-card>
  div>
template>

<script>
export default {
  name: "",
  data() {
    return {
      checked: true,
      checkList: [],
      checkboxOption: [
        { value: "打篮球" },
        { value: "打游戏" },
        { value: "玩电脑" },
        { value: "看书" },
      ],
      checkAll: false,
      isIndeterminate: true,
      cityOption: ["a", "b", "c", "d"],
      checkCity: ["a", "c"],
    };
  },
  methods: {
    getCheck() {
      console.log("checkList", this.checkList);
    },
    CheckAllChange(value) {
      // console.log("quanxuan", value);
      this.checkCity = value ? this.cityOption : [];
      // 点击全选的时候，控制的样式只有 不选和全选√ 所以isIndeterminate控制的样式不出现
      this.isIndeterminate = false;
    },
    getCheckAll(value) {
      // console.log("选择", value, this.checkCity.length);
      let checkedCount = value.length;
      this.checkAll = checkedCount === this.checkCity.length;
      // 当选择的选项大于0小于所有的数据的时候 isIndeterminate控制的样式出现
      this.isIndeterminate =
        checkedCount > 0 && checkedCount < this.cityOption.length;
    },
  },
};
script>

<style lang="scss" scoped>style>

效果展示

参考elementUI