03 父子组件sync&update

父组件传给子组件是基本数据类型。

父组件

<template>
  <el-container class="consele-container">
    
    <el-container>
      <el-header height="70px">
        <comp-console-head :is-fold.sync="isFold"></comp-console-head>
      </el-header>

      <el-main>Main</el-main>
    </el-container>
  </el-container>
</template>

<script>

import CompConsoleHead from "../../components/console/CompConsoleHead";
export default {
  name: "ConseleIndex",
  components: {
    CompConsoleHead
  },
  data() {
    return {
      isFold: false //是否折叠默认是不折叠 打开状态
    };
  },
  methods: {
    
  }
};
</script>

子组件

<template>
  <el-card class="box-card" :body-style="cardStyle">
    <el-row>
      <el-col :span="22">
        <i :class="isFold?'el-icon-s-unfold':'el-icon-s-fold'" @click="handleIconClick"></i>
      </el-col>
     
    </el-row>
  </el-card>
</template>
<script>
export default {
  name: "CompConsoleHead",
  props: {
    isFold: {
      type: Boolean,
      required: true
    }
  },
  data() {
    return {
      cardStyle: {
        padding: "20px 0 20px 20px "
      }
    };
  },
  methods: {
    handleIconClick() {
      this.$emit('update:isFold',!this.isFold)
    }
  }
};
</script>