组件通信-子组件给父组件传递

作者: 木羽木羽女口生 | 来源:发表于2020-12-27 00:26 被阅读0次

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <cpn @item-click="cpnClick"></cpn>
</div>
<script src="../js/vue.js"></script>
<template id="cpn">
    <div>
        <button v-for="item in categories" @click="btnClick(item)">{{ item.name }}</button>
    </div>
</template>
<script>

  //1.子组件
  const cpn = {
    template: '#cpn',
    data(){
      return {
        categories: [
          {id: 'aaaa',name:'热门推荐'},
          {id: 'bbbb',name:'手机数码'},
          {id: 'cccc',name:'家用电器'},
          {id: 'dddd',name:'电脑办公'},
          {id: 'ffff',name:'其它'}
        ]
      }
    },
    methods: {
      btnClick(item){
        this.$emit('item-click',item)
      }
    }
  }

  //2.父组件
  const app = new Vue({
    el: '#app',
    data: {

    },
    components: {
      cpn
    },
    methods: {
        cpnClick(item){
          console.log(item.name);
        }

    }
  })
</script>
</body>
</html>