Vue-子组件传父组件

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <!-- 接收通信，自定义接受类型和方法 -->
        <cpn v-on:itemclick="cpnClick"></cpn>
    </div>

    <template id="cpn">
        <div>
            <button v-for="item in categories" @click="btnclick(item)">{{item.name}}</button>

        </div>

    </template>

    <script src="vue.js"></script>
    <script>
        const cpn = {
            template: "#cpn",
            data() {
                return {
                    categories: [{
                            id: 'aaa',
                            name: "热门1"
                        },
                        {
                            id: 'bbb',
                            name: "热门2"
                        },
                        {
                            id: 'ccc',
                            name: "热门3"
                        },
                        {
                            id: 'ddd',
                            name: "热门4"
                        },
                        {
                            id: 'eee',
                            name: "热门5"
                        }

                    ]
                }
            },
            methods:{
                btnclick(item){
                    console.log("发送",item.id)
                    //子组件发射事件
                    this.$emit('itemclick',item)
                }
            }

        }

        const app = new Vue({
            el: "#app",
            data: {

            },
            components: {
                cpn,
            },
            methods:{
                cpnClick(item){
                    console.log("接受",item.id)
                }
            }

        })
    </script>
</body>

</html>
Vue-子组件传父组件

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