<body>
<div id="app">
<!-- 2.监听子组件发射的事件 然后再父组件处理事件 -->
<cpn @itemclick="cpnClick"></cpn>
</div>
<template id="cpn">
<div>
<button v-for="item in categories" @click="btnClick(item)"> {{ item.name }} </button>
</div>
</template>
<script src='https://cdn.jsdelivr.net/npm/vue@2.6.12/dist/vue.js'></script>
<script>
const cpn = {
template: "#cpn",
data() {
return {
categories: [{
id: 'aaa',
name: "热门推荐"
}, {
id: 'bbb',
name: "手机数码"
}, {
id: 'ccc',
name: "家用电器"
}, {
id: 'ddd',
name: "电脑办公"
}, ]
}
},
methods: {
btnClick(item) {
// 1. 子传父 用发射事件 $emit("自定义事件名称",传递的参数)
this.$emit("itemclick", item)
}
}
}
const app = new Vue({
el: '#app',
data: {
},
components: {
cpn,
},
methods: {
cpnClick(item) {
console.log(item);
}
}
})
</script>
</body>