<!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>自定义事件子父通信</title>
</head>
<body>
<div id="app">
<main-box></main-box>
</div>
</body>
<script src="./vue.js"></script>
<script>
const mainBox = {
template:`
<div>
<mainInput @send="get"></mainInput>
<!--在父模板中的子标签上@send添加监听事件，监听到事件时执行get函数，get函数写在父组件的methods中-->
<ul>
<li v-for="content in contents">{{content}}</li>
</ul>
</div>
`,
data(){
return{
contents:[]
}
},
methods:{
get(data){//get中data接受自定义事件传递的数据
this.contents.push(data)
}
}
}
const mainInput = {
template:`
<div>
<input @keyup.enter="sendmsg" type="text" v-model="content"/>
</div>
`,
data(){
return{
content:'',
}
},
methods:{
sendmsg(){//当执行sendmsg的时候触发自定义的send事件，send事件把this.content传送出去
this.$emit("send",this.content);
this.content = '';
}
}
}
Vue.component("mainBox",mainBox);
Vue.component("mainInput",mainInput);
const app = new Vue({
el:"#app",
})
</script>
</html>
