<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<div ref="test">ref=test</div>
<!-- 应用组件-->
<test ref="a"></test>
<test ref="b"></test>
<div>父组件<span>{{count}}</span></div>
<input type="button" value="test" @click="change">
</div>
<script src="js/vue.js"></script>
<script>
Vue.component(‘test‘,{
template:‘<div>子组件-<span @click="add">{{number}}</span></div>‘,
data:function () {
return{
number:0
}
},
methods:{
add:function () {
this.number++
}
}
})
new Vue({
el:‘#app‘,
data:{
count:0
},
methods:{
// change:function () {
// this.$refs.test.innerText=‘已经被修改‘
// refs获取到当前页面所有用到ref的标签，所以可以修改值
// }
change:function () {
// console.log(this.$refs.a.number)
// console.log(this.$refs.b.number)
this.count= this.$refs.a.number+this.$refs.b.number
}
}
})
</script>
</body>
</html>
原文：https://www.cnblogs.com/liulilitoday/p/13369291.html