我定义了三个子组件，为什么点第一个和第二个，只有第三个会变；点第三个，前面两个不会变，搞不懂咩，哪个路过大哥能告诉我一下。
<!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>非父子组件传值(Bus/总线/发布订阅模式/观察者模式)</title>
<script src="./vue.js"></script>
</head>
<body>
<div id="root">
<child content="xie"></child>
<child content="Dell"></child>
<child content="Lee"></child>
</div>
<script>
Vue.prototype.bus = new Vue()
Vue.component('child', {
data: function() {
return {
selfContent: this.content
}
},
props: {
content: String,
},
template: '<div @click="handleClick">{{selfContent}}</div>',
methods: {
handleClick: function() {
this.bus.$emit('change', this.selfContent)
},
},
mounted: function() {
this_ = this
this.bus.$on('change', function(msg) {
this_.selfContent = msg
})
}
})
var vm = new Vue({
el: '#root',
})
</script>
</body>
</html>