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<div id="app">
{{message}}
<component-a></component-a>
</div>
<script>
var bus= new Vue();
Vue.component('component-a',{
template : '<button @click = "handleEvent">传递事件</button>’,
methods :{
handleEvent:function(){
bus.$emit('on - message’,'来自组件component-a的内容');
}
}
});
var app=new Vue({
el:'#app',
data:{
message:''
},
mounted:function () {
var _this=this;
//在实例初始化时,监听来自bus 实例的事件
bus.$on(’on-message’,function(msg){
_this.message = msg;
});
}
})
</script>