<template>
 <div id="app">
  {{msg}}
  <button @click="run()">@click事件触发</button>
  <button v-on:click="runvon()">v-on:click事件触发</button>
  <button @click="getMsg()">获取data.msg</button>
  <button v-on:click="setMsg()">设置data.msg</button>
  <ul>
   <li v-for="item in list">{{item}}</li>
  </ul>
  <button @click="setList()">设置List的值</button>
  <button @click="sendData('123')">方法传值</button>
  <button v-on:click="sendEvent($event)">传递事件对象</button>
  <button @click="sendEventSet($event)">传递事件对象，并设置背景色</button>
  <button data-a="啦啦啦" @click="sendEventData($event)">传递事件对象，并获取自定义属性</button>
 </div>
</template>

<script>
export default {
 name: 'app',
 data () {
  return {
   msg: '123',
   list:[]
  }
 },
 methods:{
  run(){
   alert("@click事件触发")
  },
  runvon(){
   alert("v-on:click事件触发")
  },
  getMsg(){
   alert("我获取到了msg"+this.msg);
  },
  setMsg(){
   this.msg="我是设置后的值"
  },
  setList(){
   for(var i = 0 ; i < 10 ; i++){
    this.list.push(i)
   }
   
  },
  sendData(a){
   alert("穿过来的值是："+a)
  },
  sendEvent(e){
   console.log(e);
  },
  sendEventSet(e){
   e.srcElement.style.background="red";
  },
  sendEventData(e){
   alert(e.srcElement.dataset.a)
   
  }
 }
}
</script>
<style lang="scss">
</style>

import Vue from 'vue'
var VueEvent = new Vue();
export default VueEvent;

import Vue from 'vue'
var VueEvent = new Vue();
export default VueEvent;

<template>
<div id="home">
  <button @click="sendMsg()">我来触发事件</button>
</div>
</template>
<script>
import VueEvent from "../models/VueEvent.js";
export default {
 data() {
  return {
   msg: "我是Home的msg"
  };
 },
 methods: {
  sendMsg() {
   VueEvent.$emit("tonews", this.msg);
  }
 }
};
</script>
<style>
</style>

<template>
<div id="news">
  我来接受事件--{{msg}}
</div>
</template>
<script>
import VueEvent from "../models/VueEvent.js";
export default {
 data() {
  return {
   msg: "我是News的msg"
  };
 },
 mounted() {
  VueEvent.$on("tonews", res => {
   this.msg = res;
  });
 }
};
</script>
<style>
</style>

<template>
 <div id="app">
  <v-home></v-home>
  <hr />
  <v-news></v-news>
 </div>
</template>

<script>
import Home from "./components/Home.vue";
import News from "./components/News.vue";
export default {
 name: "app",
 data() {
  return {
   msg: "Welcome to Your Vue.js App"
  };
 },
 components: {
  "v-home": Home,
  "v-news": News
 }
};
</script>

<style lang="scss">
</style>