1 <!DOCTYPE html>
  2 <html lang="en">
  3 <head>
  4     <meta charset="UTF-8" />
  5     <title>Vue2-单一事件管理组件通信</title>
  6     <script src="vue.js"></script>
  7     <script type="text/javascript">
  8 
  9     //准备一个空的实例对象
 10     var Event = new Vue();
 11 
 12     //组件A
 13     var A = {
 14         template: `
 15             <div>
 16                 <span>我是A组件的数据->{{a}}</span>
 17                 <input type="button" value="把A数据传给C" @click = "send">
 18             </div>
 19         `,
 20         methods: {
 21             send () {
 22                 Event.$emit("a-msg", this.a);
 23             }
 24         },
 25         data () {
 26             return {
 27                 a: "我是a组件中数据"
 28             }
 29         }
 30     };
 31     //组件B
 32     var B = {
 33         template: `
 34             <div>
 35                 <span>我是B组件的数据->{{a}}</span>
 36                 <input type="button" value="把B数据传给C" @click = "send">
 37             </div>
 38         `,
 39         methods: {
 40             send () {
 41                 Event.$emit("b-msg", this.a);
 42             }
 43         },
 44         data () {
 45             return {
 46                 a: "我是b组件中数据"
 47             }
 48         }
 49     };
 50     //组件C
 51     var C = {
 52         template: `
 53             <div>
 54                 <h3>我是C组件</h3>
 55                 <span>接收过来A的数据为: {{a}}</span>
 56                 <br>
 57                 <span>接收过来B的数据为: {{b}}</span>
 58             </div>
 59         `,
 60         mounted () {
 61            //接收A组件的数据
 62            Event.$on("a-msg", function (a) {
 63                 this.a = a;
 64            }.bind(this));
 65 
 66            //接收B组件的数据
 67            Event.$on("b-msg", function (a) {
 68                 this.b = a;
 69            }.bind(this));
 70         },
 71         data () {
 72             return {
 73                 a: "",
 74                 b: ""
 75             }
 76         }
 77     };
 78     window.onload = function () {
 79         new Vue({
 80             el: "#box",
 81             components: {
 82                 "dom-a": A,
 83                 "dom-b": B,
 84                 "dom-c": C
 85             }
 86         });
 87     };
 88 
 89 
 90     </script>
 91 </head>
 92 <body>
 93     <div id="box">
 94         <dom-a></dom-a>      
 95         <dom-b></dom-b>      
 96         <dom-c></dom-c>      
 97     </div>
 98 
 99 </body>
100 </html>