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vue-emit-on.html
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vue-emit-on.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
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<link rel="shortcut icon" href="/favicon.png?v=198964">
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<meta name="description" content="Vue用$emit与$on来进行兄弟组件之间的通信">
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<title>Vue用$emit与$on来进行兄弟组件之间的通信</title>
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<h1 class="title">Vue用$emit与$on来进行兄弟组件之间的通信</h1>
<section class="info">
<span class="avatar" style="background-image: url(https://joe-10005639.cossh.myqcloud.com/jkbb.jpg);"></span> <a class="name" href="javascript:;">江矿叔叔.</a>
<span class="date" data-time="1503460800"><span class="from"></span></span>
<span class="tags"><a class="tages" href="/tag/Vue/index.html">Vue</a></span>
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<article class="content"><p>Vue用$emit与$on来进行兄弟组件之间的通信</p>
<pre><code class="language-html"><template>
<div id="app">
<dom-a></dom-a>
<dom-b></dom-b>
<dom-c></dom-c>
</div>
</template>
</code></pre>
<pre><code class="language-js"> <script>
var Event = new Vue();
//组件A
var A = {
template: `
<div>
<span>我是A组件的数据->{{a}}</span>
<input type="button" value="把A数据传给C" @click="send">
</div>
`,
methods: {
send () {
Event.$emit("a-msg", this.a);
}
},
data () {
return {
a: "我是a组件中数据"
}
}
};
//组件B
var B = {
template: `
<div>
<span>我是B组件的数据->{{a}}</span>
<input type="button" value="把B数据传给C" @click = "send">
</div>
`,
methods: {
send () {
Event.$emit("b-msg", this.a);
}
},
data () {
return {
a: "我是b组件中数据"
}
}
};
//组件C
var C = {
template: `
<div>
<h3>我是C组件</h3>
<span>接收过来A的数据为: {{a}}</span>
<br>
<span>接收过来B的数据为: {{b}}</span>
</div>
`,
mounted () {
//接收A组件的数据
Event.$on("a-msg", function (a) {
this.a = a;
}.bind(this));
//接收B组件的数据
Event.$on("b-msg", function (a) {
this.b = a;
}.bind(this));
},
data () {
return {
a: "",
b: ""
}
}
};
window.onload = function () {
new Vue({
el: "#app",
components: {
"dom-a": A,
"dom-b": B,
"dom-c": C
}
});
};
</script>
</code></pre>
<p>Vue用$emit与$on来进行跨页面之间的数据传输通信
on和emit的事件必须是在一个公共的实例上，才能触发。</p>
<pre><code class="language-js">import Vue from 'vue'
export var bus = new Vue()
App.vue里created方法里定义事件
import { bus } from 'bus.js'
created () {
bus.$on('tip', (text) => {
alert(text)
})
}
Test.vue组件内调用
import { bus } from 'bus.js'
bus.$emit('tip', '123')
</code></pre>
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