1.首先, @click.native 是给组件绑定原生事件,只能用在组件上,不可以用在原生元素上。异常信息:
[vue warn]: The .native modifier for v-on is only valid on components but it was used on <button>.
2. 在组件上绑定@click="clickCpn"事件,click事件无法触发也不生效,需要通过使用@click.native="clickCpn",才能够执行clickCpn方法。
3. 除了 @click.native ,还可以在子组件中添加this.$emit ("click" ,value )方法 将子组件的值传到父组件。但是这种方法相对麻烦,比如组件中有多个事件,需要重复添加$emit()方法。
代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<p>{{ message }}</p>
<h1>{{form.title}}</h1>
<button @click="changeMessage">切换</button>
<br/>
<cpn @click.native="clickCpn"></cpn>
</div>
<template id="cpn">
<div>
<button @click="clickCpn1">组件点击事件1</button>
<button @click="clickCpn2">组件点击事件2</button>
</div>
</template>
<script>
let cpn = {
template: '#cpn',
methods:{
clickCpn1(){
console.log("child1 click event");
//this.$emit('click');
},
clickCpn2(){
console.log("child2 click event");
//this.$emit('click');
}
}
}
var app = new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!',
form:{
title: "标题党"
}
},
components:{
cpn,
},
watch: {
'form.title'(newVal, oldVal){
console.log(newVal + ' -- ' + oldVal);
}
},
methods: {
changeMessage(){
this.form.title = 'helloworld'
},
clickCpn(){
console.log("parent click event");
}
}
})
</script>
</body>
</html>