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回答

先看js的,通过 e.stopPropagation()阻止事件向上冒泡,完整代码如下:

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

</head>

<body>
<div style="width:400px;height:100px;background:#CCC;"BfwOnclick="myfunc(event);">
<span style="margin:auto;width:200px;height:50px;background:yellow;"BfwOnclick="myfunc(event);">事件冒泡</span>
</div>
<script>
function myfunc(e){
e.stopPropagation();//阻止点击事件向上冒泡
alert("span");
}
</script>
</body>

</html>

再看jquery的,通过 event.stopPropagation()阻止冒泡,示例代码如下:

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery-3.2.1.min.js"></script>
<script type="text/javascript">
$(function (){

$("body").click(function (event){
event.stopPropagation(); // 阻止事件冒泡
alert("body");

});
$("div").click(function (event){
event.stopPropagation(); // 阻止事件冒泡
alert("div");

});
$("span").click(function (event){
event.stopPropagation(); // 阻止事件冒泡
alert("span");

});
});
</script>
</head>

<body>
<div style="width:400px;height:100px;background:#CCC;">
<span style="margin:auto;width:200px;height:50px;background:yellow;" >事件冒泡</span>
</div>

</body>

</html>

最后看看vue怎么阻止事件冒泡?还是通过e.cancelBubble=true或者 v-on:click.stop=修饰符来实现,完整代码如下:

<html>


<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/vue.2.2.min.js"></script>
</head>

<body>
<div id="app">
<div style="width:400px;height:100px;background:#CCC;" @click="myfunc(event)">
<span style="margin:auto;width:200px;height:50px;background:yellow;" @click="myfunc(event)" >事件冒泡</span><span v-on:click.stop="myfun2">修饰符</span>
</div>
</div>


<script>
new Vue({
el: '#app',
data: function() {
return {
message:"hello world!",
score:59,
}
},
filters: {
handleData: function (value) {
if(value>=60) return '及格'
else return '不及格'
}
},
methods:{
myfunc:function(e){
alert("click");
e.cancelBubble=true; /*阻止冒泡*/
},myfun2:function(){
alert("click2");

}

},



})
</script>

</body>

</html>

主要,ie浏览器与现代浏览器对于冒泡事件阻止不同,兼容写法如下:

function stopPropagation(event){
var e=arguments.callee.caller.arguments[0] || event;//这里是因为除了IE有event其他浏览器没有所以要做兼容
if(window.event){ //这是IE浏览器
e.cancelBubble=true;
}else if(e && e.stopPropagation){ //这是其他浏览器
e.stopPropagation();//阻止冒泡事件
}
}

<buttonBfwOnclick="stopPropagation(event)"> 按钮 </button> // 使用



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