事件冒泡与取消机制-优快云博客

本文链接：https://blog.youkuaiyun.com/chaofei_liang/article/details/78075524

1. 原生事件冒泡

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <style>

    </style>
    <script src="vue.js"></script>
    <script>
        window.οnlοad=function(){
            new Vue({
                el:'#box',
                data:{

                },
                methods:{
                    show:function(ev){
                        alert(1);
                        //ev.cancelBubble=true;
                    },
                    show2:function(){
                        alert(2);
                    }
                }
            });
        };
    </script>
</head>
<body>
    <div id="box">
        <div @click="show2()">
            <input type="button" value="按钮" @click="show($event)">
        </div>
    </div>
</body>
</html>

事件冒泡：

从内向外扩散，点击input,会扩散到外层的div,一直向上扩散。点击完按钮，会依次执行事件show()和show2()

结果：

先弹出1，后弹出2

使用原生js取消冒泡：

ev.cancelBubble=true;

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <style>

    </style>
    <script src="vue.js"></script>
    <script>
        window.οnlοad=function(){
            new Vue({
                el:'#box',
                data:{

                },
                methods:{
                    show:function(ev){
                        alert(1);
                        ev.cancelBubble=true;
                    },
                    show2:function(){
                        alert(2);
                    }
                }
            });
        };
    </script>
</head>
<body>
    <div id="box">
        <div @click="show2()">
            <input type="button" value="按钮" @click="show($event)">
        </div>
    </div>
</body>
</html>

点完按钮后，只弹出1来。

2.Vue中事件冒泡

取消事件冒泡：使用 .stop来取消事件冒泡

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <style>

    </style>
    <script src="vue.js"></script>
    <script>
        window.οnlοad=function(){
            new Vue({
                el:'#box',
                data:{

                },
                methods:{
                    show:function(){
                        alert(1);
                    },
                    show2:function(){
                        alert(2);
                    }
                }
            });
        };
    </script>
</head>
<body>
    <div id="box">
        <div @click="show2()">
            <input type="button" value="按钮" @click.stop="show()">
        </div>
    </div>
</body>
</html>

Vue之事件冒泡