4.DOM事件 - 1.阻止事件冒泡 - 《前端基础》

e.stopPropagation()

    <style>
        #parent{
            width: 200px;
            height: 200px;
            background-color: red;
        }
        #child{
            width: 100px;
            height: 100px;
            background-color: yellow;
        }
    </style>
</head>
<body>
    <div id="parent">
        <div id="child">
        </div>
    </div>
    <script>
       var parent=document.querySelector("#parent")
       var child=document.querySelector('#child')
       parent.onclick=function(){
           alert('parent')
       }  
       child.onclick=function(e){
           alert('child')
           e.stopPropagation()
       }
    </script>