<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>阻止冒泡和默认事件</title></head><body><button>阻止冒泡和默认事件</button><script> ???function stopPropagation(e) { ???????if (e && e.stopPropagation) { ???????????console.log(1); ???????????e.stopPropagation();//阻止冒泡非ie8及以下版本 ???????} else { ???????????console.log(2); ???????????window.event.cancelBubble = true;//阻止冒泡ieie8及以下版本 ???????} ???????if (e && e.preventDefault ) { ???????????console.log(3); ???????????e.preventDefault();//阻止默认非ie8及以下版本 ???????} else { ???????????console.log(4); ???????????window.event.returnValue = false;//阻止默认ie8及以下版本 ???????} ???} ???var btn=document.getElementsByTagName("button")[0]; ???btn.onclick= function (e) { ???????alert(111); ???????stopPropagation(e); ???}; ???document.onclick= function () { ???????alert(222); ???}</script></body></html>js阻止冒泡和默认事件
原文地址：https://www.cnblogs.com/xiaobaibubai/p/8117032.html