<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>26-jQuery事件冒泡和默行为</title>
<style>
*{
margin: 0;
padding: 0;
}
.father{
width: 200px;
height: 200px;
background: red;
}
.son{
width: 100px;
height: 100px;
background: blue;
}
</style>
<script src="js/jquery-1.12.4.js"></script>
<script>
$(function () {
/*
1.什么是事件冒泡?
当子元素与父元素都存在响应事件时，点击子元素事件，父元素事件也会响应
2.如何阻止事件冒泡
1. return false
2.
$(".son").click(function(event){
alert("son");
// return false
event.stopPropagation();
});
3.什么是默认行为?
4.如何阻止默认行为
*/
/* $(".son").click(function(event){
alert("son");
// return false
event.stopPropagation();
});
$(".father").click(function(){
alert("father");
}); */
$("a").click(function(event){
alert("弹出注册框");
// 阻止默认行为
// return false;
event.preventDefault();
});
});
</script>
</head>
<body>
<div class="father">
<div class="son"></div>
</div>
<a href="http://www.baidu.com">我是百度</a>
<form action="http://www.taobao.com">
<input type="text">
<input type="submit">
</form>
</body>
</html>