jQuery中的event.preventDefault()和event.stopPropagation()有什么区别？
stopPropogation()方法
要停止将事件冒泡到父元素，请使用stopPropagation()方法。
示例
您可以尝试运行以下代码来学习如何使用stopPropogation()方法：
<html>
<head>
<title>jQuery stopPropagation() method</title>
<script src = "https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script type = "text/javascript" language = "javascript">
$(document).ready(function() {
$("div").click(function(event){
alert("This is : " + $(this).text());
event.stopPropagation();
});
});
</script>
<style>
div {
margin:10px;
padding:12px;
border:2px solid #666;
width:160px;
}
</style>
</head>
<body>
<p>Click on any box to see the effect:</p>
<div id = "div1" style = "background-color:blue;">
OUTER BOX
<div id = "div2" style = "background-color:red;">
INNER BOX
</div>
</div>
</body>
</html>preventDefault()方法
该preventDefault()方法可防止浏览器执行默认操作。
示例
您可以尝试运行以下代码以在jQuery中运行event.preventDefault()方法：
<html>
<head>
<title>jQuery preventDefault() method</title>
<script src = "https://cdn.staticfile.org/jquery/2.1.3/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("a").click(function(event){
event.preventDefault();
alert( "默认行为已禁用！" );
});
});
</script>
</head>
<body>
<span>Click the following link and it won't work:</span>
<a href = "https://www.qries.com">Qries</a>
</body>
</html>