菜鸟学堂在线工具

源代码

<!DOCTYPE html>
<html>
<head>
<script src="http://edu.jb51.net/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("span").click(function(event){
    event.stopPropagation();
    alert("The span element was clicked.");
  });
  $("p").click(function(event){
    alert("The p element was clicked.");
  });
  $("div").click(function(){
    alert("The div element was clicked.");
  });
});
</script>
</head>
<body>
<div style="height:100px;width:500px;padding:10px;border:1px solid blue;background-color:lightblue;">
This is a div element.
<p style="background-color:pink">This is a p element, in the div element. <br><span style="background-color:orange">This is a span element in the p and the div element.</span></p></div>
<p><b>Note:</b> Click on each of the elements above. When clicking on the <b>div</b> element, it will alert that the div element was clicked. When clicking on the <b>p</b> element, it will return both the p and the div element, since the p element is inside the div element.
But when clicking on the <b>span</b> element, it will only return itself, and not the p and the div element (even though its inside these elements). The event.stopPropagation() stops the click event from bubbling to the parent elements.
</p>
<p><b>Tip:</b> Try to remove the event.stopPropagation() line, and click on the span element again (the click event will now bubble up to parent elements).</p>
</body>
</html>

运行结果 在线运行