标签：console log js015 捕捉 冒泡 addEventListener var document click
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="i1" style="width: 300px;height: 300px;background-color: #e75e15">
<div id="i2" style="width: 100px;height: 100px;background-color:#dddddd"></div>
</div>
<div id="i3" style="width: 300px;height: 300px;background-color: #e75e15;margin-top: 20px">
<div id="i4" style="width: 100px;height: 100px;background-color:#dddddd"></div>
</div>
<script>
//第三个参数，默认是false--事件冒泡过程--从内向外
//第三个参数，如果是true--事件捕捉过程--从外向内
var d1 = document.getElementById('i1');
d1.addEventListener('click',function (){console.log(111)},false);
var d2 = document.getElementById('i2');
d2.addEventListener('click',function (){console.log(222)},false);
var d3 = document.getElementById('i3');
d3.addEventListener('click',function (){console.log(333)},true);
var d4 = document.getElementById('i4');
d4.addEventListener('click',function (){console.log(444)},true);
</script>
</body>
</html>
标签：console,
log,
js015,
捕捉,
冒泡,
addEventListener,
var,
document,
click
From： https://www.cnblogs.com/lfyxys/p/16921189.html