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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
#one {
width: 400px;
height: 400px;
background-color: red;
}
#two {
width: 300px;
height: 300px;
background-color: green;
}
#three {
width: 200px;
height: 200px;
background-color: blue;
}
#two, #three {
position: relative;
left: 50px;
top: 50px;
}
</style>
</head>
<body>
<div id="one">
<div id="two">
<div id="three"></div>
</div>
</div>
<script>
(function() {
function f1(evt) {
alert('I am one');
}
function f2() {
alert('I am two');
}
function f3(evt) {
alert('I am three');
evt = evt || window.event;
// 阻止事件传播行为(冒泡或捕获)
if (evt.stopPropagation) {
evt.stopPropagation();
} else {
evt.cancelBubble = true;
}
}
// 要么是全局作用域 要么是函数级作用域
// 事件捕获 - 从外层向内层传递事件的过程
// 事件冒泡 - 从内层向外层传递事件的过程(默认)
// 内嵌的元素在响应事件之后会继续将事件传递到它的父元素
var fs = [f1, f2, f3];
var ids = ['one', 'two', 'three'];
for (var i = 0; i < ids.length; i += 1) {
var div = document.getElementById(ids[i]);
if (div.addEventListener) {
// 如果需要使用事件捕获可以传入第三个参数并赋值为true
div.addEventListener('click', fs[i]);
} else {
div.attachEvent('onclick', fs[i]);
}
}
})();
</script>
</body>
</html>