使用纯javascript获取被点击元素的索引 [英] Get index of clicked element using pure javascript
本文介绍了使用纯javascript获取被点击元素的索引的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要知道点击元素的索引。无法弄清楚怎么做
I need to know the index of clicked element. Can't figure out how to do it
for (i = 0; i < document.getElementById('my_div').children.length; i++) {
document.getElementById('my_div').children[i].onclick = function(){'ALERT POSITION OF CLICKED CHILD'};
}
this.index？
this.index?
这是我想要做的一个例子（它只返回6）：
here is a example of what I am trying to do (it only gives back 6):
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Untitled Document</title>
<style type="text/css">
body{margin:0;}
#container div{height:50px;line-height:50px; text-align:center}
</style>
</head>
<body>
<div id="container">
<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
</div>
<script>
for (i = 0; i < document.getElementById('container').children.length; i++) {
document.getElementById('container').children[i].onclick = function(){alert('Number ' + i + ' was clicked')};
}
</script>
</body>
</html>
推荐答案
这是一段代码，可以帮助您获取中循环内单击元素的索引。您只需要一个新的范围：
Here is a piece of code that can help you get the index of the clicked element inside the for loop. All you need is a new scope:
var g = document.getElementById('my_div');
for (var i = 0, len = g.children.length; i < len; i++)
{
(function(index){
g.children[i].onclick = function(){
alert(index) ;
}
})(i);
}
编辑1：合并用户Felix Kling对答案的评论。
Edit 1: Incorporating user Felix Kling's comments into the answer.
事件处理程序已经是一个闭包
event handler already is a closure
编辑2：更新的小提琴链接
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