正则表达式getElementById [英] Regular expression getElementById

问题描述

我很久以来第一次需要使用纯Javascript，并习惯了jQuery的舒适床垫，所有重要的东西都是逃避我的。

<我需要在正则表达式中选择一堆div。所以我有这样的东西;

 < div id =id_123456_7890123> ..< / div> 
< div id =id_123456_1120092> ..< / div> 
< div id =id_555222_1200192> ..< / div> 
< div id =id_123456_9882311> ..< / div> 
  

我需要创建一个循环遍历所有的div， id_123456 _ 。我怎么会这样做？

之前，我使用了jQuery和：regex 过滤器插件，它似乎没有多少我可以打捞纯粹的JavaScript重写。

解决方案

在普通的JavaScript，你可以做这个泛型搜索应该在每个浏览器中工作：
$ b $ pre $ var divs = document.getElementsByTagName（div），item;
for（var i = 0，len = divs.length; i< len; i ++）{
item = divs [i];
if（item.id&& item.id.indexOf（id_123456_）== 0）{
// item.id以id_123456_ $ b $开头}
}


工作示例： http://jsfiddle.net/jfriend00/pYSCq/

I need to use pure Javascript for the first time in a long while, and having gotten used to the comfy mattress of jQuery, all the important stuff is escaping me.

I need to select a bunch of divs on regular expression. So I have stuff like this;

<div id="id_123456_7890123"> .. </div>
<div id="id_123456_1120092"> .. </div>
<div id="id_555222_1200192"> .. </div>
<div id="id_123456_9882311"> .. </div>

And I'd need to create a loop that goes through all the divs with an id that begins with id_123456_. How would I go about doing that?

I used jQuery with the :regex filter plugin before, but looking at it, it doesn't seem like there's much I could salvage in a pure javascript rewrite.

解决方案

In plain javascript, you could do this generic search which should work in every browser:

var divs = document.getElementsByTagName("div"), item;
for (var i = 0, len = divs.length; i < len; i++) {
    item = divs[i];
    if (item.id && item.id.indexOf("id_123456_") == 0) {
        // item.id starts with id_123456_
    }
}

Working example: http://jsfiddle.net/jfriend00/pYSCq/

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