javascript document.getElementsByClassName() 不像 getElementById 那样工作？
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document.getElementsByClassName() not working like getElementById does?
提问by Dylan Cross
Possible Duplicate:
Can getElementsByClassName change style?
I am trying to "fix" the "new" YouTube using Greasemonkey, I've been getting things to work as they should when it's with ID's, however I have been unable to modify anything with a class, it appears I am unable to select it or whatever anyways.
我正在尝试使用 Greasemonkey 来“修复”“新”YouTube，当它带有 ID 时，我一直在按照它们应该的方式工作，但是我一直无法使用类修改任何内容，看来我无法选择它或无论如何。
I have been trying to use:
我一直在尝试使用：
document.getElementsByClassName("video-extras-sparkbar-likes").style.height='10px';
However it isn't working. :\
但是它不起作用。：\
I'm not very familiar with Greasemonkey and what not, so would there be a reason why though my browser supports this, Greasemonkey may not?
我对 Greasemonkey 不是很熟悉，还有什么不熟悉的，那么尽管我的浏览器支持这个，Greasemonkey 可能不支持，这有什么原因吗？
回答by pala?н
You might need to loop through the results, like this:
您可能需要遍历结果，如下所示：
var divs = document.getElementsByClassName('video-extras-sparkbar-likes');
for(var i=0; i < divs.length; i++) {
divs[i].style.height = '10px';
}
