Javascript：按类名隐藏元素 [英] Javascript: Hide elements by class name

问题描述

我有一个html元素，我想从视图中隐藏，但我无法通过ID访问该元素，因为它没有ID，我无法为其分配ID。它有一个分配给它的类。有没有办法在没有id的情况下隐藏这个元素？

I have an html element that I want to hide from view, but I can't access that element by an ID because it has no ID and I can't assign an ID to it. It has a class assigned to it though. Is there any possible way to hide this element from view without having it's id?

推荐答案

有 getElementsByClassName 在某些浏览器中，但它没有像 getElementById 那样受到广泛支持。请注意，它会生成一个元素数组，而不仅仅是一个元素，因为多个元素可以具有相同的类。

There's getElementsByClassName in some browsers, but it's not as widely supported as getElementById. Note that it yields an array of elements, instead of just a single element, as several elements can have the same class.

如果您可以为父级分配ID，可能能够以其他方式访问它：

If you can assign an ID to a parent you might be able to access it in some other way:

document.getElementById('parent').getElementsByTagName('div')[3] // or whatever

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