CSS：HTML元素可以有多少类的限制？ [英] CSS: Is there a limit on how many classes an HTML element can have?

问题描述

CSS允许HTML元素包含多个类：

CSS allows an HTML element to have multiple classes:

<div class="cat persian happy big"> Nibbles </div>

但是每个项目允许有多少个

But is there a limit on how many classes are allowed per item?

推荐答案

您只受（X）HTML属性值的最大长度的限制，此答案。

You're only limited by the maximum length of an (X)HTML attribute's value, something covered well by this answer.

浏览器通常是非常原谅标准违规，因此个别浏览器可能允许更长的类属性。此外，您可能可以通过JavaScript向DOM元素添加几乎无限数量的类，受到浏览器可用内存量的限制。

Browsers are often very forgiving of standards violations, so individual browsers may allow much longer class attributes. Additionally you are likely able to add a practically infinite number of classes to a DOM element via JavaScript, limited by the amount of memory available to the browser.

对于所有意图和目的，没有限制。我假设你要求好奇心;不用说，如果你真的担心达到这个极限，你做了一些非常错误。

For all intents and purposes, there is no limit. I'm assuming you're asking out of curiosity; it goes without saying that if you're seriously worried about hitting this limit, you've done something very wrong.

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