在CSS透视图上使用单位 [英] Using units on CSS perspective

问题描述

只是一个快速的问题，澄清我对CSS 透视上的单位的混淆。

Just a quick question to clear up some confusion that I have regarding units on CSS perspective.

CSS转换规范它引用它与 px 例如透视：1000px; 但我已经使用，在许多其他地方，其他人使用它不具有 px perspective：1000; ，例如W3Schools。

On the CSS Transforms spec it references it with px e.g. perspective: 1000px; but I have used and in many other places others have used it without px e.g. perspective: 1000; such as on W3Schools.

是否重要？

只要清除这个问题，谢谢。

Just want to clear this up, thanks.

推荐答案

只是因为它被（一些）浏览器接受并不意味着它是正确的。
指定度量单位是 CSS规范要求的，除非该值为零。

Just because it's accepted by (some) browsers doesn't mean it's correct. Specifying a unit of measurement is required by the CSS spec, unless the value is zero.

规格说明：

长度距离测量，并且由< length>在属性定义中。长度是维度。零长度可以代替地表示为<数字>。 '0'。 （换句话说，对于零长度，单位标识符是可选的。）

Lengths refer to distance measurements and are denoted by <length> in the property definitions. A length is a dimension. A zero length may be represented instead as the <number> ‘0’. (In other words, for zero lengths the unit identifier is optional.)

一个维度是一个数字，紧跟一个单位标识符。 / p>

A dimension is a number immediately followed by a unit identifier.

请参阅距离单位和

See the Distance Units and the Other Units for examples.

另请参阅MDN对长度

这篇关于在CSS透视图上使用单位的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！