CSS的现实世界单位的准确性如何？ [英] How accurate are CSS's real-world units?

问题描述

我开始使用CSS的现实世界单位进行实验，特别是在和 cm

I'm beginning experiments with CSS' real-world units, specifically, in and cm, for purposes of printing.

这些单位是基于它们在屏幕上的显示方式还是如何由打印机打印？

Are these units based on how they will be displayed on-screen or how they will be printed by a printer? How accurate are these units?

推荐答案

根据W3C，只有 em ， px 和％推荐用于屏幕，其他用于打印。

According to W3C, only em, px and % are recommended for screen, the others for print.

因此，在打印应用程序中，在和 cm 测量可以精确准确。

Therefore, in a print application, the in and cm measurements could be precisely accurate.

有关此类应用程序的一篇很好的文章：

http://meyerweb.com/eric/articles/webrev/200001.html

There is an excellent article on such applications here:
http://meyerweb.com/eric/articles/webrev/200001.html

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