Summary of common units in css

Today I have summarized the 15 most commonly used units in CSS. To help you understand, I will list them one by one below.

1.px: Absolute unit, the page is displayed in precise pixels

2.em: Relative unit, the reference point is the font size of the parent node, iffont-size is defined by itselfCalculated by itself (the default font of the browser is 16px), 1em is not a fixed value in the entire page.

3.rem: Relative unit, which can be understood as "root em", calculated relative to the font size of the root node html. CSS3 adds a newattribute, supported by chrome/firefox/IE9+.

4.vw：viewpointwidth, window width, 1vw is equal to 1% of the window width.

5.vh：viewpointheight, window height, 1vh is equal to 1% of the window height.

6.vmin: The smaller one between vw and vh.

7.vmax: The larger of vw and vh.

8.%: Percentage

9.in: Inch

10.cm: Centimeter

11.mm: Millimeter

12.pt:point, about 1/72 inch

13.pc:pica, about 6pt, 1/6 inch

14.ex: Get the x height of the font of the current effect , calculated as 0.5em when the x height cannot be determined (not supported by IE11 and below, firefox/chrome/safari/opera/ios safari/androidbrowser4.4+, etc. all require attributes) Prefix)

15.ch: Based on the "0" character in the font used by the node, if not found, it is 0.5em (ie10+, chrome31+, safair7.1+, opera26+, ios safari 7.1+, android browser4.4+ support)

I believe you have understood the role of these units after reading this. For more exciting information, please pay attention to the php Chinese websiteOtherrelated articles!

Related reading:

CSS3’s detailed introduction to the translate attribute

CSS3’s introduction to the background-sizeattribute Detailed introduction

Tutorial on using the transform attribute in Css3

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