Three ways to implement CSS three-column layouts (Holy Grail layout, dual-wing layout, Flex layout)

This article brings the content is about LNMP to the source of the way to record the environment building process (detailed), there is a certain reference value, the need for friends can refer to, I hope to help you.

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Holy Grail Layout

<! DOCTYPE html>
Dual Wing layout

<! DOCTYPE html>
Flex layouts

<! DOCTYPE html>
If main wants to give a certain width to the left and right module, only padding:0 100px 0 200px, or margin:0 100px 0 200px; both ways!
These two routes:
If you take the margin route, go all the way down, you will find that the final code you write is the double wing;
If you take the padding route, it is the Holy grail!

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CSS three ways to implement three-column layouts (with code)