CSS folding Style (1)-Three ways to use CSS styles

Source: Internet
Author: User

A CSS declaration tag is to tell the browser what form should be used to parse you, generally: <! DOCTYPE html> because HTML5 support backwards compatibility, detailed can see.

Second, how to use CSS style:
(1) Inner chain style sheet:

<! DOCTYPE html>  

(2) Embedded style sheet:

<!doctype html>  

(2) Introduction style sheet:

<! DOCTYPE html>  


/* HTML style definition   */  body{      background-color:yellow;      Color: #fff  }    div{      background:red;font-size:20px  }

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