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What are the ways to declare css?

王林
王林Original
2020-11-27 11:09:223028browse

There are three ways to declare css, namely: 1. Use the style tag declaration in the head tag; 2. Use the style attribute declaration on the tag; 3. Use the link tag in the head tag to introduce external declarations css file.

What are the ways to declare css?

The environment of this article: windows10, css3, this article is applicable to all brands of computers.

(Learning video sharing: css video tutorial)

There are three ways to declare css, namely:

1. Use style in the head tag Tag declaration:

Function: This declaration generally declares the public style of the current web page or a separate style for a certain tag

2. Use the style attribute on the tag to declare:

Function: This statement will directly apply the css style to the current tag.

3. Use the link tag in the head tag to introduce externally declared css files

Function: This declaration is equivalent to a call, which solves the problem of reuse of styles between different web pages

Advantages:

Declare once, use anywhere

Note: Using different declaration methods on the same page follows the principle of proximity.

Example:

<!DOCTYPE html>
<html>
	<head>		
		<meta charset="utf-8">
		<title></title>
	<!--方式一声明-->
		<style type="text/css">
			hr{
				width: 100%;
				height: 50px;
				color: #000000;
				background: #808080;
			}
		</style>
		<!--方式三声明-->
		<link rel="stylesheet" type="text/css" href="my.css"/>
	</head>
			
	<body>
		测试声明方式一
		<hr > </hr>
		<!--方式二声明-->
		<h1 style="background: #151515;color: aqua;">测试声明方式二</h1>
		<h2>测试声明方式三</h2>
	</body>
</html>

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