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.
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>Related recommendations:CSS tutorial
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