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What is the difference between link and @import when introducing CSS files into html?
What is the difference between link and @import when introducing CSS files into html?
Previously introduced How to introduce CSS files into HTML. There are four ways to import CSS into HTML, namely inline, embedded, and external styles. External styles are divided into import style and link style. It is also an external style, so what is the difference between link and @import? Those who want to know, please continue reading below.
1. Differences in import methods
link link type:
<link rel="stylesheet" type="text/css" href="css/green.css"/>
import import type:
<style type="text/css">
@import url("css/green.css");
</style>II , Differences in browsers
link will not cause compatibility issues, while @import needs to be implemented in IE5 or above.
During the page loading process, if it is a CSS style file imported by link, the CSS style will be loaded at the same time as the content. If it is a CSS file introduced by @import, the style will be loaded after the page is loaded.
3. Differences in dependency relationships
@import is a syntax rule provided by CSS and only has the function of importing style sheets. Link is a tag provided by HTML. It can not only load CSS files, but also define RSS, rel connection attributes, etc.
4. Differences in DOM control style
When you need javascript to control the DOM to change the style, you can only use the link tag, because @import cannot be controlled by the DOM.
5. The difference between CSS priorities
The priorities of CSS styles with equal weight from high to low are: inline style, inline style, and external style. , import styles. If both the external link style and the imported style have a div{color:XX}, the final div style is the div style defined in the external link style.
Example: Give the div inline style, inline style, external style, and imported style respectively to see what effect it will have in the end.
<link rel="stylesheet" type="text/css" href="css/green.css"/> have a nice day
Rendering:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
div{background: yellow;}
@import url("css/red.css");
</style>
</head>
<body>
<div style="width: 150px;height: 150px;">have a nice day </div>
</body>
</html>
CSS. In general, it is best not to use the import import style. If the style loaded by the import is relatively large, it is easy to load. Delay and even screen flickering. For now, it is recommended for small websites to use link import. Of course, if we need to modularize CSS in the future, @import will be used. This depends on the situation.
The above is the detailed content of What is the difference between link and @import when introducing CSS files into html?. For more information, please follow other related articles on the PHP Chinese website!
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