What are the ways to introduce css?

There are 3 ways to introduce: add defined style attribute value inline, inline call and external link call in the page header,

Difference:

1.link is an xhtml tag, in addition to loading In addition to css, you can also define other transactions such as RSS. @import can only load CSS

2. When link refers to CSS, it is loaded at the same time when the page is loaded. @import requires that the page is fully loaded before loading

3.link is an XHTML tag and has no compatibility issues. @import was proposed in CSS2.1 and is not supported by lower version browsers.

4.link supports using javascript to control the DOM to change the style, but @import does not support it.

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