4 ways to introduce CSS files
(1) Link type: in the
of the web page Use the tag in the tag to introduce external style sheet files, and use html rules to introduce external css (used more often):<link href="./mystyle.css" rel="stylesheet" type="text/css"/>
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(2) Import type: Introduce an independent .css file into the HTML file. The import type uses CSS rules to introduce external CSS files. The