What is the difference between importing a style sheet and a link style sheet in CSS? I don't ask the syntax, but the internal difference. How can I see the difference between them?

1. Link labels belong to the XHTML category, while @ import is unique in css2.1. In addition to loading CSS, link labels can also do many other things, such as defining RSS and rel connection attributes. @ import can only load CSS.

2. the difference in the loading sequence is that when link loads CSS, It is a parallel method (no attempt is made to load CSS), while @ import loads the CSS only after the whole page is loaded.

3. Differences in compatibility, because @ import is unique to css2.1, it is ineffective for browsers that are not compatible with css2.1.

4. In terms of style control (for example, when a page layout is dynamically changed, JavaScript is used to operate the DOM), @ import is powerless.