Share 17 points of PC Browser front-end optimization strategy — Network loading
1. Place the CSS resource reference at the top of the HTML file
2. Place JavaScript resource references at the bottom of the HTML file
3. Try to pre-set the size of the picture
4. Do not zoom images directly in HTML
5. Reduce DOM element count and depth
6. Try to avoid adding wildcards to the end of selectors
7. Reduce the use of relational style sheets
8. Minimize the use of JS animations
9. CSS animations use Translate and scale instead of top and height
10. Avoid using tables and iframe
11. Avoid running time-consuming JavaScript
12. Avoid USING CSS expressions or CSS filters
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