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CSS @import Causes Render-Blocking and Performance Issues

5/10 Medium

Using CSS `@import` rules creates additional sequential HTTP requests and render-blocking behavior that delays page rendering. Each imported file is fetched sequentially rather than in parallel, degrading frontend performance.

CSS
Category
performance
Workaround
solid
Stage
build
Freshness
persistent
Recurring
No

Sources

Collection History

Query: “What are the most common pain points with HTTP for developers in 2025?”3/31/2026

The `@import` rule in CSS creates additional HTTP requests and is render-blocking. Each imported file is fetched sequentially, which delays the overall CSS parsing. Instead of `@import`, use `<link rel="stylesheet">` tags in HTML (which can load in parallel) or better yet, combine CSS files at build time when possible.

Created: 3/31/2026Updated: 3/31/2026