loadCSS
A JavaScript function and HTML pattern for loading CSS files asynchronously to prevent render-blocking.
What is loadCSS?
loadCSS is a JavaScript library and HTML pattern for loading CSS files asynchronously to prevent render-blocking. It provides a function to dynamically inject stylesheets and recommends a simple markup technique to improve page load performance by deferring non-critical CSS.
Frontend developers and web performance engineers who need to optimize CSS delivery and eliminate render-blocking resources.
Developers choose loadCSS for its simplicity, reliability, and focus on performance, offering a lightweight solution without polyfills or complex dependencies.
Overview
Load CSS asynchronously
Use Cases
Best For
- Deferring non-critical CSS to improve Largest Contentful Paint (LCP)
- Dynamically loading stylesheets based on user interactions or conditions
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