CSS-in-JS Performance Impact
Analyze the performance implications of different CSS-in-JS solutions and best practices for their use.
What is CSS-in-JS?
CSS-in-JS is a technique where CSS is authored directly within JavaScript code. Instead of separate .css files, your styles live alongside your components.
It offers benefits like component-scoped styles, dynamic styling based on props, and easier management of component-specific CSS.
How CSS-in-JS Works
Typically, CSS-in-JS libraries convert your JavaScript style definitions into actual CSS rules. These rules are then injected into the HTML <head> as <style> tags at runtime.
Alternatively, some advanced solutions can extract the CSS into static .css files during the build process.
All lessons in this course
- Critical CSS and CSS Delivery
- Optimizing Font Loading
- CSS-in-JS Performance Impact
- Reducing Unused CSS