CSS-in-JS vs CSS Modules

Developers should use CSS-in-JS when building modern web applications with frameworks like React, Vue, or Angular, as it provides scoped styling that prevents global CSS conflicts and supports dynamic theming meets developers should use css modules when building component-based applications where style isolation is critical to avoid naming collisions and improve code maintainability. Here's our take.

CSS-in-JS

Nice Pick

Developers should use CSS-in-JS when building modern web applications with frameworks like React, Vue, or Angular, as it provides scoped styling that prevents global CSS conflicts and supports dynamic theming

Pros

• It's particularly useful for large-scale projects where maintainability and component isolation are priorities, and when leveraging JavaScript's power for conditional or runtime styling
• Related to: react, javascript

Cons

• Specific tradeoffs depend on your use case

CSS Modules

Developers should use CSS Modules when building component-based applications where style isolation is critical to avoid naming collisions and improve code maintainability

Pros

• It is particularly useful in large-scale projects with multiple developers, as it allows for local scoping without relying on naming conventions like BEM
• Related to: react, vue-js

Cons

• Specific tradeoffs depend on your use case

The Verdict

These tools serve different purposes. CSS-in-JS is a library while CSS Modules is a methodology. We picked CSS-in-JS based on overall popularity, but your choice depends on what you're building.

The Bottom Line

CSS-in-JS wins

Based on overall popularity. CSS-in-JS is more widely used, but CSS Modules excels in its own space.