🧩 Extension

CSS Modules

From https://github.com/css-modules/css-modules.

A CSS Module is a CSS file where all class names and animation names are scoped locally by default.

Extension offers first-class support for CSS modules, including Sass modules (*.module.sass, *.module.scss).

Starter CSS Module Template

Extension comes with a default CSS Module template for new projects, which you can use as a starting point for your next CSS Module-based Extension. This is the easiest way to have CSS Modules integrated with Extension.

Try it yourself

npx extension dev @Extension/templates/css-modules

Usage With An Existing Extension

Extension offfers zero-config CSS modules support. To enable CSS Modules for a CSS file, just rename it to include .module.css.

- myComponentCss.css
+ myComponentCss.module.css


import buttonStyles from './styles/myComponent.module.css'
export default function NewTabPage() {
  return (
    <button className={buttonStyles.primary}>
      Click here

Next Steps

  • Learn how to apply styles to the multiple extension contexts in Working With Stylesheets.
  • Learn how to enable PostCSS capabilities in your extension.
  • Configure Tailwind in your extension.
  • Using Stylelint with Extension to lint your stylesheets.

🧩 Extension • create cross-browser extensions with no build configuration.