GitHub - css-modules/postcss-modules-scope: A CSS Modules transform to extract export statements from local-scope classes (original) (raw)

CSS Modules: Scope Locals & Extend

Transforms:

:local(.continueButton) { color: green; }

into:

:export { continueButton: __buttons_continueButton_djd347adcxz9; } .__buttons_continueButton_djd347adcxz9 { color: green; }

so it doesn't pollute CSS global scope and can be simply used in JS like so:

import styles from "./buttons.css"; elem.innerHTML = <button class="${styles.continueButton}">Continue</button>;

Composition

Since we're exporting class names, there's no reason to export only one. This can give us some really useful reuse of styles:

.globalButtonStyle { background: white; border: 1px solid; border-radius: 0.25rem; } .globalButtonStyle:hover { box-shadow: 0 0 4px -2px; } :local(.continueButton) { compose-with: globalButtonStyle; color: green; }

becomes:

.globalButtonStyle {
  background: white;
  border: 1px solid;
  border-radius: 0.25rem;
}
.globalButtonStyle:hover {
  box-shadow: 0 0 4px -2px;
}
:local(.continueButton) {
  compose-with: globalButtonStyle;
  color: green;
}

Note: you can also use composes as a shorthand for compose-with

Local-by-default & reuse across files

You're looking for CSS Modules. It uses this plugin as well as a few others, and it's amazing.

Building

• Status:
• Lines:
• Statements:

Development

• npm test:watch will watch src and test for changes and run the tests

License

ISC

With thanks

• Mark Dalgleish
• Tobias Koppers
• Guy Bedford

Glen Maddern, 2015.