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postcss-modules-scope
Advanced tools
A CSS Modules transform to extract export statements from local-scope classes
The postcss-modules-scope npm package is a PostCSS plugin that helps in locally scoping CSS by automatically renaming classes and other identifiers to be unique. This ensures that styles do not conflict across different parts of an application. It is commonly used in modular CSS architecture.
Local Scoping of CSS Classes
This feature automatically renames CSS classes to include a unique identifier, preventing class name collisions.
/* Input CSS */
.className {
color: red;
}
/* Output CSS after processing with postcss-modules-scope */
._className_1a2b3c {
color: red;
}
Renaming of Animation Names
This feature renames animation names with a unique identifier to avoid conflicts with other animations in the global scope.
/* Input CSS */
@keyframes myAnimation {
from { opacity: 0; }
to { opacity: 1; }
}
/* Output CSS after processing with postcss-modules-scope */
@keyframes myAnimation_1a2b3c {
from { opacity: 0; }
to { opacity: 1; }
}
css-loader is a webpack loader that interprets `@import` and `url()` like `import/require()` and will resolve them. It also offers modules functionality that allows for local scoping of CSS by default, similar to what postcss-modules-scope provides.
postcss-modules is another PostCSS plugin that goes beyond scoping and also tracks the CSS dependencies and exports the generated identifiers. It provides a more integrated solution for working with CSS modules.
postcss-preset-env is a plugin that allows you to use future CSS features today. It includes cssdb-compliant plugins that convert modern CSS into something most browsers can understand, ensuring that features are only polyfilled as needed. It doesn't provide CSS modules functionality directly but can be used in conjunction with other modules plugins.
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>`;
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
You're looking for CSS Modules. It uses this plugin as well as a few others, and it's amazing.
npm install
npm test
npm test:watch
will watch src
and test
for changes and run the testsISC
Glen Maddern, 2015.
FAQs
A CSS Modules transform to extract export statements from local-scope classes
The npm package postcss-modules-scope receives a total of 14,487,004 weekly downloads. As such, postcss-modules-scope popularity was classified as popular.
We found that postcss-modules-scope demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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