css-source-map-rebase

Rebase your CSS assets relatively to the source file they were imported from.

Installation

npm install css-source-map-rebase

Example

Consider the following SASS sources:

index.scss

@import "partial/bar.scss";

.foo {
    background: url('./foo.png');
}

partial/bar.scss

.bar {
    background: url('./bar.png');
}

By rebasing the assets relatively to the file they were imported from, the resulting CSS would be:

.bar {
    background: url('partial/bar.png');
}

.foo {
    background: url('foo.png');
}

How it works

css-source-map-rebase uses the mapping provided by a source map to resolve the original file the assets where imported from. Any tool able to generate a source map from a stylesheet source file (may it be SASS, LESS or any other pre-processor language) is appropriate. Here is how one could use node-sass and css-source-map-rebase together to render a stylesheet and rebase its assets.

const {render} = require('node-sass');
const {Rebaser} = require('css-source-map-rebase');

render({
    file: 'index.scss',
    sourceMap: true,
    sourceMapEmbed: sourceMapEmbed,
    outFile: 'index.css'
}, (error, result) => {
    if (error) {
        // do something on error
    }
    else {        
        let rebaser = new Rebaser();

        rebaser.rebase(result.css)
          .then(result => {
              // result.css contains the rendered stylesheet with rebased assets
              // result.map contains the source map
          });
    }
});

API

Read the documentation for more information.

Contributing

• Fork the main repository
• Code
• Implement tests using tape
• Issue a pull request keeping in mind that all pull requests must reference an issue in the issue queue

Running the test suite

The test suite can be run by executing the native test npm script:

npm test

Checking code coverage

This project adheres to a strict 100% code coverage policy. Code coverage can be checked by executing the cover npm script:

npm run cover

Generating the documentation

The documentation can be generated by executing the build:doc npm script:

npm run build:doc

This is usually not needed as the doc will be generated on every new release.

License

Apache-2.0 © Eric MORAND