stylelint-rules

A style (CSS, Sass) linter for the 18F style guide

The aim of this module is to present a sensible set of linting defaults for front-end projects, without requiring an additional dependency on ruby. It leverages stylelint and postCSS to perform many of the same linting functions as scss-lint.

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Usage Information

To get started, run npm install --save-dev @18f/stylelint-rules. This adds the module to your project and saves the dependency to your package.json.

stylelint-rules provides two ways to run its linter: via the command line, and via gulp.

Run via gulp

To run the linter using gulp, import the module into your gulpfile: var stylelint = require('@18f/stylelint-rules');

The stylelint function accepts two arguments:

• files: required A glob of files you want to lint. For example './src/scss/**/*.scss'

• options: optional An object of configuration options.

  {
    syntax: Syntax the linter validates against. Valid options are `scss|css|less`. Defaults to scss
    ignore: A glob (or array of globs) of files the linter should ignore,
    config: A path to a stylelint config file. File should use the same
    conventions as the config file found in this repository, exporting a
    single javascript object.
  
  }
  

Example gulp task:

var lintFunction = stylelint('./src/css/**/*.scss', {
  ignore: 'some/lib/**/*.scss'
});

gulp.task('my-lint-task', lintFunction);

Run via the command line

The linter can also be run using the command line. The script is installed in the .bin folder of your node_modules directory. The only required argument to the script is a glob of directories (or path to a single file) to be linted.

For example: node_modules/.bin/18f-stylelint-rules "./path/to/sass/**/*.scss"

Additionally, the CLI exposes the following options:

-s, --syntax [scss|css|less], Linter syntax. Defaults to scss.
-i, --ignore-files [string], Glob of directories or files to ignore
-f, --formatter [verbose|json|string], Output formatter. Defaults to verbose.
-c, --config [rules], Path to a js file that exports an object describing additional rules.

Contributing

Please see CONTRIBUTING.md.