5 stylelint is an [npm package](https://www.npmjs.com/package/stylelint). Install it using:
8 npm install -g stylelint
13 `stylelint --help` prints the CLI documentation.
15 The CLI outputs formatted results into `process.stdout`, which you can read with your human eyes or pipe elsewhere (e.g. write the information to a file).
19 When you run commands similar to the examples below, be sure to include the quotation marks around file globs. This ensures that you can use the powers of node-glob (like the `**` globstar) regardless of your shell.
21 Looking for `.stylelintrc` and linting all `.css` files in the `foo` directory:
27 Looking for `.stylelintrc` and linting all `<style>` blocks within the `.html` files in the `bar` directory:
30 stylelint "bar/*.html"
33 Looking for `.stylelintrc` and linting `stdin`:
36 echo "a { color: pink; }" | stylelint
39 Using `bar/mySpecialConfig.json` as config to lint all `.css` files in the `foo` directory, then writing the output to `myTestReport.txt`:
42 stylelint "foo/*.css" --config bar/mySpecialConfig.json > myTestReport.txt
45 Using `bar/mySpecialConfig.json` as config, with quiet mode on, to lint all `.css` files in the `foo` directory and any of its subdirectories and also all `.css` files in the `bar directory`, then writing the JSON-formatted output to `myJsonReport.json`:
48 stylelint "foo/**/*.css bar/*.css" -q -f json --config bar/mySpecialConfig.json > myJsonReport.json
51 Linting all `.css` files except those within `docker` subfolders, using negation in the input glob:
54 stylelint "**/*.css, !**/docker/**"
57 Caching processed `.scss` files in order to operate only on changed ones in the `foo` directory, using the `cache` and `cache-location` options:
60 stylelint "foo/**/*.scss" --cache --cache-location "/Users/user/.stylelintcache/"
63 Linting all the `.css` files in the `foo` directory, using the `syntax` option:
66 stylelint "foo/**/*.css" --syntax scss
69 In addition to `--syntax scss`, stylelint supports `--syntax less` and `--syntax sugarss` by default. If you're using one of the default syntaxes, you may not need to provide a `--syntax` option as non-standard syntaxes can be automatically inferred from the following:
71 - The following file extensions: `.less`, `.scss`, and `.sss`.
72 - The following values for the `lang` or `type` attribute on `<style>` tags (e.g. `lang="scss"`, `type="text/scss"`): `scss`, `less` and `sugarss`.
73 - The following Markdown code fencing markers (e.g. ```` ```scss ````): `scss`, `less` and `sugarss`.
75 Additionally, stylelint can accept a custom [PostCSS-compatible syntax](https://github.com/postcss/postcss#syntaxes). To use a custom syntax, supply a syntax module name or path to the syntax file: `--custom-syntax custom-syntax` or `--custom-syntax ./path/to/custom-syntax`.
77 Note, however, that stylelint can provide no guarantee that core rules will work with syntaxes other than the defaults listed above.
79 ### Recursively linting a directory
81 To recursively lint a directory, using the `**` globstar:
84 stylelint "foo/**/*.scss"
87 The quotation marks around the glob are important because they will allow stylelint to interpret the glob, using node-glob, instead of your shell, which might not support all the same features.
91 With `--fix` option stylelint will fix as many errors as possible. The fixes are made to the actual source files. All unfixed errors will be reported.
93 Linting all `.css` files in the `foo` directory. And fixing source files if violated rules support autofixing:
96 stylelint "foo/*.css" --fix
99 **Note:** It's an _experimental_ feature. It currently does not respect special comments for disabling stylelint within sources (e. g. `/* stylelint-disable */`). Autofixing will be applied regardless of these comments.
101 If you're using both these special comments and autofixing, please run stylelint twice as a temporary solution. On the first run, some violations could be missed, or some violations might be reported incorrectly.
103 For CSS with standard syntax, stylelint will use [postcss-safe-parser](https://github.com/postcss/postcss-safe-parser) to fix syntax errors.
107 The CLI informs you about syntax errors in your CSS.
108 It uses the same format as it uses for linting violations.
109 The error name is `CssSyntaxError`.
113 The CLI can exit the process with the following exit codes:
115 - 1: Something unknown went wrong.
116 - 2: At least one rule with an "error"-level severity triggered at least one violations.
117 - 78: There was some problem with the configuration file.
118 - 80: A file glob was passed, but it found no files.