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stylelint documentation

stylelint - GitHub

Configuration in MegaLinter

Variable Description Default value
CSS_STYLELINT_ARGUMENTS User custom arguments to add in linter CLI call
Ex: -s --foo "bar"
CSS_STYLELINT_FILTER_REGEX_INCLUDE Custom regex including filter
Ex: (src\|lib)
Include every file
CSS_STYLELINT_FILTER_REGEX_EXCLUDE Custom regex excluding filter
Ex: (test\|examples)
Exclude no file
CSS_STYLELINT_CLI_LINT_MODE Override default CLI lint mode
- file: Calls the linter for each file
- list_of_files: Call the linter with the list of files as argument
- project: Call the linter from the root of the project
CSS_STYLELINT_FILE_EXTENSIONS Allowed file extensions. "*" matches any extension, "" matches empty extension. Empty list excludes all files
Ex: [".py", ""]
[".css", ".scss", ".saas"]
CSS_STYLELINT_FILE_NAMES_REGEX File name regex filters. Regular expression list for filtering files by their base names using regex full match. Empty list includes all files
Ex: ["Dockerfile(-.+)?", "Jenkinsfile"]
Include every file
CSS_STYLELINT_PRE_COMMANDS List of bash commands to run before the linter None
CSS_STYLELINT_POST_COMMANDS List of bash commands to run after the linter None
CSS_STYLELINT_CONFIG_FILE stylelint configuration file nameUse LINTER_DEFAULT to let the linter find it .stylelintrc.json
CSS_STYLELINT_RULES_PATH Path where to find linter configuration file Workspace folder, then MegaLinter default rules
CSS_STYLELINT_DISABLE_ERRORS Run linter but consider errors as warnings false
CSS_STYLELINT_DISABLE_ERRORS_IF_LESS_THAN Maximum number of errors allowed 0

IDE Integration

Use stylelint in your favorite IDE to catch errors before MegaLinter !

IDE Extension Name Install
Atom linter-stylelint Visit Web Site
Emacs flycheck Visit Web Site
Sublime Text SublimeLinter-stylelint Visit Web Site
Sublime Text SublimeLinter-contrib-stylelint_d Visit Web Site
vim ale Visit Web Site
Visual Studio Code vscode-stylelint Install in VSCode

MegaLinter Flavours

This linter is available in the following flavours

Flavor Description Embedded linters Info
all Default MegaLinter Flavor 113 Docker Image Size (tag) Docker Pulls
cupcake MegaLinter for the most commonly used languages 81 Docker Image Size (tag) Docker Pulls
documentation MegaLinter for documentation projects 48 Docker Image Size (tag) Docker Pulls
dotnet Optimized for C, C++, C# or VB based projects 60 Docker Image Size (tag) Docker Pulls
go Optimized for GO based projects 50 Docker Image Size (tag) Docker Pulls
java Optimized for JAVA based projects 51 Docker Image Size (tag) Docker Pulls
javascript Optimized for JAVASCRIPT or TYPESCRIPT based projects 57 Docker Image Size (tag) Docker Pulls
php Optimized for PHP based projects 51 Docker Image Size (tag) Docker Pulls
python Optimized for PYTHON based projects 58 Docker Image Size (tag) Docker Pulls
ruby Optimized for RUBY based projects 48 Docker Image Size (tag) Docker Pulls
rust Optimized for RUST based projects 48 Docker Image Size (tag) Docker Pulls
salesforce Optimized for Salesforce based projects 51 Docker Image Size (tag) Docker Pulls
swift Optimized for SWIFT based projects 48 Docker Image Size (tag) Docker Pulls
terraform Optimized for TERRAFORM based projects 53 Docker Image Size (tag) Docker Pulls

Behind the scenes

How are identified applicable files

  • File extensions: .css, .scss, .saas

How the linting is performed

  • stylelint is called once with the list of files as arguments (list_of_files CLI lint mode)

Example calls

stylelint myfile.css
stylelint --config .stylelintrc.json myfile.css myfile2.css myfile3.css
stylelint --fix --config .stylelintrc.json myfile.css myfile2.css myfile3.css

Help content

  A mighty CSS linter that helps you avoid errors and enforce conventions.

  Usage: stylelint [input] [options]

  Input: Files(s), glob(s), or nothing to use stdin.

    If an input argument is wrapped in quotation marks, it will be passed to
    globby for cross-platform glob support. node_modules are always ignored.
    You can also pass no input and use stdin, instead.



      Path to a specific configuration file (JSON, YAML, or CommonJS), or the
      name of a module in node_modules that points to one. If no --config
      argument is provided, stylelint will search for configuration files in
      the following places, in this order:
        - a stylelint property in package.json
        - a .stylelintrc file (with or without filename extension:
          .json, .yaml, .yml, and .js are available)
        - a stylelint.config.js file exporting a JS object
      The search will begin in the working directory and move up the directory
      tree until a configuration file is found.


      An absolute path to the directory that relative paths defining "extends",
      "plugins", and "customSyntax" are *relative to*. Only necessary if these
      values are relative paths.


      Print the configuration for the given path.

    --ignore-path, -i

      Path to a file containing patterns that describe files to ignore. The
      path can be absolute or relative to process.cwd(). You can repeat the
      option to provide multiple paths. By default, Stylelint looks for
      .stylelintignore in process.cwd().

    --ignore-pattern, --ip

      Pattern of files to ignore (in addition to those in .stylelintignore)


      Automatically fix problems of certain rules.


      Module name or path to a JS file exporting a PostCSS-compatible syntax.


      Accept stdin input even if it is empty.


      A filename to assign stdin input.

    --ignore-disables, --id

      Ignore stylelint-disable comments.

    --disable-default-ignores, --di

      Allow linting of node_modules.

    --cache                       [default: false]

      Store the info about processed files in order to only operate on the
      changed ones the next time you run stylelint. By default, the cache
      is stored in "./.stylelintcache". To adjust this, use --cache-location.

    --cache-location              [default: '.stylelintcache']

      Path to a file or directory to be used for the cache location.
      Default is "./.stylelintcache". If a directory is specified, a cache
      file will be created inside the specified folder, with a name derived
      from a hash of the current working directory.

      If the directory for the cache does not exist, make sure you add a trailing "/"
      on *nix systems or "\" on Windows. Otherwise the path will be assumed to be a file.

    --cache-strategy              [default: "metadata"]

      Strategy for the cache to use for detecting changed files. Can be either
      "metadata" or "content".

      The "content" strategy can be useful in cases where the modification time of
      your files changes even if their contents have not. For example, this can happen
      during git operations like "git clone" because git does not track file modification

    --formatter, -f               [default: "string"]

      The output formatter: "compact", "github", "json", "string", "tap", "unix" or "verbose".


      Path to a JS file exporting a custom formatting function.
      The file can either be a filesystem path, a module name, or a file to load from a dependency.

    --quiet, -q

      Only register problems for rules with an "error"-level severity (ignore


      Force enabling/disabling of color.

    --report-needless-disables, --rd

      Also report errors for stylelint-disable comments that are not blocking a lint warning.
      The process will exit with code 2 if needless disables are found.

    --report-invalid-scope-disables, --risd

      Report stylelint-disable comments that used for rules that don't exist within the configuration object.
      The process will exit with code 2 if invalid scope disables are found.

    --report-descriptionless-disables, --rdd

      Report stylelint-disable comments without a description.
      The process will exit with code 2 if descriptionless disables are found.

    --max-warnings, --mw

      Number of warnings above which the process will exit with code 2.
      Useful when setting "defaultSeverity" to "warning" and expecting the
      process to fail on warnings (e.g. CI build).

    --output-file, -o

      Path of file to write report.

    --version, -v

      Show the currently installed version of stylelint.

    --allow-empty-input, --aei

      When glob pattern matches no files, the process will exit without throwing an error.

    --globby-options, --go

      Options in JSON format passed to globby.

Installation on mega-linter Docker image