Stylelint

Download and install Node.js.

Make sure a local Node.js interpreter is configured in your project: open the Settings/Preferences dialog Ctrl+Alt+S and go to Languages and Frameworks | Node.js and NPM. The Node Interpreter field shows the default project Node.js interpreter.

Learn more from Configuring a local Node.js interpreter.

To activate Stylelint, open the Settings/Preferences dialog Ctrl+Alt+S, go to Languages and Frameworks | Style Sheets | Stylelint, and select the Enable checkbox. After that the controls in the dialog become available.

In the Stylelint Package field, specify the location of the stylelint package installed globally or in the current project. If you followed the standard installation procedure, IntelliJ IDEA detects the package automaticaly.

Optionally:

In the Configuration file field, specify the location of your configuration file.

By default, the field is empty and IntelliJ IDEA uses the Stylelint native mechanism to detect configurations automatically. With this auto-detection mode, Stylelint goes up the folder structure and looks for configurations defined in one of the following ways:

• Through a stylelint property in a package.json file.

• In a .stylelintrc.json, .stylelintrc.yaml, .stylelintrc.yml, or .stylelintrc.js file.

• In a stylelint.config.js file that exports a JavaScript object.

• In a stylelint.config.cjs file that exports a JavaScript object. When running Stylelint in JavaScript, packages with the "type":"module" property in their package .json.

Learn more from the Stylelint official website.

To use a custom configuration file, click in the Configuration file field and select the path to the required configuration file in the dialog that opens.

If you want Stylelint to also wake up automatically when you are editing a JavaScript file and check Style Sheet injections in it, select the Process JS files checkbox.