WebStorm integrates with Stylelint so you can inspect your CSS code from inside the IDE. Stylelint wakes up automatically when you edit a CSS file and highlights the detected problems. To view the description of a problem in a pop-up information window, hover the mouse pointer over a stripe in the Validation sidebar. To examine errors and apply suggested quick fixes, press Alt+Enter.
Open the embedded Terminal (Alt+F12) and type
npm install -g stylelintat the command prompt.
Activating and configuring Stylelint
In the Settings/Preferences dialog (Ctrl+Alt+S), go to go to Languages and Frameworks | Style Sheets | Stylelint.
On the Stylelint page that opens, select the Enable checkbox to activate Stylelint. After that the controls in the dialog box become available.
In the Stylelint Package field, specify the location of the
stylelintpackage installed globally or in the current project.