Google added a section on canonicalization best practices for JavaScript to the JavaScript SEO best practices document.
Of course, the first thing to do is open Firefox. Once you've done that, make sure to open the New Tab tab (Ctrl+T or Cmd+T).
This package contains a plugin that allows you to natively lint CSS files using ESLint. Important: This plugin requires ESLint v9.15.0 or higher and you must be using the new configuration system.