Polyfills Courses
Udacity Replacing jQuery with Vanilla JavaScript
Udemy JavaScript: Async
LinkedIn Learning JavaScript Scroll Animation Tutorial - Web Animations API
Coding Tech via YouTube Dealing with Cross Browser Compatibility
Kevin Powell via YouTube Breaking Bad - Web Components in Production, What Worked for Us
JSConf via YouTube Moving JS from Libraries to Polyfills
JSConf via YouTube Accessibility of Web Components
JSConf via YouTube CSS Levels Up
JSConf via YouTube Polyfilling the Gaps
JSConf via YouTube