Web Components Demystified online course | Scott Jehl, Web Designer/Developer
https://scottjehl.com/learn/webcomponentsdemystified/?holiday
A comprehensive, premium course about building dynamic, fast, resilient apps with standard web components.
Complete CSS - Piccalilli
https://piccalil.li/complete-css
A high quality, expansive CSS course that will elevate your CSS and core skills to a level you never thought was achievable.
Practical Accessibility — Practical Accessibility for web designers and developers
https://practical-accessibility.today/
A get-right-down-to-it online course for Web designers and developers who want to start creating more accessible websites and applications today