The JavaScript HandbookThe Valley of Code All rights reserved © 2026 A Flavio Copes project, yes all the 1,664 lessons have been handwritten in over 8 years with passion and sweat, it's not AI slop. Claude Code estimated 5,000 hours of work to write them, that's 2.5 years 24/7. Welcome to The Valley of Code. Your journey in Software Development starts here. We start with Web Development, but you can also learn other pro
