This course is the of JavaScript. Jonas teaches mental models —visualizing the stack, heap, and execution context. The 2020 release date is largely irrelevant for core concepts; only the styling and build tool are outdated.
Pair this with a 2025 "JavaScript in 2025" YouTube video (covering Array.at() , Object.groupBy , Temporal API) to fill the gaps. For $15-20 on sale, this provides more lasting value than 90% of "trendy" bootcamp courses. "You don't learn JavaScript by reading theory; you learn it by building things that break." — This course embodies that mantra. This course is the of JavaScript