JavaScript learning roadmaps and fundamentals
View All Tags
Install Node.js 26 LTS for a new learning project. If a course repository explicitly requires a supported older version, follow that requirement first. Node 24 and 22 still receive support; Node 20 does not. Check node --version before changing anything, and choose the LTS download rather than an alpha release.
MCP is a JSON-RPC 2.0 standard that lets an AI app (the host) call your code through a server exposing tools, resources and prompts, a typed API the model discovers at runtime. The 2026-07-28 revision made it stateless: no initialize handshake, no sessions. If you know APIs, the model and a STDIO server still hold; new code uses SDK v2.
Jonas Schmedtmann's The Complete JavaScript Course is the best JavaScript course on Udemy in 2026: 4.7 stars and four real builds, Pig Game, Bankist, Mapty and Forkify. Maximilian Schwarzmüller's course goes deeper on language internals; Brad Traversy's finishes faster. Scrimba's free Learn JavaScript course is the pick if you want to type the code instead of watching it.
Beginner JavaScript projects, todo lists, timers, quiz flows, API readers, teach more than tutorials because you type the logic, hit the edge cases, and deploy something real. The 20 below are ranked by what they train, state, fetch, deploy discipline, so a portfolio site outranks a calculator even though the calculator is simpler to build.
The Scrimba specifics below (module names, scrim counts, instructors) come from our own course reviews, each written after going through the course inside a Pro account. Full sourcing is in data/courses.json and the linked review pages.