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JavaScript

JavaScript Mastery: Zero to Senior

The only JS course built by a developer who codes live in front of 75K people.

Intermediate ⏱ 12 hours 20 lessons 1,247 enrolled
$97

Full lifetime access. Start immediately.

Includes:

  • 20 video lessons
  • 5 modules
  • 6h 5m total content
  • Code examples & exercises

About this course

Skip the tutorials that hold your hand and never let go. This course is for developers who want to actually understand JavaScript — closures, prototypes, async patterns, and the runtime itself. Built from the most-asked questions across 284 posts and hundreds of hours of live coding sessions. Every lesson is the answer to something a real dev got stuck on.

Curriculum

5 modules · 20 lessons

01 The Runtime Model 4 lessons ›

How the JS engine actually executes your code. Call stack, event loop, microtasks — no hand-waving.

  • ▶ How V8 parses and compiles your code Free Preview 18m
  • ▶ The call stack visualised Free Preview 14m
  • 🔒 Event loop: macrotasks vs microtasks 22m
  • 🔒 Why setTimeout(fn, 0) isn't instant 11m
02 Closures & Scope 4 lessons ›

The feature every dev says they understand and half of them don't. We go deep.

  • ▶ Scope chain explained with real examples Free Preview 16m
  • 🔒 Building closures intentionally 20m
  • 🔒 The module pattern and why it still matters 18m
  • 🔒 Memory leaks from accidental closures 13m
03 Async JavaScript 5 lessons ›

Callbacks, Promises, async/await, and why the distinctions matter in production.

  • 🔒 Promises from scratch (no libraries) 24m
  • 🔒 async/await is just Promises with syntax 19m
  • 🔒 Parallel vs sequential async patterns 21m
  • 🔒 Error handling that actually works 17m
  • 🔒 AbortController and cancellation 14m
04 Prototypes & Classes 4 lessons ›

The object model under the hood, not the class syntax sugar.

  • 🔒 The prototype chain without the confusion 22m
  • 🔒 new keyword: what it does step by step 15m
  • 🔒 class syntax deconstructed 18m
  • 🔒 Mixins and composition patterns 20m
05 TypeScript Integration 3 lessons ›

Adding types to real JS codebases without rewriting everything.

  • 🔒 Adding TypeScript to an existing project 16m
  • 🔒 Types that help vs types that annoy 22m
  • 🔒 Generics for people who keep avoiding them 25m

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