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JS Memory Leak School

JS Memory Leak School

A hands-on course on JavaScript memory leaks — browser and server
Start with fundamentalsJump to browser demos

What you’ll learn

Section titled “What you’ll learn”

Fundamentals

Stack vs heap, references, garbage collection, and how V8 powers Chrome and Node.

Browser leaks

Live interactive demos for timers, detached DOM, listeners, closures, and caches.

Node.js leaks

Runnable scripts for server-side patterns — run with node --inspect.

Detect & debug

DevTools, heap snapshots, retainers, log signatures, and monitoring graphs.

How to use this course

Section titled “How to use this course”

Work through the sidebar in order. Each lesson includes:

  • What & why — the mental model behind the leak
  • Diagrams — Mermaid visuals for retention and GC
  • Broken vs fixed code — side-by-side examples
  • Hands-on — browser demos or Node scripts you run locally