JavaScript Deep Dive

The language behind every frontend job — learned properly instead of framework-first.

1. Step 01

   Syntax & types

   Values, coercion, scope, hoisting and strict mode.

   JavaScript

2. Step 02

   Functions & objects

   Closures, `this`, prototypes, classes and functional patterns.

   ClosuresPrototypes

3. Step 03

   Async

   Event loop, microtasks, promises, async/await, cancellation with AbortController.

   AsyncEvent Loop

4. Step 04

   Browser APIs

   DOM, events, fetch, storage, observers and Web Components basics.

   DOMFetch

5. Step 05

   Modules & tooling

   ESM, bundlers, tree shaking, source maps and Node runtime differences.

   ESMVite

6. Step 06

   Quality

   Testing, debugging in DevTools, and reading stack traces like a professional.

   VitestDevTools