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JavaScript

Closures, prototypes, event loop, async patterns

4 topics

🥚 1🐣 2🦖 1

🥚

Egg

Fundamentals

Closures & Lexical Scope

Closures aren't just an interview topic — they're the mechanism behind React hooks, module patterns, and half of functional programming in JS.

JavaScriptFundamentals

🐣

Hatchling

Intermediate

The JavaScript Event Loop

Understanding the event loop is what separates engineers who debug from engineers who architect. Master the execution model that powers every line of JS.

JavaScriptBrowser APIsPerformance

Prototypes & Inheritance

JavaScript's prototype chain is the engine beneath classes, Object.create, and half the 'magic' in the language. Master the mental model interviewers expect.

JavaScriptFundamentalsOOP

🦖

Dinosaur

Advanced

Async Patterns

Promises, async/await, and concurrency control are table stakes for senior frontend roles. Know the patterns that separate production code from tutorial code.

JavaScriptAsyncArchitecture