Knowledge Base|Key topics and interview-ready concepts in React.js and Node.js
Basics
Scope and Closures
Functional Programming
Object-Oriented Programming (OOP)
Asynchronous JavaScript
Error Handling
ECMAScript Fundamentals
ECMAScript Advanced Concepts
Regular Expressions
TypeScript Structure and Design
TypeScript Type System
Modules
OREsc
Last update: Jul 17, 2025
Short overview