JavaScript Roadmap

JavaScript, a scripting or programming language that allows you to implement complex features & interactive effects on web pages, is evolving. Here is a step-by-step guide to learning JavaScript.

JavaScript Roadmap


Beginner Topics

Start with these topics:

  • Introduction to JavaScript
  • History of JavaScript
  • JavaScript Versions
  • All About Variables
  • Variable Declarations
  • Variable Naming Rules
  • Hoisting
  • Data Types
  • How to run JavaScript?
  • Variable Scopes
  • Object
  • Object Prototype
  • Prototypal Inheritance
  • Built-in Objects
  • Primitive Types: string, number, bigint, boolean, null, undefined, Symbol
  • typeof operator
  • Data Structures
  • Indexed Collections: Arrays, Typed Arrays
  • Keyed Collections: Map, Weak Map, Set, Weak Set
  • Structured Data: JSON
  • Type Casting
  • Explicit Type Casting
  • Type Conversion vs Coercion
  • Equality Comparisons
  • Value Comparison Operators: ==, ===, Object.is
  • Equality Algorithms: isLooselyEqual, isStrictlyEqual, SameValueZero, SameValue
  • Loops and Iterations: for statement, do…while statement, while statement, break / continue, Labeled Statements, for…in statement, for…of statement
  • Control Flow
  • Conditional Statements
  • Exception Handling: throw statement, try / catch / finally, Utilizing Error Objects
  • Expressions and Operators: Assignment Operators, Comparison Operators, Arithmetic Operators, Bitwise Operators, Logical Operators, BigInt Operators, String Operators, Conditional Operators, Comma Operators, Unary Operators, Relational Operators

Intermediate Topics

Pick them after beginner topics:

  • Functions: Defining and Calling Functions, Function Parameters, Default Params, Rest Params, Arrow Functions, IIFEs, Scope & Function Stack, Recursion, Lexical Scoping, Closures, arguments object, Built-in Functions in a method, in a function, Strict Mode, Using (this) keyword, using it alone, in event handlers, in arrow functions, Function Borrowing
  • Asynchronous JavaScript: setTimeout, setInterval, Callbacks, Promises, async / await, Callback Hell
  • Classes
  • Iterators and Generators
  • Modules in JavaScript: CommonJS, ECMAScript Modules
  • Memory Management: Memory Lifecycle, Garbage Collection, Using Chrome Dev Tools, Debugging Issues, Debugging Memory Leaks, Debugging Performance

Advanced Topics

Pick these after intermediate topics:

  • Backend Roadmap
  • Frontend Roadmap
  • Working with APIs: XMLHttpRequest, Fetch

Test your Knowledge

  • New All Quizzes → JavaScript75 Questions
  • React51 Questions

Related Roadmaps

  • Node.js: Step by step guide to becoming a Node.js developer in 2023
  • TypeScript: Everything you need to learn about TypeScript in 2023
  • Frontend: Step by step guide to becoming a frontend developer in 2023
  • Backend: Step by step guide to becoming a backend developer in 2023
  • React: Step by step guide to become a React Developer in 2023
  • Angular: Step by step guide to become a Angular Developer in 2023
  • Vue: Step by step guide to become a Vue Developer in 2023

Why Learn JavaScript?

  1. JavaScript jobs are in high demand: According to the 2022 StackOverflow developer survey, Statista, University of California Berkeley, and devjobsscanner.com, JavaScript is the most in-demand programming language right now.
  2. JavaScript is simple: JavaScript is one of the easiest programming languages with many free tutorials online. You can get the basics down and then add in HTML and CSS to start building apps and websites.
  3. JavaScript developers are high in Salary: The average salary for a JavaScript developer has increased by almost 35% in the last 20 years. Moreover, the salary bump is still on an annual increase, with the average JavaScript developer now earning approximately $97,577 to $119,839 a year.
  4. JavaScript can be used everywhere: Learn just one language and use it everywhere. JavaScript can be used for front-end and back-end code (Full Stack). Once you have the fundamentals of JavaScript down, you can learn React, Next, Nust, React Native, Node.js, Express.js, and more.
  5. Activate a new part of your brain: Programming may not be something you’re familiar with and learning a new skill is a great way to stimulate your brain.

Happy learning! 🚀

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