JavaScript roadmap for learning the language

How to learn JavaScript step by step

1. 1

   Start with JavaScript basics

   Learn what JavaScript is, how to run code, how scripts are structured, and how variables and values work.

   Goal: You can read simple JavaScript programs and write small browser examples.

   Start with An Introduction to JavaScriptExplore Learn An introduction in JavaScript

   1. An Introduction to JavaScript
   2. Hello, world!
   3. Code structure
   4. Variables
   5. Data types
2. 2

   Build control flow and function fluency

   Practice comparisons, conditions, loops, functions, function expressions, and arrow functions.

   Goal: You can express decisions, repetition, and reusable behavior in JavaScript.

   Start with ComparisonsExplore Learn JavaScript Fundamentals in JavaScript

   1. Comparisons
   2. Conditional branching: if, '?'
   3. Loops: while and for
   4. Functions
   5. Arrow functions, the basics
3. 3

   Understand objects and data structures

   Move from primitives into objects, arrays, array methods, maps, sets, dates, JSON, and destructuring.

   Goal: You can model data, transform collections, and exchange structured values.

   Start with ObjectsExplore Learn Data types in JavaScript

   1. Objects
   2. Arrays
   3. Array methods
   4. Map and Set
   5. JSON methods, toJSON
4. 4

   Learn advanced functions and prototypes

   Study scope, closures, scheduling, decorators, binding, prototypes, and inheritance.

   Goal: You can reason about execution context, reuse behavior, and JavaScript's object model.

   Start with Variable scope, closureExplore Learn Advanced working with functions in JavaScript

   1. Variable scope, closure
   2. Scheduling: setTimeout and setInterval
   3. Function binding
   4. Prototypal inheritance
   5. Native prototypes
5. 5

   Use classes, modules, and errors

   Organize larger programs with classes, inheritance, modules, imports, exports, and error handling.

   Goal: You can structure maintainable JavaScript applications and handle failures clearly.

   Start with Class basic syntaxExplore Learn Classes in JavaScript

   1. Class basic syntax
   2. Class inheritance
   3. Error handling, "try...catch"
   4. Modules, introduction
   5. Export and Import
6. 6

   Master promises and async JavaScript

   Learn callbacks, promises, chaining, error handling, Promise APIs, microtasks, and async/await.

   Goal: You can write asynchronous JavaScript that is readable, debuggable, and reliable.

   Start with PromiseExplore Learn Promises, async/await in JavaScript

   1. Introduction: callbacks
   2. Promise
   3. Promises chaining
   4. Promise API
   5. Async/await
7. 7

   Practice browser APIs and real web work

   Apply JavaScript in the browser with DOM, events, forms, loading, fetch, storage, web components, and regular expressions.

   Goal: You can build interactive browser features and connect them to network and storage APIs.

   Start with Browser environment, specsExplore Learn Document in JavaScript

   1. Browser environment, specs
   2. DOM tree
   3. Event delegation
   4. Fetch
   5. LocalStorage, sessionStorage
   6. Patterns and flags