JavaScript Roadmap: Learn Step-by-Step

To learn JavaScript, there’s so much to cover: basics, DOM, closures, async stuff, and more. But don’t worry, you’re in the right place, as I’ve put together a step-by-step JavaScript roadmap to guide you through everything in a logical order.

Let’s jump right into it!

Stage 1: Getting Started

Before you start, get comfortable with the basics:

Introduction: What JS is and why it’s awesome
Adding JS to HTML: Inline, internal, external scripts

💡Tip: If you want a detailed explanation with examples while following this roadmap, you can check out JavaScript tutorials on Learnify.

Stage 2: Core Concepts

Next, focus on the building blocks of JavaScript:

Data Types: string, number, boolean, undefined, null, symbol, bigint
Variables: var, let, const
Operators: arithmetic, comparison, logical, assignment
Truthy & Falsy Values
Equality Operators: == vs ===, reference comparison
Console Methods

Stage 3: Control Flow & Loops

Now you can start controlling how your code runs:

Conditional Statements: if, else, else if, switch
Loops: for, while, do…while, for…of, for…in

Stage 4: Functions & Scope

Let’s dive into functions:

Functions: declarations, expressions, arrow functions
Function Parameters and Arguments
Scope: block vs function vs global
Hoisting
Type Conversion & Coercion

Stage 5: DOM & Events

Make your pages interactive:

DOM Manipulation & Events
Optional Chaining & Nullish Coalescing (?., ??)

Stage 6: Arrays & Objects

Handle structured data confidently:

Arrays & Methods: map, filter, reduce, forEach, find
Objects: creation, access, nested objects
Shallow vs Deep Copy
Map, Set, WeakMap, WeakSet
Destructuring & Spread/Rest Operators
Template Literals

Stage 7: ES6 Modules & Utilities

Level up your code:

ES6 Modules: import/export
Dates & Math
Error Handling: try…catch
Timers: setTimeout, setInterval

Stage 8: Asynchronous JS

Understand async operations:

Call Stack & Event Loop
Callback Functions
Promises: resolve, reject, .then, .catch
async / await
Fetch API
Error Handling in Async Code

Stage 9: Advanced Concepts & Patterns

Let’s look at the advanced stuff:

Object-Oriented Programming (OOP)
Closures
IIFE (Immediately Invoked Function Expressions)
Currying & Memoization
Debounce & Throttle
bind, call, apply
this keyword in depth
Event loop + microtasks/macrotasks
Generators & Iterators
Garbage Collection

Prefer a Visual Roadmap?
You can also check out this step-by-step JavaScript roadmap in visual form here!

That’s all for today!

I hope you find this JavaScript roadmap helpful!

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