The Complete JavaScript Course 2026: From Beginner to Pro

Name: The Complete JavaScript Course 2026: From Beginner to Pro
Rating: 4.5 (58 reviews)

Learn JavaScript, DOM manipulation, async programming, error handling, and real-world front-end development from scratch

Created byHayk Simonyan

Last updated 1/2026

English

What you'll learn

Learn how JavaScript works, from the basics to more advanced concepts, while building practical projects
Build the confidence to call yourself a JavaScript developer
Understand how JavaScript works behind the scenes
Use HTML, CSS, and JavaScript together to build web pages
Write clean and modern JavaScript (JS) code
Work with variables, functions, arrays, and loops
Manipulate the DOM to build interactive UIs
Handle errors and debug code like a pro
Write and understand asynchronous JavaScript (callbacks, promises, async/await)
Build real projects using front end web development tools

Coding Exercises

This course includes our updated coding exercises so you can practice your skills as you learn.

Course content

6 sections • 53 lectures • 5h 5m total length

Welcome & Course Outline2:17
What is JavaScript?3:32
JavaScript in Action3:53
Explore how JavaScript runs in the browser by using developer tools to inspect HTML and CSS, access the console for logs and alerts, do arithmetic, and declare variables with let.
Setting Up Your Development Environment8:36
How JavaScript is Executed?6:20
JavaScript vs Java vs ECMAScript3:15
Clarifies the differences between JavaScript, Ecmascript, and Java, explains how JavaScript runs in the browser, and outlines ES6 and ES14 updates and the latest syntax covered in this course.

Welcome & Project Setup3:16
Variables7:03
master variable declaration with the let keyword, store and log data to the console in a calculator project, swap values using a temporary variable, and link script.js.
Variable Naming Best Practices8:20
Master JavaScript variable naming: use let over var, camelCase, and meaningful names. Avoid starting with numbers, reserved keywords, and invalid characters; prefer const by default, as shown in calculator variables.
Getting Input Values3:32
Functions7:26
Primitive Data Types5:29
Operators & Control Flow8:37
Advanced Operators12:35
Input Validation7:01
Switch Statements4:01

Welcome & Section Outline2:14
Loops10:08
Practice for loops
Practice while loops
Practice do...while loops
Loops Exercises and Solutions9:39
Practice using all loop types: for, while, and do while, by printing even numbers from 2 to 20, computing factorials, and building a guess-the-number game.
Arrays8:06
Array Manipulation
Arrays Exercise and Solution2:25
Objects4:54
this Keyword5:39
Destructuring, Spread and Rest Operators6:47
Applying Destructuring, Spread and Rest Operators
Exercises and Solutions for Destructuring, Spread and Rest5:24
Primitive vs Reference Types7:32
Explain how primitive and reference types behave in JavaScript, detailing memory allocation, copying, and destructuring for objects, arrays, and functions to prevent unintended mutations.
Scope & Closures5:59

Introduction to the DOM and the Quiz App4:45
Selecting DOM Elements6:06
Learn to select DOM elements in JavaScript using getElementById, querySelector, querySelectorAll, and getElementsByClassName to target quiz elements like question, choices, submit button, and result.
Creating & Manipulating DOM Elements5:45
Handling Events7:48
Submitting the Answer and Showing Results7:51
Attach a submit button listener to handle submission, compare the selected answer with the correct one, and increment the score; track the current question with global variables and load next.
Displaying the Final Score5:43
Collecting & Displaying Wrong Answers6:34

Syntax, Runtime & Logical Errors7:39
Using console.log for Debugging7:04
Throwing Custom Errors | try…catch blocks7:07
Using Browser Developer Tools for Debugging10:37
Using Conditional Breakpoints3:23
Learn to use conditional breakpoints to pause debugging only when specific conditions are met, such as a user with role of user, streamlining credential checks and code flow.
Recap & Exercises1:38
Debugging JavaScript Errors

Introduction & Weather Dashboard Project3:45
Understanding APIs & JSON6:48
Single-Threaded Model & Event Loop3:53
Callbacks & Promises5:01
Making HTTP Requests with Fetch6:04
Async / Await2:33
Populating the Weather Data7:15
Handling Asynchronous Errors4:42
Refactoring and Improving UX4:33
Using Timers (setTimeout and setInterval)5:11
Memory Leaks7:08
Explore how memory leaks arise in JavaScript from forgotten timers, closures, DOM references, and global variables, and learn to fix them with clearInterval, clearTimeout, and cleanup.
Course Recap1:30
Congrats on Completing the Course!1:29

Requirements

No prior programming experience needed, you’ll learn JavaScript from scratch
A basic understanding of HTML and CSS is a plus, but not a must.

Description

What the Class is About
This class is designed for beginners and those looking to advance their JavaScript skills. You’ll learn how JavaScript works, from the basics to more advanced concepts, while building practical projects.

What You Will Learn
This course covers a complete range of topics, including:

JavaScript Fundamentals: Variables, constants, data types, and control flow (if/else, switch).
Functions and Objects: Function declarations, arguments, this, and object creation.
DOM Manipulation: Selecting elements, updating attributes, and handling events.
Asynchronous JavaScript: Callbacks, Promises, Async/Await, and the Event Loop.
Debugging and Error Handling: Common errors, try/catch, custom errors, and using developer tools.
Advanced Concepts: Scopes, memory management, the single-threaded model, and the JavaScript engine.

Why Take This Class
Whether you’re starting from scratch or brushing up on advanced skills, this class provides a complete roadmap to track your progress step by step. You’ll understand JavaScript’s core concepts, explore its real-world applications, and learn how it works in the browser and beyond. By the end, you’ll be confident in building dynamic and interactive web applications.

What You Need
You’ll need a computer, a text editor (like VS Code), and a browser. All code snippets, examples, and a complete roadmap will be provided to ensure you stay on track.

Join the class to start your JavaScript journey or take your skills to the next level!

Who this course is for:

Beginners with zero coding experience who want to learn JavaScript from scratch
Aspiring web developers looking to build interactive websites using HTML, CSS, and JavaScript
Self-taught developers looking to solidify their JavaScript knowledge

The Complete JavaScript Course 2026: From Beginner to Pro

What you'll learn

Explore related topics

Coding Exercises

Course content

Introduction to JavaScript6 lectures • 28min

JavaScript Building Blocks (Part 1)10 lectures • 1hr 7min

JavaScript Building Blocks (Part 2)11 lectures • 1hr 9min

Document Object Model (DOM)7 lectures • 45min

Error Handling & Debugging6 lectures • 37min

Asynchronous JavaScript13 lectures • 1hr

Requirements

Description

Who this course is for: