beginner
10 min read
JavaScript DOM Manipulation Practice Exercises
You have read about getElementById, textContent, createElement, and remove(). You understand what they do on paper. But understanding a method and feeling…
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Build JavaScript skills fast.
Learn JavaScript—the language of the web—and build experiences people can see, use, and share.
Browser as the laboratory
Build things people can experience
One of the best things about JavaScript is how quickly an idea can become visible. Change the code, refresh the page, click a button, and watch the browser respond. LearnJSFast takes you from the language fundamentals to the DOM, events, APIs, and interactive web development. Learn quickly, experiment freely, and start building experiences of your own.
Experience behind the lessons
LearnJSFast Team
Joe Chang
Joe Chang began his software engineering career in frontend development and has spent more than 20 years building and leading software across startups, research, financial technology, entrepreneurship, and production systems. After studying physics at New York University, he built a career through software whose results could be demonstrated in the real world. He has since taught more than 1,000 students and worked with universities and government programs on software and AI engineering education.
- Learn through immediate feedback. Use the browser as a place to experiment, observe results, and turn abstract programming ideas into visible behavior.
- Build a strong JavaScript mental model. Understand state, functions, objects, events, asynchronous work, and the connections between them.
- Turn learning into visible proof. Create interfaces and projects that make your growing engineering ability easy to demonstrate.
- Build a foundation for modern web development. Learn the JavaScript ideas that continue into frontend applications, APIs, tooling, and full-stack development.
- Build interactive AI experiences. Use JavaScript to connect AI models and APIs with interfaces people can actually see, control, and use.
Learning paths
Choose where to start
Browse tutorials by topic so you can move from basic concepts to practical JavaScript projects.
absolute beginner
8 articles
Getting Started with JavaScript
Meet JavaScript where it lives: in the browser. Set up your tools, run real code, inspect the result, and start changing what the page does.
Go learning pathbeginner
12 articles
JavaScript Fundamentals
Get comfortable with the building blocks behind JavaScript programs: values, variables, collections, comparisons, decisions, and repetition.
Go learning pathbeginner
10 articles
Functions and Events
Turn code into behavior with reusable functions, parameters, events, clicks, keyboard input, and form interactions.
Go learning pathbeginner
12 articles
DOM Manipulation Basics
Make web pages respond: select elements, change content and styles, create UI, and connect data to what users see.
Go learning pathbeginner
12 articles
Beginner JavaScript Projects
Turn JavaScript knowledge into visible projects with counters, to-do lists, quizzes, modals, sliders, storage, and live search.
Go learning pathFeatured tutorials
Start with the essentials
These beginner tutorials explain the core ideas before you write larger JavaScript programs.
absolute beginner
7 min read
What is JavaScript?
JavaScript is the language that turns a static web page into something that reacts to you. Click a button and a menu opens. Type into a form and it checks…
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absolute beginner
7 min read
Your First JavaScript Program
The fastest way to learn JavaScript is not to read about it. It is to write one line, run it, and watch the browser answer back. That first exchange—your…
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Recently updated tutorials
Fresh and improved lessons from the LearnJSFast library.
beginner
9 min read
Arrays and Objects Basics
A variable can hold one value—and that value can be a collection holding many related values. JavaScript arrays and objects are how you build those…
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beginner
7 min read
Arrow Functions Basics
JavaScript arrow functions let you write the same functions you already know in fewer lines. The idea isn't new—only the syntax is shorter.
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beginner
9 min read
Basic Operators in JavaScript
You've learned how to store values in variables. Now it's time to make those values do something. JavaScript operators are the verbs of your code—they add,…
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beginner
10 min read
Build a Click Counter
There's a moment in learning JavaScript when things stop being abstract. You've studied variables and functions. You've followed along with examples. But…
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beginner
16 min read
Build a Digital Clock with JavaScript
There is a small magic moment in every beginner programmer's life: the first time a page changes itself, with no click, no refresh, no input from you. The…
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beginner
13 min read
Build a JavaScript Quiz App
You've learned arrays, conditionals, click events, and DOM updates as separate lessons. Now it's time to see them work together. A quiz app is the perfect…
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