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Basic JavaScript

JS Tutorial
JS Tutorial JS Introduction JS Where To JS Output
JS Syntax
JS Syntax JS Statements JS Comments
JS Variables
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JS Operators
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JS If Conditions
JS Conditional JS If JS If Else JS Ternary JS Switch JS Booleans JS Logical
JS Loops
JS Loops JS Loop for JS Loop while JS Break JS Continue
JS Strings
JS Strings JS String Templates JS String Methods JS String Search JS String Reference
JS Numbers
JS Numbers JS Number Methods JS Number Properties JS Number Reference JS BigInt JS Bitwise
JS Functions JS Objects JS Dates
JS Dates JS Date Formats JS Date Get JS Date Set JS Date Reference
JS Arrays
JS Arrays JS Array Methods JS Array Search JS Array Sort JS Array Iterations JS Array Reference JS Array Const JS Typed Arrays JS Typed Methods JS Typed Reference
JS Sets
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JS Math
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JS RegExp
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JS Data Types
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JS Errors JS Debugging JS Events JS Programming
JS Control Flow JS Scope JS Hoisting JS Strict Mode JS Code Blocks JS Style Guide JS Best Practices JS Mistakes JS Performance
JS References
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JS UTF-8 Characters
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JS Advanced

JS Versions
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JS Functions
Function Definitions Function Arrows Function Parameters Function Invocation Function this Function Call Function Apply Function Bind Function Closures
JS Objects
Object Definitions Object Properties Object Methods Object Display Object Constructors Object this Object Destructuring Object Prototypes Object Iterations Object Management Object Get / Set Object Protection Object Reference
JS Classes
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JS Iterations
JS Loops JS Iterables JS Iterators JS Generators
JS Promises
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JS Modules JS HTML DOM
DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists
JS Windows
JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies
JS Web API
Web API Intro Web Validation API Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API
JS AJAX
AJAX Intro AJAX XMLHttp AJAX Request AJAX Response AJAX XML File AJAX PHP AJAX ASP AJAX Database AJAX Applications AJAX Examples
JS JSON
JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON Server JSON PHP JSON HTML JSON JSONP
JS jQuery
jQuery Selectors jQuery HTML jQuery CSS jQuery DOM
JS Graphics
JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.js
JS Examples
JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Website JS Syllabus JS Study Plan JS Interview Prep JS Bootcamp JS Certificate
JS Objects

JavaScript. W3Schools in English. Lessons for beginners

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JavaScript Tutorial. The basics of web programming

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Programmer "Praise the crazy! To rebels, troublemakers, losers, to those who are always untimely and out of order. To those who see the world differently. They don't follow the rules. They laugh at ambushes. You can quote them, argue with them, glorify or curse them. But it is impossible to ignore them. After all, they bring change. Pushing humanity forward. And let someone say: fools, we say: geniuses. After all, only a madman believes that he can change the world — and only because of that he changes it!"
Steve Jobs

Here is the best and most complete online JavaScript tutorial in English from the world's largest and most famous Internet resource for learning web technologies - the site W3Schools.com.

JavaScript is the world's most popular programming language.

JavaScript is the programming language of the Web.

JavaScript is easy to learn.

This tutorial will teach you JavaScript from basic to advanced.

Start learning JavaScript now »

Examples in Each Chapter

With our "Try it Yourself" editor, you can edit the source code and view the result.

Example

My First JavaScript

Try it Yourself »

Use the Menu

We recommend reading this tutorial, in the sequence listed in the menu.

If you have a large screen, the menu will always be present on the left.

If you have a small screen, open the menu by clicking the top menu sign ☰.

Learn by Examples

Examples are better than 1000 words. Examples are often easier to understand than text explanations.

This tutorial supplements all explanations with clarifying "Try it Yourself" examples.

If you try all the examples, you will learn a lot about JavaScript, in a very short time!

JavaScript Examples »

Why Study JavaScript?

JavaScript is one of the 3 languages all web developers must learn:

   1. HTML to define the content of web pages

   2. CSS to specify the layout of web pages

   3. JavaScript to program the behavior of web pages

This tutorial covers every version of JavaScript:

  • The Original JavaScript ES1 ES2 ES3 (1997–1999)
  • The First Main Revision ES5 (2009)
  • The Second Revision ES6 (2015)
  • The Yearly Additions (2016, 2017, 2018)

Learning Speed

In this tutorial, the learning speed is your choice.

Everything is up to you.

If you are struggling, take a break, or re-read the material.

Always make sure you understand all the "Try-it-Yourself" examples.

The only way to become a clever programmer is to: Practice. Practice. Practice. Code. Code. Code!

Test Yourself With Exercises

Exercise:

Create a variable called carName and assign the value Volvo to it.

    var  = "";

Commonly Asked Questions

  • How do I get JavaScript?
  • Where can I download JavaScript?
  • Is JavaScript Free?

You don't have to get or download JavaScript.

JavaScript is already running in your browser on your computer, on your tablet, and on your smart-phone.

JavaScript is free to use for everyone.

JavaScript References

W3Schools maintains a complete JavaScript reference, including all HTML and browser objects.

The reference contains examples for all properties, methods and events, and is continuously updated according to the latest web standards.

Complete JavaScript Reference »

JavaScript Quiz Test

Test your JavaScript skills at W3Schools!

Start JavaScript Quiz!

Pass the JavaScript exam — get your Certificate!

Online W3Schools Certification

Online W3Schools Certification

The ideal solution for professionals who need to balance work, family and career.

Over 25,000 certificates have already been issued!

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Get certified by completing the course on our website!

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