🌐
Mozilla
developer.mozilla.org › en-US › docs › Web › JavaScript
JavaScript - MDN Web Docs - Mozilla
May 22, 2026 - JavaScript documentation of core language features (pure ECMAScript, for the most part) includes the following: ... For more information about JavaScript specifications and related technologies, see JavaScript technologies overview. Our learn web development core modules contain modern, up-to-date tutorials covering JavaScript fundamentals.
CSS
Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in HTML or XML (including XML dialects such as SVG, MathML or XHTML). CSS describes how elements should be rendered on screen, on paper, in speech, or on other media.
HTML
HTML (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content. Other technologies besides HTML are generally used to describe a web page's appearance/presentation (CSS) or functionality/behavior (JavaScript).
Fetch API
The Fetch API provides an interface for fetching resources (including across the network). It is a more powerful and flexible replacement for XMLHttpRequest.
Using the Fetch API
The Fetch API provides a JavaScript interface for making HTTP requests and processing the responses.
cross-browser documentation center on web technologies
A website screenshot started in: "Resources for Developers, by Developers Documenting web technologies, including CSS, HTML, and JavaScript, since 2005."
MDN Web Docs, previously Mozilla Developer Network and formerly Mozilla Developer Center, is a documentation repository and learning resource for web developers. It was started by Mozilla in 2005 as a unified … Wikipedia
Factsheet
Native name Mozilla Developer Network
Formerly Mozilla Developer Center
Type of site Wiki
Native name Mozilla Developer Network
Formerly Mozilla Developer Center
Type of site Wiki
🌐
Mozilla
developer.mozilla.org › en-US
MDN Web Docs - Mozilla
1 month ago - Documenting CSS, HTML, and JavaScript, since 2005. ... MDN turns 20! Let's look at how we started, how MDN became the most trusted resource for web developers, the impact it's had on the open web, and yes, there's cake, too.
Discussions

Is the MDN website by Mozzila a good source to learn Javascript?
it's a great reference. i use it all the time. it also has longer articles on some of the more in depth features, like the spread and rest operators. I'd trust what it publishes over any other source. however it's not a course on how to learn javascript, it's more along the lines of specific feature details and references. if you know that you want to know, mdn will absolutely give you in depth details about how it works. if you want to slot that into a wider context and find out all the things you should know so you can go look them up, a course somewhere else might be better. More on reddit.com
🌐 r/learnprogramming
11
10
August 13, 2022
Is MDN a good resource to read it like a book to have an overall and somewhat deep understanding of web development?
Yes it is, there's a lot to read but MDN teaches you from the very basic and is easy to understand. No doubt you will have a strong foundation if you go through it.. More on reddit.com
🌐 r/Frontend
17
13
November 1, 2023
Mozilla web docs is too good :)
I just found this so sweet lol, I love that they don't assume any skill level at all, it must feel amazing for someone that isn't tech-savvy. More on reddit.com
🌐 r/webdev
85
1304
April 15, 2023
Introducing the MDN Web Docs Front-end developer learning pathway
Beautiful. Will definitely take advantage of this resource when I get a chance. Thanks for sharing! More on reddit.com
🌐 r/javascript
1
16
June 12, 2020
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GitHub
github.com › mdn
MDN Web Docs · GitHub
1 month ago - MDN Web Docs is an open-source, collaborative project that documents web platform technologies, including CSS, HTML, JavaScript, and Web APIs.
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Mozilla
developer.mozilla.org › en-US › docs › Web › JavaScript › Guide
JavaScript Guide - MDN Web Docs - Mozilla
The JavaScript Guide shows you how to use JavaScript and gives an overview of the language. If you need exhaustive information about a language feature, have a look at the JavaScript reference.
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MDN Web Docs
developer.mozilla.org › en-US › docs › Learn_web_development › Core › Scripting
Dynamic scripting with JavaScript - Learn web development | MDN
JavaScript is a huge topic, with so many different features, styles, and techniques to learn, and so many APIs and tools built on top of it. This module focuses on the essentials of the core language, plus some key surrounding topics — learning these topics will give you a solid basis to ...
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MDN Web Docs
developer.mozilla.org › en-US › docs › MDN
MDN Web Docs is a free-to-use resource that documents ...
February 6, 2025 - A curated list of tutorials on MDN Web Docs and learning materials for beginners, intermediate-level, or expert web developers. Explore detailed tutorials for web technologies like CSS, JavaScript, HTML, and more.
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GitHub
github.com › shaijut › Mozilla-Javascript-Tutorial-Offline › blob › master › JavaScript MDN Web Docs.pdf
Mozilla-Javascript-Tutorial-Offline/JavaScript MDN Web Docs.pdf at master · shaijut/Mozilla-Javascript-Tutorial-Offline
MDN Javascript Docs for Offline use in doc and PDF version. - Mozilla-Javascript-Tutorial-Offline/JavaScript MDN Web Docs.pdf at master · shaijut/Mozilla-Javascript-Tutorial-Offline
Author   shaijut
Find elsewhere
🌐
Sennalabs
sennalabs.com › blog › what-is-mdn-web-docs-how-to-use-it-to-learn-javascript-faster
What Is MDN Web Docs? How to Use It to Learn JavaScript Faster? | SennaLabs
MDN Web Docs is a free resource maintained by Mozilla (the organization behind Firefox) and supported by contributions from developers worldwide. It’s an open platform that provides: In-depth documentation for HTML, CSS, and JavaScript
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freeCodeCamp
freecodecamp.org › news › the-mozilla-developer-network-what-it-is-and-how-to-use-it
MDN Web Docs — What It Is and How to Use It
February 1, 2020 - MDN Web Docs (formerly known as the Mozilla Developer Network or MDN) is a free resource for in-depth documentation on web standards such as HTML5, CSS, JavaScript, and much more.
🌐
Wikipedia
en.wikipedia.org › wiki › MDN_Web_Docs
MDN Web Docs - Wikipedia
June 25, 2026 - It also contains content contributed by Microsoft, Google, and Samsung who, in 2017, announced they would shut down their own web documentation projects and move all their documentation to MDN Web Docs. Topics include HTML, JavaScript, CSS, Web APIs, PWAs, Django, Node.js, WebExtensions, MathML, ...
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MDN Web Docs
developer.mozilla.org › en-US › docs › MDN › index.html
MDN Web Docs | MDN
A curated list of tutorials on MDN Web Docs and learning materials for beginners, intermediate-level, or expert web developers. Explore detailed tutorials for web technologies like CSS, JavaScript, HTML, and more.
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Medium
medium.com › @venusang › understanding-mdn-web-docs-javascript-syntax-2fc83914992a
Understanding MDN web docs JavaScript Syntax | by Venus Ang | Medium
December 11, 2019 - Take a look at the Syntax the MDN web docs provides for reduce() in it’s raw form: Reference link: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
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MDN Web Docs
developer.mozilla.org › en-US › docs › MDN › Writing_guidelines › Code_style_guide › JavaScript
Guidelines for writing JavaScript code examples - MDN Web Docs | MDN
This section explains the general guidelines to keep in mind while writing JavaScript code examples. The later sections will cover more specific details. Opinions on correct indentation, whitespace, and line lengths have always been controversial. Discussions on these topics are a distraction from creating and maintaining content. On MDN Web Docs, we use Prettier as a code formatter to keep the code style consistent (and to avoid off-topic discussions).
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Mozilla
developer.mozilla.org › en-US › about
About - MDN Web Docs
At MDN, our mission is to provide developers with the resources they need to create innovative and accessible web experiences. We offer a free, high-quality, and comprehensive platform that includes documentation on essential web technologies like CSS, HTML, JavaScript, and Web APIs.
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GitHub
github.com › mdn › content › blob › main › files › en-us › web › javascript › guide › index.md
content/files/en-us/web/javascript/guide/index.md at main · mdn/content
The official source for MDN Web Docs content. Home to over 14,000 pages of documentation about HTML, CSS, JS, HTTP, Web APIs, and more. - content/files/en-us/web/javascript/guide/index.md at main · mdn/content
Author   mdn
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daily.dev
daily.dev › home › blog › webdev › mozilla javascript: a comprehensive guide
Mozilla JavaScript: A Comprehensive Guide | daily.dev
May 25, 2026 - Asynchronous JavaScript Guide - A helpful look at doing things in JavaScript without waiting around. MDN Web Docs is packed with the latest and most accurate info on Mozilla JavaScript.
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GitHub
github.com › johannlilly › mdn-javascript
GitHub - johannlilly/mdn-javascript: MDN web docs assessments from Mozilla · GitHub
MDN web docs assessments from Mozilla. Contribute to johannlilly/mdn-javascript development by creating an account on GitHub.
Author   johannlilly
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GitHub
github.com › mdn › content › tree › main › files › en-us › web › javascript
content/files/en-us/web/javascript at main · mdn/content
The official source for MDN Web Docs content. Home to over 14,000 pages of documentation about HTML, CSS, JS, HTTP, Web APIs, and more. - content/files/en-us/web/javascript at main · mdn/content
Author   mdn
🌐
MDN
mdn2.netlify.app › en-us › docs › web › javascript
JavaScript | MDN
July 28, 2021 - For information about API specifics to Web pages, please see Web APIs and DOM. The standards for JavaScript are the ECMAScript Language Specification (ECMA-262) and the ECMAScript Internationalization API specification (ECMA-402). The JavaScript documentation throughout MDN is based on the ...