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The Mozilla Developer Network (MDN) is an evolving learning platform for Web technologies and the software that powers the Web, including:
MDN's mission is simple: to provide complete, accurate, and helpful documentation for everything about the open Web, whether it's supported by Mozilla-built software or not. If it's an open technology exposed to the Web, we want to document it.
If you're not sure whether a particular topic should be covered on MDN, read: Does this belong on MDN?
How you can help
You don't need to be able to code—or to write—in order to be able to help MDN! We have lots of ways you can help, from reviewing articles to be sure they make sense, to contributing text, to adding sample code. In fact, there are so many ways to help that we have a Getting Started page that helps you pick tasks to do, based on your interests and how much time you have to spare!
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The MDN community
Our community is a global one! We have amazing contributors all around the world, in a number of languages. If you'd like to learn more about us, or if you need help of any kind with MDN, feel free to check out our discussion forum or IRC channel !
Using MDN content
Copyrights and licenses
MDN wiki documents have been prepared with the contributions of many authors, both within and outside the Mozilla Foundation. Unless otherwise indicated, the content is available under the terms of the Creative Commons Attribution-ShareAlike license (CC-BY-SA), v2.5 or any later version. Please attribute "Mozilla Contributors" and include a hyperlink (online) or URL (in print) to the specific wiki page for the content being sourced. For example, to provide attribution for this article, you can write:
About MDN by Mozilla Contributors is licensed under CC-BY-SA 2.5.
Note that in the example, "Mozilla Contributors" links to the history of the cited page. See Best practices for attribution for further explanation.
Note: See MDN content on WebPlatform.org for information about how to reuse and attribute MDN content on that site.
Code samples added to this wiki before August 20, 2010 are available under the MIT license; you should insert the following attribution information into the MIT template: "© <date of last wiki page revision> <name of person who put it in the wiki>".
Code samples added on or after August 20, 2010 are in the public domain. No licensing notice is necessary, but if you need one, you can use: "Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/".
If you wish to contribute to this wiki, you must make your documentation available under the Attribution-ShareAlike license (or occasionally an alternative license already specified by the page you are editing), and your code samples available under Creative Commons CC-0 (a Public Domain dedication). Adding to this wiki means you agree that your contributions will be made available under those licenses.
Some older content was made available under a license other than the licenses noted above; these are indicated at the bottom of each page by way of an Alternate License Block.
Important: No new pages may be created using alternate licenses.
Copyright for contributed materials remains with the author unless the author assigns it to someone else.
If you have any questions or concerns about anything discussed here, please contact Eric Shepherd.
The rights in the trademarks, logos, service marks of the Mozilla Foundation, as well as the look and feel of this web site, are not licensed under the Creative Commons license, and to the extent they are works of authorship (like logos and graphic design), they are not included in the work that is licensed under those terms. If you use the text of documents, and wish to also use any of these rights, or if you have any other questions about complying with our licensing terms for this collection, you should contact the Mozilla Foundation here: email@example.com.
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You can retrieve the content of a single page on MDN by adding document parameters to the URL to specify what format you want.
Linking to MDN
See this article for guidance on linking to MDN for best practices when linking.
Reporting problems with MDN
History of MDN
The Mozilla Developer Network (a.k.a. Mozilla Developer Center (MDC), a.k.a. Devmo) project started in early 2005, when the Mozilla Foundation obtained a license from AOL to use the original Netscape DevEdge content. The DevEdge content was mined for still-useful material, which was then migrated by volunteers into this wiki so it would be easier to update and maintain.
You can find more history of MDN on our 10th anniversary celebration page, including an oral history by some of the people who were involved.
Whether you want to learn more about who we are, how to be a part of Mozilla or just where to find us, you've come to the right place. To find out what drives us and makes us different, please visit our mission page.