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Submitted URL: http://contile.services.mozilla.com/
Effective URL: https://developer.mozilla.org/en-US/
Submission: On November 02 via api from JP — Scanned from JP
Effective URL: https://developer.mozilla.org/en-US/
Submission: On November 02 via api from JP — Scanned from JP
Form analysis
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Text Content
* Skip to main content * Skip to search MDN Plus now available in your country! Support MDN and make it your own. Learn more ✨ MDN Web DocsOpen main menu * ReferencesReferences * Overview / Web Technology Web technology reference for developers * HTML Structure of content on the web * CSS Code used to describe document style * JavaScript General-purpose scripting language * HTTP Protocol for transmitting web resources * Web APIs Interfaces for building web applications * Web Extensions Developing extensions for web browsers * Web Technology Web technology reference for developers * GuidesGuides * Overview / MDN Learning Area Learn web development * MDN Learning Area Learn web development * HTML Learn to structure web content with HTML * CSS Learn to style content using CSS * JavaScript Learn to run scripts in the browser * Accessibility Learn to make the web accessible to all * MDN PlusMDN Plus * Overview A customized MDN experience * Documentation Learn how to use MDN Plus * FAQ Frequently asked questions about MDN Plus Search MDNClear search inputSearch Theme * Already a subscriber? * Get MDN Plus RESOURCES FOR DEVELOPERS, BY DEVELOPERS Documenting web technologies, including CSS, HTML, and JavaScript, since 2005. Search MDNClear search inputSearch Mandala //////////// //////////// //////////// //////////// //////////// //////////// //////////// ++++++ ++++++ ++++++ ++++++ ++++++ ++++++ ++++++{{{{ }}}} {{{{ }}}} {{{{ }}}} {{{{ }}}} {{{{ }}}} {{{{ }}}} ../../ ../../ ../../ ../../ ../../ ../../ ../../<></><></><></><></><></><></><></><></><></><></><></><></><></><></><></><></> FEATURED ARTICLES CSS INTRODUCING THE CSS CASCADE The cascade is an algorithm that defines how user agents combine property values originating from different sources. The cascade defines the origin and layer that takes precedence when declarations in more than one origin or cascade layer set a value for a property on an element. HTML <DIALOG>: THE DIALOG ELEMENT The <dialog> HTML element represents a dialog box or other interactive component, such as a dismissible alert, inspector, or subwindow. JavaScript — Dynamic client-side scripting ASYNCHRONOUS JAVASCRIPT In this module, we take a look at asynchronous JavaScript, why it is important, and how it can be used to effectively handle potential blocking operations, such as fetching resources from a server. Web APIs CANVAS TUTORIAL This tutorial describes how to use the <canvas> element to draw 2D graphics, starting with the basics. The examples provided should give you some clear ideas about what you can do with canvas, and will provide code snippets that may get you started in building your own content. LATEST NEWS * Revamp of MDN Web Docs Contribution Docs Newhacks.mozilla.org 2 days ago * The 100% Markdown Expeditionhacks.mozilla.org 2 months ago * Merging two GitHub repositories without losing commit historyhacks.mozilla.org 2 months ago RECENT CONTRIBUTIONS * fix: responsive design typosmdn/content 19 hours ago * `color-scheme`: Added explains for the `only` keywordmdn/content 20 hours ago * fix: typo in WebAssembly Javascript APImdn/content 20 hours ago * Update wrap to be more clear on what it doesmdn/content 20 hours ago * Update @font-face pagemdn/content 21 hours ago * Remove deprecated mediawiki.external macro from esmdn/translated-content 21 hours ago * security: remove references to https://serviceworke.rs/mdn/translated-content a day ago * Remove deprecated HTMLVersionInline macro from esmdn/translated-content a day ago * Markdown bolded rendering fails mdn/translated-content a day ago * Transitiveの訳の修正mdn/translated-content a day ago CONTRIBUTOR SPOTLIGHT YiTao Yin > There are millions of web developers in China, and many of them begin their > developer journey at MDN Web Docs. Contributing to MDN Web Docs is an > excellent way to help people who are starting out. Get involved → Mandala //////////// //////////// //////////// //////////// //////////// //////////// //////////// ++++++ ++++++ ++++++ ++++++ ++++++ ++++++ ++++++{{{{ }}}} {{{{ }}}} {{{{ }}}} {{{{ }}}} {{{{ }}}} {{{{ }}}} ../../ ../../ ../../ ../../ ../../ ../../ ../../<></><></><></><></><></><></><></><></><></><></><></><></><></><></><></><></> MDN logo Your blueprint for a better internet. * MDN on Twitter * MDN on GitHub MDN * About * Hacks Blog * Careers SUPPORT * Product help * Report a page issue * Report a site issue OUR COMMUNITIES * MDN Community * MDN Forum * MDN Chat DEVELOPERS * Web Technologies * Learn Web Development * MDN Plus Mozilla logo * Website Privacy Notice * Cookies * Legal * Community Participation Guidelines Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation. Portions of this content are ©1998–2022 by individual mozilla.org contributors. Content available under a Creative Commons license.