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  1. www.mozilla.org › en-US › firefoxFirefox Developer Edition - Mozilla

    Get the latest features, fast performance, and the development tools you need to build for the open web. Firefox Developer Edition is no longer supported on Windows 8.1 and below. Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR 32-bit. Download a different build.

  2. developer.mozilla.org › enResources for - MDN Web Docs

    The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.

  3. developer.mozilla.org › en-US › docsJavaScript | MDN - MDN Web Docs

    • Overview
    • Tutorials
    • Reference

    JavaScript (JS) is a lightweight interpreted (or just-in-time compiled) programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB and Adobe Acrobat. JavaScript is a prototype-based, multi-paradigm, single-threaded, dynamic language, supporting object-oriented, imperative, and declarative (e.g. functional programming) styles.

    JavaScript's dynamic capabilities include runtime object construction, variable parameter lists, function variables, dynamic script creation (via eval), object introspection (via for...in and Object utilities), and source-code recovery (JavaScript functions store their source text and can be retrieved through toString()).

    This section is dedicated to the JavaScript language itself, and not the parts that are specific to Web pages or other host environments. For information about APIs that are specific 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). As soon as one browser implements a feature, we try to document it. This means that cases where some proposals for new ECMAScript features have already been implemented in browsers, documentation and examples in MDN articles may use some of those new features. Most of the time, this happens between the stages 3 and 4, and is usually before the spec is officially published.

    Do not confuse JavaScript with the Java programming language — JavaScript is not "Interpreted Java". Both "Java" and "JavaScript" are trademarks or registered trademarks of Oracle in the U.S. and other countries. However, the two programming languages have very different syntax, semantics, and use.

    JavaScript documentation of core language features (pure ECMAScript, for the most part) includes the following:

    See full list on developer.mozilla.org

    For complete beginners

    Head over to our Learning Area JavaScript topic if you want to learn JavaScript but have no previous experience with JavaScript or programming. The complete modules available there are as follows: JavaScript first steps Answers some fundamental questions such as "what is JavaScript?", "what does it look like?", and "what can it do?", along with discussing key JavaScript features such as variables, strings, numbers, and arrays. JavaScript building blocks Continues our coverage of JavaScript's key fundamental features, turning our attention to commonly-encountered types of code blocks such as conditional statements, loops, functions, and events. Introducing JavaScript objects The object-oriented nature of JavaScript is important to understand if you want to go further with your knowledge of the language and write more efficient code, therefore we've provided this module to help you. Asynchronous JavaScript Discusses 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. Client-side web APIs Explores what APIs are, and how to use some of the most common APIs you'll come across often in your development work.

    JavaScript guide

    JavaScript Guide A much more detailed guide to the JavaScript language, aimed at those with previous programming experience either in JavaScript or another language.

    Intermediate

    Understanding client-side JavaScript frameworks JavaScript frameworks are an essential part of modern front-end web development, providing developers with proven tools for building scalable, interactive web applications. This module gives you some fundamental background knowledge about how client-side frameworks work and how they fit into your toolset, before moving on to a series of tutorials covering some of today's most popular ones. JavaScript language overview An overview of the basic syntax and semantics of JavaScript for those coming from other programming languages to get up to speed. JavaScript data structures Overview of available data structures in JavaScript. Equality comparisons and sameness JavaScript provides three different value comparison operations: strict equality using ===, loose equality using ==, and the Object.is() method. Enumerability and ownership of properties How different methods that visit a group of object properties one-by-one handle the enumerability and ownership of properties. Closures A closure is the combination of a function and the lexical environment within which that function was declared.

    See full list on developer.mozilla.org

    Browse the complete JavaScript reference documentation.

    Standard objects

    Get to know standard built-in objects Array, Boolean, Date, Error, Function, JSON, Math, Number, Object, RegExp, String, Map, Set, WeakMap, WeakSet, and others.

    Expressions and operators

    Learn more about the behavior of JavaScript's operators instanceof, typeof, new, this, the operator precedence, and more.

    Statements and declarations

    See full list on developer.mozilla.org

  4. developer.mozilla.org › en-US › docsLearn web development | MDN - MDN Web Docs

    Sep 7, 2024 · After mastering the essentials of vanilla HTML, CSS, and JavaScript, you should learn about client-side web development tools, and then consider digging into client-side JavaScript frameworks. You should also consider learning the basic concepts of server-side website programming.

  5. aurora.mozilla.org › en-US › firefoxDownload and test future releases of Firefox for ... - Mozilla

    Build, test, scale and more with the only browser built just for developers. Firefox Developer Edition is no longer supported on Windows 8.1 and below. Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR 32-bit. Download a different build.

  6. support.mozilla.org › en-US › productsGetting Started | MDN Plus Help - Mozilla Support

    Apr 8, 2022 · You can upgrade your access to Mozilla Developer Network (MDN) Web Docs with a free or paid subscription to MDN Plus. Learn more.

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  8. firefox-source-docs.mozilla.org › devtools-userFirefox DevTools User Docs — Firefox Source Docs ... - Mozilla

    Download Firefox Developer Edition. Connecting the Developer Tools. If you open the developer tools using keyboard shortcuts or the equivalent menu items, they’ll target the document hosted by the currently active tab.