JavaScript® (de regulă prescurtat ca JS) este un limbaj simplu, interpretat orientat pe obiecte având funcții first-class cunoscut ca limbajul de scripting pentru paginile web, dar care este utilizat în multe medii fără browser așa cum sunt node.js sau Apache CouchDB. Este un limbaj de scriptare bazat-pe-prototip, multi-paradigmatic care este dinamic și care oferă stiluri de programare funcționale, orientate pe obiect și imperative. Citește mai multe despre JavaScript.
The JavaScript standard is ECMAScript. As of 2012, all modern browsers fully support ECMAScript 5.1. Older browsers support at least ECMAScript 3. A 6th major revision of the standard is in the works and is expected to be finished around mid 2015.
This section of the site is dedicated to the JavaScript language itself, the parts that are not specific to Web pages, or other host environments. For information about APIs specific to Web pages, please see Web APIs and DOM.
JavaScript is not to be confused with the Java programming language. Java is a trademark or registered trademark of Oracle in the U.S. and other countries.
Tutorials
Learn how to program with JavaScript.
Introductory
- JavaScript Guide
- If you are new to JavaScript, this guide will walk you through the language.
- JavaScript technologies overview
- Introduction to the web browser JavaScript landscape.
- Introduction to Object Oriented JavaScript
- Introduction to the concepts of object oriented programming in JavaScript.
Intermediate
- A re-introduction to JavaScript
- An overview for those who think they know about JavaScript.
- JavaScript data structures
- Overview of available data structures in JavaScript.
- Equality comparisons and sameness
- JavaScript provides three different value-comparison operations: strict equality using
===
and loose equality using==.
Advanced
- Inheritance and the prototype chain
- Explanation of the widely misunderstood and under-estimated prototype-based inheritance.
- Strict mode
- A restricted variant of JavaScript.
- JavaScript typed arrays
- JavaScript typed arrays provide a mechanism for accessing raw binary data.
- Memory Management
- Memory life cycle and garbage collection in JavaScript.
Reference
Browse the complete JS 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 & operators
- Learn more about the behavior of JavaScript's operators
instanceof
,typeof
,new
,this
, and more. - Statements & declarations
- Learn how
do-while
,for-in
,for-of
,try-catch
,let
,var
,const
,if-else
,switch
, and more JavaScript statements and keywords work. - Functions
- Learn how to work with JS functions to develop your applications.
Tools & resources
Helpful tools while writing and debugging your JavaScript code.
- Firefox Developer Tools
- Scratchpad, Web Console, JavaScript Profiler, Debugger, and more.
- Firebug
- Edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.
- JavaScript Shells
- A JavaScript shell allows you to quickly test snippets of JavaScript code.
- TogetherJS
-
Collaboration made easy.
- Stack Overflow
- Stack Overflow questions tagged with "JavaScript".
- JavaScript versions and release notes
- Browse JavaScript's feature history and implementation status.
{{CommunityBox("JavaScript", "js-engine.internals", "mozilla.dev.tech.js-engine.internals", "js", "ES discuss|https://esdiscuss.org/|esdiscuss.org|ECMAScript standard discussion mailing list||SpiderMonkey|https://wiki.mozilla.org/JavaScript|Project page|Contribute to the JavaScript Engine||Twitter|https://twitter.com/SpiderMonkeyJS|@SpiderMonkeyJS|SpiderMonkey updates on Twitter")}}