JavaScript® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles. Read more about JavaScript.
The JavaScript standard is called ECMAScript. As of 2012, all modern browsers fully support ECMAScript 5.1. Older browsers support at least ECMAScript 3. On June 17, 2015, the sixth major version of ECMAScript was published. This version is officially called ECMAScript 2015, but is commonly referred to as ECMAScript 6 or ES6.
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 {{Glossary("API","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.
နည်းပြသင်ခန်းစာများ
ကျွန်တော်တို့ရဲ့ နည်းပြသင်ခန်းစာများနဲ့ လေ့ကျင့်ခန်းများမှတစ်ဆင့် JavaScript နဲ့ဘယ်လို program လုပ်မလဲဆိုတာလေ့လာပါ။
နိဒါန်း
- JavaScript လမ်းညွှန်
- သင်က JavaScript ကိုအခုမှစတင်လေ့လာမယ့်သူဆိုရင် ဒီလမ်းညွှန်ကသင့်ကိုအထောက်အကူပြုပါလိမ့်မယ်။
- JavaScript နည်းပညာချုံငုံသုံးသပ်ချက်
- Web browser နဲ့ JavaScript landscape မိတ်ဆက်။
- Object Oriented JavaScript မိတ်ဆက်
- 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
===
, loose equality using==
, and the {{jsxref("Global_Objects/Object/is", "Object.is()")}} method.
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 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
- 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 JavaS 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")}}