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Starting with ES6, the 6th version of the language, variables could be declared with var for function scoped variables, and let or const which are for block level variables. Before ES6, variables could only be declared with a var statement. Values assigned to variables declared with const cannot be changed, but their properties can.
The 6th edition, ECMAScript 6 (ES6) and later renamed to ECMAScript 2015, was finalized in June 2015. [ 4 ] [ 30 ] This update adds significant new syntax for writing complex applications, including class declarations ( class Foo { ...
JavaScript is the programming language of the Web. It is one of the 3 core web development technologies (the other two being HTML and CSS), and it is used on most web pages. Note that JavaScript is not related to Java; they are two distinctly different programming languages. Communication about JavaScript is highly jargonized. The following ...
Babel is a free and open-source JavaScript transcompiler that is mainly used to convert ECMAScript 2015+ (ES6+) code into backwards-compatible JavaScript code that can be run by older JavaScript engines. It allows web developers to take advantage of the newest features of the language. [4]
The ECMAScript specification is a standardized specification of a scripting language developed by Brendan Eich of Netscape; initially named Mocha, then LiveScript, and finally JavaScript. [7] In December 1995, Sun Microsystems and Netscape announced JavaScript in a press release. [8]
JSX (JavaScript XML, formally JavaScript Syntax eXtension) is an XML-like extension to the JavaScript language syntax. [1] Initially created by Facebook for use with React , JSX has been adopted by multiple web frameworks .
[1] The curriculum focuses on JavaScript and associated technologies including the Relational/NoSQL databases, Node.js, Express.js, jQuery, React, Redux. In 2015 Hack Reactor acquired Austin-based MakerSquare as "their first deal in a plan to develop a network of coding bootcamps" in an effort to "make a large dent in transforming the old ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 February 2025. High-level programming language Not to be confused with Java (programming language), Javanese script, or ECMAScript. JavaScript Screenshot of JavaScript source code Paradigm Multi-paradigm: event-driven, functional, imperative, procedural, object-oriented Designed by Brendan Eich of ...
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