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Spread syntax provides another way to destructure arrays and objects. For arrays, it indicates that the elements should be used as the parameters in a function call or the items in an array literal. For arrays, it indicates that the elements should be used as the parameters in a function call or the items in an array literal.
In 2009, JSFiddle's predecessor, MooShell, was created by Piotr Zalewa as a website application which was exclusive to the MooTools community. [5] In 2010, Oskar Krawczyk joined the project as a developer, and the platform was made freely available under the name of JSFiddle.
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 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 ...
Syntax checking HTML, CSS, JavaScript (using JSHint) Some No JavaScript (using JSLint) No No HTML, JavaScript (using JSLint) HTML, CSS, JavaScript, TypeScript Tab support Yes Yes Yes Yes Some Yes Yes Yes Indent, new line keeps level optional setting that is on by default Yes Yes Yes very limited No Yes N/A (can't press Enter) No Yes Yes
Both JSLint and JSHint were lacking the ability to create additional rules for code quality and coding style. [3] After contributing to JSHint, Zakas decided to create a new linting tool in June 2013, ESLint (originally called JSCheck, but renamed a month later), where all rules are configurable, and additional rules can be defined or loaded at run-time.
ECMA-262 specifies only language syntax and the semantics of the core application programming interface , such as Array, Function, and globalThis, while valid implementations of JavaScript add their own functionality such as input/output and file system handling.
The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
Babel plugins transform syntax that is not widely supported into a backward-compatible version. For example, arrow functions, which are specified in ES6, are converted into regular function declarations. [9] Non-standard JavaScript syntax such as JSX can also be transformed. [10] [11]