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React (also known as React.js or ReactJS) is a free and open-source front-end JavaScript library [4] [5] for building user interfaces based on components. It is maintained by Meta (formerly Facebook) and a community of individual developers and companies.
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. [2] : 5 [3] : 11 Being a syntactic sugar, JSX is generally transpiled into nested JavaScript function calls structurally similar to the original JSX.
A JavaScript library is a library of pre-written JavaScript code that allows for easier development of JavaScript-based applications, [1] especially for AJAX and other web-centric technologies. [2] They can be included in a website by embedding it directly in the HTML via a script tag.
A virtual DOM is a lightweight JavaScript representation of the Document Object Model (DOM) used in declarative web frameworks such as React, Vue.js, and Elm. [1] Updating the virtual DOM is comparatively faster than updating the actual DOM (via JavaScript) [2]. [citation needed] Thus, the framework is free to make necessary changes to the ...
MDN Web Docs. MDN Web Docs, previously Mozilla Developer Network and formerly Mozilla Developer Center, is a documentation repository and learning resource for web developers. It was started by Mozilla in 2005 [1] as a unified place for documentation about open web standards, Mozilla's own projects, and developer guides.
Learn how to enable JavaScript in your browser to access additional AOL features and content.
Using a technique called AJAX, JavaScript code can also actively retrieve content from the web (independent of the original HTML page retrieval), and also react to server-side events as well, adding a truly dynamic nature to the web page experience.
This allows the creation of dynamic web pages, because within a page JavaScript can: add, change, and remove any of the HTML elements and attributes; change any of the CSS styles; react to all the existing events; create new events; DOM tree structure. A Document Object Model (DOM) tree is a hierarchical representation of an HTML or XML ...