Virtual DOM
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Virtual DOM
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. Updating the virtual DOM is comparatively faster than updating the actual DOM (via JavaScript). Thus, the framework is free to make unnecessary changes to the virtual DOM relatively cheaply. The framework then finds the differences between the previous virtual DOM and the current one, and only makes the necessary changes to the actual DOM. Svelte Svelte is a free and open-source front end component framework or language created by Rich Harris and maintained by the Svelte core team members. Svelte is not a monolithic JavaScript library imported by applications: instead, Svelte compiles H ... does not have a virtual DOM, and its creator Rich Harris calls the virtual DOM "pure overhead". Related techniques include Ember.js' Glimmer and Angular's incremental DOM. References {{Compu-stub Web development Object models ...
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JavaScript
JavaScript (), often abbreviated as JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2022, 98% of Website, websites use JavaScript on the Client (computing), client side for Web page, webpage behavior, often incorporating third-party Library (computing), libraries. All major Web browser, web browsers have a dedicated JavaScript engine to execute the Source code, code on User (computing), users' devices. JavaScript is a High-level programming language, high-level, often Just-in-time compilation, just-in-time compiled language that conforms to the ECMAScript standard. It has dynamic typing, Prototype-based programming, prototype-based object-oriented programming, object-orientation, and first-class functions. It is Programming paradigm, multi-paradigm, supporting Event-driven programming, event-driven, functional programming, functional, and imperative programming, imperative programming paradigm, programmin ...
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Document Object Model
The Document Object Model (DOM) is a cross-platform and language-independent interface that treats an XML or HTML document as a tree structure wherein each node is an object representing a part of the document. The DOM represents a document with a logical tree. Each branch of the tree ends in a node, and each node contains objects. DOM methods allow programmatic access to the tree; with them one can change the structure, style or content of a document. Nodes can have event handlers attached to them. Once an event is triggered, the event handlers get executed. The principal standardization of the DOM was handled by the World Wide Web Consortium (W3C), which last developed a recommendation in 2004. WHATWG took over the development of the standard, publishing it as a living document. The W3C now publishes stable snapshots of the WHATWG standard. In HTML DOM (Document Object Model), every element is a node: * A document is a document node. * All HTML elements are element nodes. * ...
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React (web Framework)
React (also known as React.js or ReactJS) is a free and open-source front-end JavaScript library for building user interfaces based on UI components. It is maintained by Meta (formerly Facebook) and a community of individual developers and companies. React can be used as a base in the development of single-page, mobile, or server-rendered applications with frameworks like Next.js. However, React is only concerned with state management and rendering that state to the DOM, so creating React applications usually requires the use of additional libraries for routing, as well as certain client-side functionality. Basic usage The following is a rudimentary example of using React for the web, written in JSX and JavaScript. import React from 'react'; import ReactDOM from 'react-dom/client'; const Greeting = () => ; const App = () => ; const root = ReactDOM.createRoot(document.getElementById('root')); root.render( ); based on the HTML document below. ...
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Elm (programming Language)
Elm is a Domain-specific language, domain-specific programming language for Declarative programming, declaratively creating web browser-based graphical user interfaces. Elm is purely functional programming, purely functional, and is developed with emphasis on usability, performance, and Robustness (computer science), robustness. It advertises "no Runtime (program lifecycle phase), runtime Exception handling, exceptions in practice", made possible by the Elm compiler's Type system#Static type checking, static type checking. History Elm was initially designed by Evan Czaplicki as his thesis in 2012. The first release of Elm came with many examples and an online editor that made it easy to try out in a web browser. Evan joined Prezi in 2013 to work on Elm, and in 2016 moved to NoRedInk as an Open Source Engineer, also starting the Elm Software Foundation. The initial implementation of the Elm compiler targets HTML, Cascading Style Sheets, CSS, and JavaScript. The set of core tool ...
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Svelte
Svelte is a free and open-source front end component framework or language created by Rich Harris and maintained by the Svelte core team members. Svelte is not a monolithic JavaScript library imported by applications: instead, Svelte compiles HTML templates to specialized code that manipulates the DOM directly, which may reduce the size of transferred files and give better client performance. Application code is also processed by the compiler, inserting calls to automatically recompute data and re-render UI elements when the data they depend on is modified. This also avoids the overhead associated with runtime intermediate representations, such as virtual DOM, unlike traditional frameworks (such as React and Vue) which carry out the bulk of their work at runtime, ''i.e'' in the browser. The compiler itself is written in TypeScript. Its source code is licensed under MIT License and hosted on GitHub. History The predecessor of Svelte is Ractive.js, which Rich Harris had develo ...
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Ember
An ember, also called a hot coal, is a hot lump of smouldering solid fuel, typically glowing, composed of greatly heated wood, coal, or other carbon-based material. Embers (hot coals) can exist within, remain after, or sometimes precede, a fire. Embers are, in some cases, as hot as the fire which created them. They radiate a substantial amount of heat long after the fire has been extinguished, and if not taken care of properly can rekindle a fire that is thought to be completely extinguished and can pose a fire hazard. In order to avoid the danger of accidentally spreading a fire, many campers pour water on the embers or cover them in dirt. Alternatively, embers can be used to relight a fire after it has gone out without the need to rebuild the fire – in a conventional fireplace, a fire can easily be relit up to 12 hours after it goes out, provided that there is enough space for air to circulate between the embers and the introduced fuel. They are often used for cooking ...
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Angular (web Framework)
Angular (also referred to as "Angular 2+") is a TypeScript-based, free and open-source web application framework led by the Angular Team at Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS. Differences between Angular and AngularJS Google designed Angular as a ground-up rewrite of AngularJS. * Angular does not have a concept of "scope" or controllers; instead, it uses a hierarchy of components as its primary architectural characteristic. * Angular has a different expression syntax, focusing on " for property binding, and "( )" for event binding * Modularity – much core functionality has moved to modules * Angular recommends the use of Microsoft's TypeScript language, which introduces the following features: **Static typing, including Generics ** Type annotations * Dynamic loading * Asynchronous template compilations * Iterative callbacks provided by RxJS. * Support to run Angular applications on ...
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Web Development
Web development is the work involved in developing a website for the Internet (World Wide Web) or an intranet (a private network). Web development can range from developing a simple single static page of plain text to complex web applications, electronic businesses, and social network services. A more comprehensive list of tasks to which Web development commonly refers, may include Web engineering, Web design, Web content development, client liaison, client-side/server-side scripting, Web server and network security configuration, and e-commerce development. Among Web professionals, "Web development" usually refers to the main non-design aspects of building Web sites: writing markup and coding. Web development may use content management systems (CMS) to make content changes easier and available with basic technical skills. For larger organizations and businesses, Web development teams can consist of hundreds of people (Web developers) and follow standard methods like Agil ...
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