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  2. Cross-origin resource sharing - Wikipedia

    en.wikipedia.org/wiki/Cross-origin_resource_sharing

    CORS defines a way in which a browser and server can interact to determine whether it is safe to allow the cross-origin request. [1] It allows for more freedom and functionality than purely same-origin requests, but is more secure than simply allowing all cross-origin requests.

  3. React (software) - Wikipedia

    en.wikipedia.org/wiki/React_(software)

    The components are rendered to a root element in the DOM using the React DOM library. When rendering a component, values are passed between components through props (short for "properties"). Values internal to a component are called its state. [15] The two primary ways of declaring components in React are through function components and class ...

  4. React (JavaScript library) - Wikipedia

    en.wikipedia.org/wiki/React_component

    Currently, server components are most readily usable with Next.js.. Class components. Class components are declared using ES6 classes. They behave the same way that function components do, but instead of using Hooks to manage state and lifecycle events, they use the lifecycle methods on the React.Component base class.

  5. Same-origin policy - Wikipedia

    en.wikipedia.org/wiki/Same-origin_policy

    The same-origin policy does not prevent the browser from making GET, OPTIONS, and TRACE requests; it only prevents the responses from being read by user code. Therefore, if an endpoint uses a one of these "safe" request methods to write information or perform an action on a user's behalf, it can be exploited by attackers.

  6. JavaScript - Wikipedia

    en.wikipedia.org/wiki/JavaScript

    This is an accepted version of this page This is the latest accepted revision, reviewed on 15 December 2024. 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 ...

  7. Document Object Model - Wikipedia

    en.wikipedia.org/wiki/Document_Object_Model

    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. [2] Nodes can have event handlers (also known as event listeners) attached to them. Once an event is ...

  8. Unit testing - Wikipedia

    en.wikipedia.org/wiki/Unit_testing

    Unit testing, a.k.a. component or module testing, is a form of software testing by which isolated source code is tested to validate expected behavior. [ 1 ] Unit testing describes tests that are run at the unit-level to contrast testing at the integration or system level.

  9. Singleton pattern - Wikipedia

    en.wikipedia.org/wiki/Singleton_pattern

    A class diagram exemplifying the singleton pattern.. In object-oriented programming, the singleton pattern is a software design pattern that restricts the instantiation of a class to a singular instance.