![]() It provides an API that is consistent with Redux, enabling developers to create Redux-like stores that are local to component states. In February 2019, useReducer was introduced as a React hook in the 16.8 release. Many implementations of Flux have been created since its inception, perhaps the most well-known being Redux, which features a single store, often called a single source of truth. This pattern is sometimes expressed as "properties flow down, actions flow up". The stores, which can be thought of as models, can alter themselves in response to actions received from the dispatcher. The action is an object whose responsibility is to describe what has taken place: for example, an action describing one user "following" another might contain a user id, a target user id, and the type USER_FOLLOWED_ANOTHER_USER. Ī React component under the Flux architecture should not directly modify any props passed to it, but should be passed callback functions that create actions which are sent by the dispatcher to modify the store. ![]() įlux can be considered a variant of the observer pattern. Since its conception, Flux has been superseded by libraries such as Redux and MobX. When used with React, this propagation is accomplished through component properties. Flux features actions which are sent through a central dispatcher to a store, and changes to the store are propagated back to the view. To support React's concept of unidirectional data flow (which might be contrasted with AngularJS's bidirectional flow), the Flux architecture was developed as an alternative to the popular model–view–controller architecture. ![]() ![]() Common patterns of usage have emerged as the library matures. This allows the choice of whichever libraries the developer prefers to accomplish tasks such as performing network access or local data storage. It is designed specifically for building user interfaces and therefore does not include many of the tools some developers might consider necessary to build an application. React does not attempt to provide a complete application library. Import React from "react" /** A pure component that displays a message with the current count */ const CountDisplay = props => ) Common idioms ![]()
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