Context lets you “broadcast” such data, and changes to it, to all components below. Common examples where using context might be simpler than the alternatives include managing the current locale, theme, or a data cache. API React.createContext

If you’re familiar with the context API before Hooks, useContext(MyContext) is equivalent to static contextType = MyContext in a class, or to <MyContext.Consumer>. useContext(MyContext) only lets you read the context and subscribe to its changes.

Mar 29, 2018 · Version 16.3 introduces a new context API that is more efficient and supports both static type checking and deep updates. Note. The old context API will keep working for all React 16.x releases, so you will have time to migrate. Here is an example illustrating how you might inject a “theme” using the new context API:

Oct 23, 2018 · In React 16.3 we introduced the official Context API as a replacement to the previous Legacy Context API. const MyContext = React . createContext ( ) ; We’ve heard feedback that adopting the new render prop API can be difficult in class components.

Context cung cấp một cách làm cho phép chúng ta chia sẽ values giống như vậy giữa các components mà không cần truyền giá trị tới tất cả level trong component tree. Khi nào nên dùng Context; Trước khi bạn sử dụng Context; API. React.createContext; Context.Provider; Class.contextType; Context.Consumer

The legacy context API will be removed in a future major version. Use the new context API introduced with version 16.3. The legacy API will continue working for all 16.x releases. How To Use Context . This section documents a legacy API. See …

Context te permite “transmitir” dichos datos, y los cambios, a todos los componentes de abajo. Los ejemplos comunes en los que el uso de Context podría ser más simple que otras alternativas incluyen la administración de la configuración de localización, el tema o un caché de datos. API React.createContext

The legacy context API is error-prone, and will be removed in a future major version. It still works for all 16.x releases but will show this warning message in strict mode: Read the new context API documentation to help migrate to the new version.

Context memungkinkan Anda “menyiarkan” data tersebut, dan mengubahnya, ke semua komponen di bawah. Contoh umum di mana menggunakan context mungkin lebih sederhana daripada alternatif termasuk mengelola locale saat ini, tema, atau cache data. API React.createContext

context는 React 컴포넌트 트리 안에서 전역적(global)이라고 볼 수 있는 데이터를 공유할 수 있도록 고안된 방법입니다. 그러한 데이터로는 현재 로그인한 유저, 테마, 선호하는 언어 등이 있습니다.