Webreducer是是伴随redux出现而流行起来的，我们先不用了解redux。单说reducer，简单来说 … WebMar 23, 2024 · The useReducer (reducer, initialState) hook accepts 2 arguments: the reducer function and the initial state. The hook then returns an array of 2 items: the current state and the dispatch function. import { useReducer } from 'react'; function MyComponent() {. const [state, dispatch] = useReducer(reducer, initialState); const action = {.
React详解--react之redux - 知乎 - 知乎专栏
WebRedux 是「React 全家桶」中极为重要的一员，它试图为 React 应用提供「可预测化的状态管理」机制。Redux 本身足够简单，除了 React，它还能够支持其他界面框架。所以如果要将 Redux 和 React 结合起来使用，就还需要一些额外的工具，其中最重要的莫过于 react-redux … WebReact 会将状态设置为你从 reducer 返回的状态。. 在这个例子中，要将状态设置逻辑从事 … howdens falmouth
Redux Fundamentals, Part 3: State, Actions, and Reducers
WebJul 19, 2024 · Let's employ useReducer to build a form in React! First let's make a functional component in React to hold our form. import React, {useReducer} ... We're going to call it with the initial form values from up above and a very simple reducer that will just assume all we want to change is the value on the given object. Web随着应用的增长，你可能会有许多这样的 context 和 reducer 的组合。这是一种强大的拓展 … WebThe useReducer Hook accepts two arguments. useReducer (, ) The reducer function contains your custom state logic and the initialState can be a simple value but generally will contain an object. The useReducer Hook returns the current state and a dispatch method. Here is an example of useReducer in a counter app: howdens faringdon oxfordshire