Immutable Data 就是一旦创建,就不能再被更改的数据。对 Immutable 对象的任何修改或添加删除操作都会返回一个新的 Immutable 对象。 二、immutable在react中的使用 安装 npm install immutable 第二步:在reducer.js中,将数据转成immutable,返回数据也返回一个Immutable对象, 该对象中有searchFocused数据 import * as ...
city:’Newyork’}} } }这就是为什么建议保持react state尽可能平缓的原因，也可以考虑使用Immutab...
handleClick(e) {console.log(this.state) this.setState(preState => { console.log('***click...state') console.log(preState); console.log('***click...state') return preState.update(['person', 'name'], v => v + 'update') }) } 初始设置state 为immutable 结构,处理click时候,setSta...
PS:每次有疑问的时候,我强烈建议先把官方的 thinking in react 翻出来研读下,很多东西官方其实也提到了。 哪些状态属于state? 一个组件通常有很多状态,首先我们要识别出哪些是state。官方文档里是这样说的: To build your app correctly, you first need to think of the minimal set of mutable state that your...
Arrays are another type of mutable JavaScript objects you can store in state and should treat as immutable. Just like with objects, when you want to update an array stored in state, you need to create a new one (or make a copy of an existing one), and then set state to use the new...
bistateis a tiny package that allows you to work with the immutable state in a more mutable and reactive way, inspired by vue 3.0 reactivity API and immer. 🏠Homepage Benefits bistateis like immer but more reactive Immutability with normal JavaScript objects and arrays. No new APIs to learn...
Simple immutable state for React usingImmer ~700B minified and gzipped(not including React & Immer) Try it out alongside other state solutions Heavily inspired byreact-copy-write Install yarn add bey Example importReactfrom'react';import{render}from'react-dom';import{state,update,Subscribe}from'...
Introduction to MobX & React in 2020by Leigh Halliday,17 min. ReactNext 2016: Real World MobXby Michel Weststrate,40 min,slides. CityJS 2020: MobX, from mutable to immutable, to observable databy Michel Weststrate,30 min. OpenSourceNorth: Practical React with MobX (ES5)by Matt Ruby,42 mi...
Every React component maintains its local state object. The state management happens internally. The state object is mutable; mutating it is the key to developing dynamic React components that change in response to the user’s actions. The parent component can not mutate the state of its children...
The state is managed within the component Props are used in function parameter State is used as a variable declared in the function body Props are immutable i.e) their values cannot be changed once assigned States are mutable i.e) their values can be changed within a component In functional...