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...
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...
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...
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...
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'...
Again,没有银弹!如果我们页面的state结构很简单,没有复杂的嵌套,那就直接原生的JSON一把梭,没必要引入 immutable 了,高射炮打蚊子很浪费子弹的! 最后,再次推荐没事多读读官方的thinking in react,没事多读读,神清气爽;有问题多读读,提神醒脑。 相关链接...
Second, we're passing the state into a child component via a prop. This is a common pattern in React. Props are immutable. This makes components simpler to reason about: only state is mutable and state tends to only exist at the top of the component tree. ...
Immutability ImmutableState is read-only and cannot be simply overwritten MutableState can be overwritten simply with the new values Debugging EasyA lot of development tools available, pure functions and less abstraction. DifficultTools available are not sufficient that may result in unpredictable response...
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...