The strange thing is that while functional components get updated as expected (the first "service is enabled string) the class-based one is not (the green one): However, by removing the<React.StrictMode>wrapper, everything works as expected: // Doesn't workroot.render(<StrictMode><App/></...
However, that doesn't seem to work b/c the ref-forwarding component is an object and not a function: Am I using this incorrectly, or should I just use mobx-react? I had been using mobx-react but we only use functional components so figured I'd switch to mobx-react-lite to get the...
importReact,{Component}from'react';importlogofrom'./logo.svg';import'./App.css';import{observable}from'mobx';import{observer}from'mobx-react';//1.定义状态varappState=observable({timer:0});//2.创建视图@observerclassTimerViewextendsReact.Component{render(){return(Seconds passed:{this.props.appStat...
observer 主要是使用 useObserver 方法对 function component 进行包装,然后使用 react.memo 进行优化,避免不必要的渲染。我们装点关注 useObserver 方法。 exportfunctionobserver<Pextendsobject,TRef={}>(baseComponent:React.RefForwardingComponent<TRef,P>,options?:IObserverOptions){// The working of observer is e...
这里使用decorator装饰器语法，通过字符串的方式注入全局store，组件的this上将会添加属性globalStore,通过store中的funcType的变量来控制显示的组件，该变量变化时，渲染的组件也会根据条件变化（通过observer装饰器实现）。其外围容器的写法通常如下：其父组件通过mobx-react的provider包裹器来将全局的store作为...
自己定义一个react hook,让后就可以在我们自己的组件中使用了: functionuseUserData(){const{user,order}=useStores()return{username:user.name,orderId:order.id,}}constUserOrderInfo=observer(()=>{// Do not destructure data!constdata=useUserData()return({data.username}has order{data.orderId})}) 从...
日常 Web 前端开发用的必要 MobX API 其实只有observable和observer，用这两个工具函数即可实现各类需求：...
在create-react-app中使用装饰器 create-react-app ExampleApp npm run eject //非react npm install --save-dev babel-plugin-transform-decorators-legacy //针对react npm install babel-preset-stage-2 --save-dev npm install babel-preset-react-native-stage-0 --save-dev npm install --save mobx mobx...
在mobx 的状态层,每一个需要观察的属性都会添加一个观察者,可以称之为ObserverValue 有了观察者,那么就需要向观察者中收集listener,mobx 中有一个Reaction模块,可以对一些行为做依赖收集,在 React 中,是通过劫持render函数执行行为,进行的依赖收集 如何监听改变,用自定义存取器属性中的get和set,来进行的依赖收集和更...
const {observer}=mobxReact; const {Component}=React; const appState=observable({ count :0}); appState.inc=function(){this.count++; } appState.dec=function(){this.count--; } @observer class Counter extends Component{ render(){return(Counter: {this.props.store.count} + - ) } inc...