reactjs

问题 I am trying to manage a react app with react router and node js server my router in react : <BrowserRouter> <Switch> <PrivateRoute token={token} Component={Payments} exact path="/payments"/> <PrivateRoute token={token} Component={User} exact path="/user"/> <PrivateRoute token={token} Component={User} exact path=""/> <PrivateRoute token={token} Component={User} exact path="/"/> </Switch> <BrowserRouter/> export const PrivateRoute = ({Component, ...rest,token}) => { return ( <Route {...rest}

问题 Im having trouble with the following code: My compnent: class Landing extends Component { state = { loginMethod: '', tournamentCode: -1, } } My Const: const Code = () => ( <div className="" style={{marginTop: 20}}> <input className="" style={{lineHeight: 1, height: 30, border:0, paddingLeft: 5}} placeholder="Tournament Code" onChange={e => this.setState({tournamentCode: e.target.value})} /> <Link to="/App"> <button className="" style={{marginLeft: 10, border: 0, outline: 'none', background: '

问题 I want to use react's setState with chrome API but I'm running into an issue... componentDidMount() { chrome.runtime.onMessage.addListener(function(request, sender) { if (request.action == "getSource") { this.setState({sourceCode: request.source}); } }); } I tried the following but chrome API does not recognize setState as a function, so then I tried to first save request.source as a variable... componentDidMount() { var source = ""; chrome.runtime.onMessage.addListener(function(request,

问题 I want to use react's setState with chrome API but I'm running into an issue... componentDidMount() { chrome.runtime.onMessage.addListener(function(request, sender) { if (request.action == "getSource") { this.setState({sourceCode: request.source}); } }); } I tried the following but chrome API does not recognize setState as a function, so then I tried to first save request.source as a variable... componentDidMount() { var source = ""; chrome.runtime.onMessage.addListener(function(request,

问题 I am making a table base on react-table v7 and react-window. I found other question on this site with the same question but almost they are using v6 - almost difference. Problem is the filter text field will lost focus after we type and even when we just touch the input (I know the table is re-render). But I cannot find any solution for days. Please help and thank you very much. Here is the code sanbox 回答1: You are using uniqied() for key i.e key={uniqid()} . So on every re-render, you are

问题 I'm having issues with Jest testing that a closure (an inner function) has been called after calling the outer function. I've tried using the spyOn with no positive result. This seems to be a relatively simple problem, to which I haven't found any results from googling. // helper.js export const bar = () => {} export const foo = () => { bar(); //How do I test that this has been called? } //helper.test.js import * as H from 'helper'; const barSpy = jest.spyOn(H, 'bar'); H.foo(); expect(barSpy)

问题 I'm having issues with Jest testing that a closure (an inner function) has been called after calling the outer function. I've tried using the spyOn with no positive result. This seems to be a relatively simple problem, to which I haven't found any results from googling. // helper.js export const bar = () => {} export const foo = () => { bar(); //How do I test that this has been called? } //helper.test.js import * as H from 'helper'; const barSpy = jest.spyOn(H, 'bar'); H.foo(); expect(barSpy)

问题 I'm new to Redux Saga, coming from Redux Thunk. In some situations, I need to know whether an API call fails or succeeds from inside the view from which I called the action. With Redux Thunk, I would do something like the following. My component and action creator would look like this: class MyComponent extends Component { componentDidMount() { this.props.actions.fetchItems() .then(result => { if (result.status === 'OK') { console.log('Request succeeded, take particular action in this view')

问题 I'm new to Redux Saga, coming from Redux Thunk. In some situations, I need to know whether an API call fails or succeeds from inside the view from which I called the action. With Redux Thunk, I would do something like the following. My component and action creator would look like this: class MyComponent extends Component { componentDidMount() { this.props.actions.fetchItems() .then(result => { if (result.status === 'OK') { console.log('Request succeeded, take particular action in this view')