encapsulate the router as a component to write a login status locally when the user logs in. If true returns a route normally, if it is false, jump to the login page. In order to prevent users from jumping directly to the inner page without logging in ...
what is the difference between react-router and react-router-dom? what is the difference between import {BrowserRouter as Router,Route,NavLink} from react-router-dom ; Router,Route,NavLink? 1. Why do route and NavLink have to be in Router? 2. Se...
import React, {Component} from react ; import Demo1 from . demo1.js import . App.css import {BrowserRouter as Router, Route} from react-router-dom ; import A from . main a.js import B from . main b.js import C from . ...
select how to match the background fields with the selected state of select. my operation is to splice the value. Is there a simple way < Select style= {{width: 120}} onChange= {this.handleselect.bind (this)} > { ...
componentWillMount () { let data = localStorage.getItem( name) this.setState({data}) < H1 >} < H1 > data is a string , not an object ...
look at the title, I guess you don t understand, ha, I don t understand either? Let me describe it in detail this is the case. I intend to store a data in redux. This data will be used in some sub-component of the application. The default value ne...
the case of multiple timers in the react page, as follows: list:[ { aimTime: 2018-5-27 10:30:00 }, { aimTime: 2018-5-27 10:30:00 }, { aimTime: 2018-5-27 10:30:00 } ] <div className="container"> ...
export class ProjectList extends Component{ constructor(props){ super(props) this.state={ project:[], } } componentDidMount(){ axios.get( http: 127.0.0.1:9090 pro pList ).then(res =>{ ...
the project is built with react scaffolding. The data is obtained from the backend service built by express-generator packaged file directory: srcservice: homepage: . is added to package.json. The index.html page can be directly run in build, but...
here is the code that does not use asynchronous action const mapDispatchToProps = (dispatch, ownProps) => { return { onLoadSuccessHandle: (weather) => { dispatch(loadSuccess(weather)) }, onLoadFailureHandle...
are there any articles that analyze the structure of these directories and the functions of files ...
import React from react ; import ReactDOM from react-dom ; import {HashRouter as Router, Route, Switch} from react-router-dom import {createStore, applyMiddleware, compose} from redux import thunk from react-thunk import {Prov...
let arr1 = ["", "", "", ...] let arr2 = [{1: "", 2: "A", 3: "205"},{1: "", 2: "", 3: "220"}, ...] let arr = [] [ { "": "", ""...
Hello. Such as the title. This is what I wrote in the code. step:1 to move the default list of small pictures from the top to the left, I set template Viewer.TEMPLATE = ( <div class="viewer-container"> + <div class=&...
encountered a problem, because using CSS Modules, to hash all the class names of the style, so as to avoid repetitive class name overwriting, but after doing so, the css introduced by the third-party library will also follow hash, but the class name on ...
as mentioned above, I use react-router4 to route my login. When I log in successfully, change the currentURL, stored in store and then listen to the change of store in Router, change the state, of Router with this.setState (), change the URL, of the pag...
when the mapDispatchToProps method is passed into the connect, the dispatch in the component is undefined; when the mapDispatchToProps method is not passed into the connect, the dispatch in the component can be obtained Why does this happen? ...
my index.html, in the react project introduces through cdn. : : {}react: : so I want to install MathJax, through npm but don t know how to use it. Has any god ever used this thing? Ask for detailed instructions on how to use it! Thank you so mu...
according to the documentation, Mobx, wants to get and call parameters in the form of inject in the sub-component, but there is a undefined problem? Timer.ts interface IProps { timerStore?: TimerStore; } interface State {} inject( timerStore ...
recently did a react project and found a bug, that shows normal when you click on the bottom navigation, and when you click quickly, when you switch between the home page and my module, my module will turn white. ...