react-redux

问题 How to make conditional Routing, if and only if some conditions satisfies then only routing should happen. for example, if and only if the user enters the correct credentials login should be successful and the user should be able to see the welcome page. if we hit directly some URL like 'localhost:8080/welcome' that should not be navigated to welcome page, only after login welcome page should be seen. how can I achieve this, can anyone help me please..thank you. App.js import React, {

问题 I was reading the example docs for redux and I found this example of a container component. Can someone explain why in this case mapDispatchToProps is not needed here. As well, how is the function getting the dispatch function? import React from 'react' import { connect } from 'react-redux' import { addTodo } from '../actions' let AddTodo = ({ dispatch }) => { let input return ( <div> <form onSubmit={e => { e.preventDefault() if (!input.value.trim()) { return } dispatch(addTodo(input.value))

问题 I was reading the example docs for redux and I found this example of a container component. Can someone explain why in this case mapDispatchToProps is not needed here. As well, how is the function getting the dispatch function? import React from 'react' import { connect } from 'react-redux' import { addTodo } from '../actions' let AddTodo = ({ dispatch }) => { let input return ( <div> <form onSubmit={e => { e.preventDefault() if (!input.value.trim()) { return } dispatch(addTodo(input.value))

问题 Hi I am currently working on reactjs but in very basic level. I was trying to parse data from parent to child as well as child to parent. Parent to child is working properly but child to parent I couldn't. Here is the whole scenario... I have 3 components.. App, Home and User. From App component to Home component I want to parse data.. It is working properly. In Home component I have an Input field. If I write something and click on button then the input value will parse into App component.

问题 I just started to explore a bit this reactjs-redux boilerplate from davezuko which structure is fractal and I search a way to implement api endpoints to fetch data from mongodb. What are the approaches? The way to go is to create a new route and somehow interact with Koa server? 回答1: Reading over the boilerplate docs, it looks like the author included the Koa server only to load the hot module middleware. If you want to create your own API endpoints for mongodb, you might want to create your

问题 I am creating a React/Redux App compiled with Babel and bundled by Webpack. I want to implement a plugin feature. So I use Code Splitting with Dynamic import() to divide the main bundle for each plugin. However, if I need the same plugin in many place, Webpack will bundle a bundle for any import() used and iterate it (0.bundle.js, 1.bundle.js, ...). I try to use webpackChunkName: "MyPlugin" in comment in import() thinking that if I import a bunble with the same chunk name, it will replace the

问题 I am trying to follow the design pattern in https://github.com/reactjs/rfcs/issues/26 (see replies by bvaughn) and create ReactJS editable form, that reads data from the server, show then in the form fields, allows the use to edit values and then save those data back in database. I have some essential code: const mapStateToProps = state => { return { invoice: state.invoice, invoiceReady: state.invoiceReady, }; }; static getDerivedStateFromProps(nextProps, prevState) { if (nextProps.match

问题 Here in my code there are two Textinput where whatever i write and press TouchableOpacity , it generates QRCode , now when I am pressing QRCode for long time ,it is asking for gallery permission , but after that not save or download , Seriously I need help , Please . This is the git link , i have uploaded full code "https://github.com/abhigyan9301/QRCode" import React, { Component } from 'react'; //import react in our code. import { StyleSheet, View,TextInput, TouchableOpacity, Text,} from

问题 I am writing the unit test cases for the react containers, which are using the connect function. import React, { Component } from 'react'; import '../css/header.css'; import SignInInstruction from '../components/SingInInstruction'; import { connect } from 'react-redux'; import { fetchUserJd } from '../actions/index'; import NavBar from '../components/NavBar'; import { logoutUser } from '../../login/actions/index'; import { withRouter } from 'react-router-dom'; import { matchPath } from "react

问题 CHANGED, STILL NO ANSWER I followed this example: https://jsfiddle.net/4np9u17g/11/ I want to make it like there - after inputing value focus should go to next input. I use new syntax of refs and redux form, what am i doing wrong? constructor() { super(); this.field1 = React.createRef(); this.field2 = React.createRef(); this.field3 = React.createRef(); this.field4 = React.createRef(); this.field5 = React.createRef(); this.field6 = React.createRef(); } On change function (I made it really