redux

connected-router error, a router may have only one child element

由 倾然丶 夕夏残阳落幕 提交于 2019-12-13 02:27:42
问题 ReactDOM.render( <Provider store={store}> <ConnectedRouter history={history}> { /* place ConnectedRouter under Provider */} <div> <Switch> <Route exact={true} path="/enthusiasm" component={Hello} /> <Route exact={true} path="/shipments" component={ShipmentsTable} /> <Route exact={true} path="/shipments/:pickUpId" component={ShipmentInfoPage} /> </Switch> </div> </ConnectedRouter> </Provider> , document.getElementById('root') as HTMLElement ); this is giving me an error saying, A <Router> may

Multiple Redux states in a single component - Typescript, React, Redux

由 不问归期 提交于 2019-12-13 02:12:49
问题 During authentication I return some internal ids that need to be carried into other components throughout the users life cycle. These values are kept in the authentication state, and all other relevant component logic is kept in the resources state. When I am running with multiple states in the component, it appears the authentication state overwrites the resources state in someway making the values I'm getting undefined despite the React state definitely having the values (Confirmed using

Separating presentational and logic components react/redux

由 此生再无相见时 提交于 2019-12-13 01:56:26
问题 I'm trying to clean up my components so that my container handles logic and my components are presentational only. I'm using Redux to connect my store to container/components. I'm trying this simple code, and I'm not sure why it is not working and what I'm missing. Previously I had, and it worked: var Main = React.createClass({ render: function(){ var style = this.props.hover; var actions = this.props.actions; return ( <div> <Bullet style={style} actions = {actions}/> </div> ); } }); function

Adding the labels to the react-select

由 青春壹個敷衍的年華 提交于 2019-12-13 00:30:10
问题 I am new to the react-js . here what I am trying to do is that, Now what I have tried is that const options = [ { value: 'chocolate', label: 'Chocolate' }, { value: 'strawberry', label: 'Strawberry' }, { value: 'vanilla', label: 'Vanilla' } ]; handleChange = (selectedOption) => { this.setState({ selectedOption }); console.log(`Option selected:`, selectedOption); } const { selectedOption } = this.state; <div className="row" style={styles}> <div className="col-12 d-flex"> <div className="col-md

middlware is not a function in react native

由 余生长醉 提交于 2019-12-12 23:53:26
问题 I am learning React-native and trying to implement redux. I have used React-redux & React-thunk perform a Async task from the Action. During the implementation, getting an error e.i. "middleware in not a function" when I run. If I comment out middleware and relevant code then everything works fine. Here is my code below. index.js import React, {Component} from 'react'; import ResetUserContainer from "./src/Components/resetUserContainer" import {Provider} from 'react-redux' import {createStore

React/Redux concept Vs server call requests

由 你。 提交于 2019-12-12 23:22:21
问题 I am wondering what is the best design approach between using a big state (store) and sql request in database. Let's say you have a Todo CRUD application. You can save the Todos list in store within Redux implementation. What is the best approach if you want to make complex statistics on those TODOs: Reducers or sql requests? For example, you want to get all todos for the current month: Reducers/store approach You can get all the todos list from the store and filter todos by date to get all

Redux: Another implementation for Selector Pattern

由 自作多情 提交于 2019-12-12 22:59:49
问题 The following example shows the usual implementation for the selector pattern. Then I'll discuss the problems of this implementation. After that I'll suggest another implementation that may prove useful. Usual implementation: Here is how the root reducer looks like along with public selectors: // reducers/index.js import { combineReducers } from 'redux'; import * as Items from './items'; import * as Login from './login'; export default combineReducers({ login: Login.reducer, items: Items

Redux Provider not passing down Props/State

由 断了今生、忘了曾经 提交于 2019-12-12 21:15:26
问题 I've created a React App using create-react-app and added Redux to it. After adding <Provider store={store} /> only the component that I pass as the argument (the main component) on connect is receiving the props/state. Why do the nested components not receive them? I will not paste the code here because I don't know what is causing the problem. Instead, here is the link to the entire App: https://github.com/KadoBOT/Box.es 回答1: Currently you are connect ing only MainPage or TemplatePage

react-redux框架之connect()与Provider组件 用法讲解

由 ￡可爱￡侵袭症＋ 提交于 2019-12-12 19:16:26
react-redux 在 react-redux 框架中，给我提供了两个常用的API来配合Redux框架的使用，其实在我们的实际项目开发中，我们完全可以不用 react-redux 框架，但是如果使用此框架，就如虎添翼了。 我们来简单聊聊这两个常用的API connect() Provider 组件 React-Redux 将所有组件分成两大类：UI 组件（presentational component）和容器组件（container component）。 1. UI 组件 UI 组件有以下几个特征： 只负责 UI 的呈现，不带有任何业务逻辑 没有状态（即不使用this.state这个变量） 所有数据都由参数（this.props）提供 不使用任何 Redux 的 API 下面就是一个 UI 组件的例子。 const Title = value => < h1 > { value } < / h1 > ; 因为不含有状态，UI 组件又称为"纯组件"，即它纯函数一样，纯粹由参数决定它的值。 2. 容器组件 容器组件的特征恰恰相反。 负责管理数据和业务逻辑，不负责 UI 的呈现 带有内部状态 使用 Redux 的 API 总之，只要记住一句话就可以了：UI 组件负责 UI 的呈现，容器组件负责管理数据和逻辑。 你可能会问，如果一个组件既有 UI 又有业务逻辑，那怎么办？回答是

Do I need componentWillReceiveProps and replaceProps when using ReactJS + Redux?

由 不想你离开。 提交于 2019-12-12 19:14:05
问题 i'm learning redux along side with react and did a first app to catch a few infos from Destiny and present for the user. The app has a select box where the user can choose one of the many activities and I save that activity to check with the API on the ActivityComponent, the problem is, I do that (get the activity identifier with redux and save on a store) then later I have to retrieve on the ActivityComponent but somehow I had to implement this: componentWillReceiveProps(nextProps) { this
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