redux

Froala Editor crash after 11 times model changed in React

由 ☆樱花仙子☆ 提交于 2019-12-20 03:52:43
问题 I've built a simple editor online without identity, implemented in backend with Node.JS with Socket.IO, MongoDB , and client using React connecting Socket.IO. To create editor, I've used Froala Editor with react-froala-wysiwyg as plugins for React. I've deployed my app on Heroku at https://dontpad.herokuapp.com and it's working fine with multiple user (Socket works fine). This is my screenshot about how it worked with 7 user online once time, and it work when someone changes data: Error But I

react js mapStateToProps triggers Uncaught TypeError: Cannot read property 'map' of undefined

由 帅比萌擦擦* 提交于 2019-12-20 03:09:10
问题 I have an index.js which renders all tables in the database. _renderAllTables() { const { fetching } = this.props; let content = false; if(!fetching) { content = ( <div className="tables-wrapper"> {::this._renderTables(this.props.allTables)} </div> ); } return ( <section> <header className="view-header"> <h3>All Tables</h3> </header> {content} </section> ); } _renderTables(tables) { return tables.map((table) => { return <Table key={table.id} dispatch={this.props.dispatch} {...table} />; }); }

Connected component not receiving store props n Redux

由 a 夏天 提交于 2019-12-20 01:08:47
问题 I was doing a bit of refactoring and tried connecting a higher level component to redux using connect() but the component I'm connecting keeps giving me empty props. I've included the relevant code, I've structured my redux reducers into a ducks format, so the actions/creators and reducers are in one module file. The files are containers/login.js , presentation/login.js , presentation/logins.js , app.js and the root index.js . When I decided to rename some actions, files and reducers, moved

Redux的工作流程

由 十年热恋 提交于 2019-12-19 13:16:42
1.Redux 是一个专门用来管理数据业务或逻辑状态的框架，它也可以实现代码结构的规范化并提供组件之间通信的便利，而这两点，对于大型应用来说非常关键。 2.工作流程： Redux 三大原则 单一数据源 整个应用的 state 被存储在一个 Object tree 中，且只存在于唯一的Store中。 state 是只读的 唯一改变 state 的方法就是触发 action，action 是一个用于描述发生事件的普通对象，视图部分只需要表达想要修改的意图，所有修改都会被集中化处理。 使用纯函数来执行修改 为了实现根据 action 修改 state值，我们就需要编写 Reducer。它是一个纯函数，接收先前的 state 和 action 返回新的 state ,随着应用的变大，你可以将它拆成多个小的 Reducer ,分别独立操作 state tree 中的不同部分。 2.具体工作步骤 Action const add =()=>{ return { type:"add", data:id, } } 上边函数返回的就是一个 Action,它是一个包含 type 和 data 的对象 。 Action 的作用就是告诉状态管理器需要做什么样的操作，正如上边的例子，就是要添加一条信息，这样就定义了一个Action，而 data 就是你做这个操作需要的数据。 Reducer reducer

Minified code outside of NODE_ENV === 'production'. This means slower development build of Redux

由 空扰寡人 提交于 2019-12-19 13:10:12
问题 So this is the full error: You are currently using minified code outside of NODE_ENV === 'production'. This means that you are running a slower development build of Redux. I am using a 3rd party charting library, CanvasJS, which needs access to the global scope. When I import it within any of my modules it seems the actual code breaks when in the browser (probably a this problem). I solved it by using Webpack, and having gulp bundle the bundle.min.js with the minified Charting library. This

React-Redux and Connect - Why is my state not updating on click?

由 ∥☆過路亽．° 提交于 2019-12-19 10:55:30
问题 I am new to redux and am writing a simple voting front end which allows the user to vote on their favourite framework (Angular, React, Vue). When a user clicks on a framework they would like to vote for, I intend to increment the votes in the store by one. I'm using combineReducers and connect to facilitate this. However, after each click, the state is always one vote behind. After one vote the state is at 0. After 2 clicks, the vote state is at 1, etc. Here is my index.js file wherein I

Unable to display data in component with react and redux

由 末鹿安然 提交于 2019-12-19 10:20:58
问题 I'm trying to display some dummy data on my component, but I'm not seeing anything appearing on it. When I console.log the expected result I get [object Object] . I think I'm missing something with my actions , actionCreators and reducers . #actions/types.js export const FETCH_USERS = 'fetch_users'; #actions/index.js import { FETCH_USERS } from './types'; const user = [ { name: 'D/S' }, { name: 'Bob' }, { name: 'Juan' } ] export function fetchUsers() { return { type: FETCH_USERS, payload:

Flutter Redux Navigator GlobalKey.currentState returns null

由 混江龙づ霸主 提交于 2019-12-19 09:48:04
问题 I am developing Flutter with Redux. When a user starts an application, I want Redux to automatically dispatch an action . This action will make the Navigator push different routes dependently. This snippet provided by a Flutter dev member uses the GlobalKey to use the Navigator inside the middleware . Following this, I organize my code as follows: main.dart void main() { final store = new Store(appStateReducer, middleware:createRouteMiddleware() ); runApp(new MyApp(store)); } class MyApp

Cancel componentWillUnmount if a form is incomplete

由 柔情痞子 提交于 2019-12-19 09:43:53
问题 I have a form setup with redux-form and basically want to create a scenario where if there's content filled in any of the form's inputs and you try to navigate away from the page you get a prompt. The intent is to cancel the page unmount or page nav if they click Cancel . I tried creating a conditional, that if fulfilled would just return but it still navigates away from the current page. This is probably natural and that I'm not privy to the react/react-router workflow just yet but for the

How should unsubscribe be handled in a react component when using redux?

由 百般思念 提交于 2019-12-19 06:51:08
问题 In my component I have the following: componentWillMount: function () { this.unsubscribe = store.subscribe(function () { this.setState({message: store.getState().authentication.message}); }.bind(this)); }, componentWillUnmount: function () { this.unsubscribe(); }, Not calling unsubscribe causes the following error: Warning: setState(...): Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. What I'd like to know
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