redux

问题 Following the guide, I came to a sorts of middlewares are there for redux application. Redux Thunk, Redux Promise, Redux Promise Middleware, Redux Observable, Redux Saga, Redux Pack It is just a matter of preference around which middleware we choose. But I'm not asking for choosing a convention. I would like to know if there are any differences between them like performance, browser support, use cases, etc. Or anything else that I'm missing with. I tried a hard research for these but not able

问题 In my previous projects, I usually have only one connect(mapStateToProps, mapDispatchToProps)(App) . But when I check the official example today, I find there is almost one connect() for each container. what are the benefits to have multiple connect() ? 回答1: Imagine a Redux version of Stack Overflow's Q&A page. You'd have quite a few components: the question and its votes, answers and their votes, the Markdown editor for additional answers, the profile link at the top, and related and network

问题 I've currently started a new project based on Polymer Custom Build. I've modified the project in order to add usage of polymer-redux. Since then, when trying to build a bundled project using the command gulp build , I have the following problem [unknown-polymer-behavior] - Unable to resolve behavior ReduxBehavior . Did you import it? Is it annotated with @polymerBehavior? Declaring the ReduxBehavior is done using ReduxBehavior = PolymerRedux(store); which is not very usual. Anybody succeeded

问题 Not sure why I'm getting this error, it happened when I added connect from redux to my Login component, so I could connect my store . FAIL src/components/auth/Login.test.js ● Test suite failed to run Invariant Violation: Could not find "store" in either the context or props of "Connect(LoginContainer)". Either wrap the root component in a <Provider> , or explicitly pass "store" as a prop to "Connect(LoginContainer)". Index.js import React from 'react' import ReactDOM from 'react-dom' import {

问题 I have a universal react app that's using redux and react-router. I have several routes as follows: /2016 /2015 /2014 /2013 etc. Each route requires data from an API. Currently, i have the <Link> elements in the Navigation component dispatch an async action onClick , which populates the store with data from the API for that route. For MVP, i'm just overwriting the post: {} contents in the store with the new post contents when the route changes, that way we get any new content that was on the

问题 I get this the error _react.default.memo is not a function and wrapWithConnect . This is a react-native project and it worked fine before I used the connect function to connect my dispatch into my react component: Package Versions: "react": "16.5.0", "react-redux": "^6.0.1", "redux": "^4.0.1", "redux-logger": "^3.0.6", "redux-thunk": "^2.3.0", code const mapDispatchToProps = dispatch => { return { sendEmail: (email, navigateMap) => dispatch(sendEmail, navigateMap)) export default connect(null

问题 I'm using redux as a state container in a simple shooter game. State is completely deterministic, the only input the system receives is user input (eg. a weapon was fired, etc). My problem is that I have to track (and process) certain events, that happen during the game (eg. something was destroyed, etc), and I'm not quite sure how to do that. My current solution is that the reducer maintains an events array in the current state, and every reducer just appends events to it. FIRE_WEAPON+-+

问题 I have a reducer whereby I am retuning the appropriate state when an action is dispatched. Now I am calling an API at regular intervals so the result will trigger an action again and again. So what I want is that if the reducer state already has data then another reducer doesn't show the state as loading while the call is sent. It must maintain its loading state when receiving data the first time only. I hope I am able to explain it properly Here are my code snippets Loading state reducer

问题 When I try this sample code from react-bootstrap, I keep getting errors such as " Parameter 'context' implicitly has an 'any' type; "Property 'value' does not exist on type 'Readonly<{}>'." in form.tsx: class FormExample extends React.Component { constructor(props, context) { super(props, context); this.handleChange = this.handleChange.bind(this); this.state = { value: '' }; } getValidationState() { const length = this.state.value.length; if (length > 10) return 'success'; else if (length > 5

问题 I'm trying to update the cart-button on a project when the user adds an item to the cart. I have build parts of the site in React.js - like the cart, the cart button etc. configureStore.js: export default function configureStore(initialState) { const store = createStore( reducers, initialState return store } Action: export function updateCart(payload) { return { type: CART_UPDATE, payload: payload } } Reducer: export default function cart(state = {}, action) { switch (action.type) { case CART