react-redux

问题 In the "Favorite List" reducer I have two helper function "Add/Remove" item from the array the Add work well but Remove it does not update the store in the actual time, because I have a checker in my UI that checks if this song_id in the array or not and bassed on it I update the heart icon BUT it does not work well when I dispatch the remove Action, In Other Words " Not Re-render the component "!. Action File import {ADD_TO_FAVORITE, REMOVE_FROM_FAVORITE} from './types'; export const

问题 At react-redux's hooks documentation we are warned that useSelector "does not prevent the component from re-rendering due to its parent re-rendering, even if the component's props did not change," unlike connect This is news to me. Does connect prevent re-rendering where a normal child component would not re-render? More specifically, I'm asking about the difference in the re-rendering behavior of the below three scenarios when the parent component re-renders while the store and props remain

问题 I'm trying to update my React Redux state using the usual practice. You immutably copy your current state into the return function and then overwrite the properties which are to have a new value. My expected result is to have state.copy update to [ { webCopy: "", id: 0 }, { webCopy: "", id: 1 } ] Unfortunately, it's an empty array despite returning the copy value as a new array with a JS object inside. I've tried looking at StackOverflow search results for "react redux state not updating

问题 I'm trying to update my React Redux state using the usual practice. You immutably copy your current state into the return function and then overwrite the properties which are to have a new value. My expected result is to have state.copy update to [ { webCopy: "", id: 0 }, { webCopy: "", id: 1 } ] Unfortunately, it's an empty array despite returning the copy value as a new array with a JS object inside. I've tried looking at StackOverflow search results for "react redux state not updating

问题 I am using passport.js and jwt token to handle the user authentication state in my react app. After the user logs-in, I store the token in localStorage and so depending on whether there's a token or not in the localStorage, I will updated the isAuthenticated state property. Now, when a guest user (non-authenticated) user, opens the app, he should not be able to access the home-page of the app. So I devided the routes that the guest user can access and the authenticated user can access to two

问题 DISCLAIMER: This error has been mentioned on stackoverflow before but my case is different. I have had a problem with the user login which I have explained in this stackOverFlow question. I invite you to go and quickly take a look. So as I mentioned in that question in my root file I have this: App.js class App extends Component { render() { const authLinks = ( <Switch> <Route exact path="/" name="Login Page" render={props => <Login {...props} />} /> <Route exact path="/404" name="Page 404"

问题 I am trying to create toggle switch in my application and i am new to redux. Posting this question after trying very hard and looking eveywhere online.Please help. My Reducer is below: const initialState = { preview: "off", cards: }; const cardReducer = (state = initialState, action) => { switch (action.type) { case "FIND_ALL_CARDS": return { cards: action.cards }; case "DELETE_CARD": return { cards: state.cards.filter(card => card.id !== action.cardId) }; case "CREATE_CARD": return { cards:

问题 I am trying to create toggle switch in my application and i am new to redux. Posting this question after trying very hard and looking eveywhere online.Please help. My Reducer is below: const initialState = { preview: "off", cards: }; const cardReducer = (state = initialState, action) => { switch (action.type) { case "FIND_ALL_CARDS": return { cards: action.cards }; case "DELETE_CARD": return { cards: state.cards.filter(card => card.id !== action.cardId) }; case "CREATE_CARD": return { cards:

问题 I'm working on a personal project and I have trouble with checking if a user is logged in or not so that when they try to go to /login, it'll redirect them to the home page. Currently what my code does is the following: Defined my own Route components When checkIfSignedIn is called, it dispatches actions that set the isLoggedIn state to either True or False. The AuthenticatedRouter component checks if the store's isLoggedIn state is true or false and will either render the component or

问题 I'm working on a personal project and I have trouble with checking if a user is logged in or not so that when they try to go to /login, it'll redirect them to the home page. Currently what my code does is the following: Defined my own Route components When checkIfSignedIn is called, it dispatches actions that set the isLoggedIn state to either True or False. The AuthenticatedRouter component checks if the store's isLoggedIn state is true or false and will either render the component or