redux

问题 In my React Native app, if I have a stack navigator and I navigate from screenA to screenB with this.props.navigation.navigate('screenB') , is it possible that screenA would ever get un-mounted? The reason I ask is that when screenA mounts, I make an API call that will load a resource that will be available in all screens via Redux. I might navigate to screenB while that API call is still in progress. So I want to know if it's possible that my navigating to screenB too soon could prevent the

问题 I'm using react-redux-firebase and redux-firestore packages. I'm trying to connect firestore to redux using the useFirestoreConnect hook, but after calling this hook it gives me a TypeError like in this picture. I've searched in the GitHub issues, docs and here but I'vent fount any solution. The error: Uncaught (in promise) TypeError: Object(...) is not a function you see the whole error in this picture: The console.log error The TypeError returned 回答1: Hello guys I figure out where the

问题 I am using react-redux and redux-thunk in my application and there are two things I am trying to do: I want to be able to share the results of a GET request in two components. I know you can do this by connecting the two components to the store, but I want to make it so if the user lands on X page, then Y page cannot make the same GET request again (these two components are Thumbnail and Carousel). In other words, the GET request should be made once (not 100% sure what best practice is here

问题 I'm making SNS app with React Native & Firebase. I can create a comments in array of each Post, and show it as a Flatlist. But I don't know how to remove each comment. Please let me know where to check the document or link. Or give me a hint. (In fact, it's been stuck here for almost two weeks.) ----action/post export const getComments = (post) => { return (dispatch) => { dispatch({ type: "GET_COMMENTS", payload: orderBy(post.comments, "date", "desc"), }); }; }; export const addComment =

问题 I'm making SNS app with React Native & Firebase. I can create a comments in array of each Post, and show it as a Flatlist. But I don't know how to remove each comment. Please let me know where to check the document or link. Or give me a hint. (In fact, it's been stuck here for almost two weeks.) ----action/post export const getComments = (post) => { return (dispatch) => { dispatch({ type: "GET_COMMENTS", payload: orderBy(post.comments, "date", "desc"), }); }; }; export const addComment =

问题 I have a reducer test that is passing but throwing out this weird error at the end: console.error node_modules/redux/lib/utils/warning.js:14 No reducer provided for key "newProducts" src/reducer/index.ts import newLineItemReducer from "./newLineItemReducer"; import renewedLineItemReducer from "./renewedLineItemReducer"; export interface LineItemState{ renewedProducts: LineItem[] newProducts: LineItem[] } //used by both reducers export interface LineItem{ ... } // used by both "new" and

问题 I am using material ui. I want to show search icon in input field as shown in image I am using this API Here is my code I am able to show TextField but I am not able to add a search icon. Could you please add how to add ? <TextField id="standard-bare" defaultValue="Bare" margin="normal" /> 回答1: You need to use Input Adornments. For example: // imports import IconButton from "@material-ui/core/IconButton"; import InputAdornment from "@material-ui/core/InputAdornment"; import SearchIcon from "

问题 I have a react app running, and I wanted to add route based code-splitting using React.lazy to it. Currently my code is, import { PureComponent, cloneElement, Suspense, lazy } from 'react'; ... export const CartPage = lazy(() => import(/* webpackMode: "lazy", webpackPrefetch: true */ 'Route/CartPage')); ... <Suspense fallback={ this.renderFallbackPage() }> <NoMatchHandler> <Switch> ... <Route path="/cart" exact component={ CartPage } /> ... </Switch> </NoMatchHandler> </Suspense> Only

问题 I have a react app running, and I wanted to add route based code-splitting using React.lazy to it. Currently my code is, import { PureComponent, cloneElement, Suspense, lazy } from 'react'; ... export const CartPage = lazy(() => import(/* webpackMode: "lazy", webpackPrefetch: true */ 'Route/CartPage')); ... <Suspense fallback={ this.renderFallbackPage() }> <NoMatchHandler> <Switch> ... <Route path="/cart" exact component={ CartPage } /> ... </Switch> </NoMatchHandler> </Suspense> Only

问题 I have worked on a couple of projects using React.js. Some of them have used Flux, some Redux and some were just plain React apps utilizing Context. I really like the way how Redux is using functional patterns. However, there is a strong chance that developers unintentionally mutate the state. When searching for a solution, there is basically just one answer - Immutable.js. To be honest, I hate this library. It totally changes the way you use JavaScript. Moreover, it has to be implemented