react-redux

问题 what is the difference between html tag "/href" and navlink provided by react-router to navigate the page? I can use both in order to navigate page to the different URL, so why there was need of introducing Navlink or Link? 回答1: The href attribute would trigger a page refresh which would reset the application states. However the link and navlink of react-router doesn't trigger a page refresh. Since React is used to create single page applications most of the time make sure you choose Link or

问题 Profile.js The Profile screen fetches its data from the WebApi using redux and displayes the Image according to the imageUrl. The SelectImage() calls a function for users to open up the gallery and choose a new image. After choosing the Image, I would like the image to be shown on the screen and replace current value of this.props.items.imageUrl . I just started redux and implemented it to my application. I would like to update the state of redux and be accessed on other screens as well, as

问题 Profile.js The Profile screen fetches its data from the WebApi using redux and displayes the Image according to the imageUrl. The SelectImage() calls a function for users to open up the gallery and choose a new image. After choosing the Image, I would like the image to be shown on the screen and replace current value of this.props.items.imageUrl . I just started redux and implemented it to my application. I would like to update the state of redux and be accessed on other screens as well, as

问题 While I was trying to createStore in react-redux I get this strange error. I don't know why as I did this before in different app there it was working fine. TypeError: Object(...) is not a function ./src/index.js C:/projects/facebook/facebook-react/src/index.js:14 11 | import rootReducer from './rootReducer'; 12 | import registerServiceWorker from './registerServiceWorker'; 13 | > 14 | const store = createStore( 15 | rootReducer, 16 | composeWithDevtools(applyMiddleware(thunk)) 17 | ); View

问题 While I was trying to createStore in react-redux I get this strange error. I don't know why as I did this before in different app there it was working fine. TypeError: Object(...) is not a function ./src/index.js C:/projects/facebook/facebook-react/src/index.js:14 11 | import rootReducer from './rootReducer'; 12 | import registerServiceWorker from './registerServiceWorker'; 13 | > 14 | const store = createStore( 15 | rootReducer, 16 | composeWithDevtools(applyMiddleware(thunk)) 17 | ); View

问题 could you please tell me why I am getting this error: Objects are not valid as a React child (found: object with keys {seo_val, text_val}). If you meant to render a collection of children, use an array instead. I am trying to hit http request and try to make dropdown . import React from "react"; class DropDown extends React.Component { constructor(props) { super(props); console.log(this.props); } render() { const makeDropDown = () => { console.log(this.data); return this.props.data.map(x => {

问题 Uncaught Error: Actions must be plain objects. Use custom middleware for async actions..... Action file: import $ from 'jquery' import { phoneVerify } from '../actions/types' const verifyPhoneAsync = function (verification) { return { type: phoneVerify, payload: verification } } const verifyPhone = function (phone) { $.ajax({ url: 'api', type: 'POST', data: { mobile: phone }, dataType: 'json', success: (data) => { console.log(data) } }) } const verifyOtp = function (phone, otp) { return

问题 I'm retrieving data from a backend, the data structure is like this. Data Strucuture { "id": 154, "image_title": "iiisdd", "img_url": "*********", "created_at": "2019-07-18T19:44:49.805Z", "updated_at": "2019-07-18T19:44:49.805Z", "user_id": 1, "user": { "id": 1, "googleId": null, "username": "*******, "password": "$********", "email": "e*******", "created_at": "2019-06-23T18:57:17.253Z", "updated_at": "2019-06-23T18:57:17.253Z" }, "comments": [ { "id": 51, "comment_body": "owls life",

问题 I am new to ReactJS and working with Hooks. I want to set state for object. Here is my code: const StartPage = (props)=> { const [user,setUser] = useState('') const [password,setPassword] = useState('') const [info,setInfo] = useState({ email:'' ]}) const onUserChange=(e)=>{ const user = e.target.value setUser(user) } const onPasswordChange=(e)=>{ const password = e.target.value setPassword(password) } const onSubmit=(e)=>{ e.preventDefault() const myHeader = new Headers ({ 'APIKey':'*****',

问题 I am trying to get the search results to display on another page in React Js. For now, when I submit my search form, it will display the results on the same page which I don't want. I have been trying to do this for the past 4 hours (I am new to ReactJS) and I have been seeing a lot of suggestions online but nothing seems to work as I was hoping. I have even tried to use react redux, react router and much more example online but does not work, don't what I'm doing wrong. How can I approach it