redux

问题 I am trying to setup a project using webpack/react/redux etc. I have setup the project but I can't see the project files in the dev-tools in my browser. I searched online and found that using debug : true, devtool : 'source-map' in my webpack config file will make files appear in dev-tools but they still ain't showing up. I can only see my bundle.js in dev-tools My whole webpack.config.js file is: var webpack = require('webpack'); module.exports = { entry: [ 'webpack-hot-middleware/client', '

问题 For example, if we have an array 0 => San Francisco 1 => Taipei 2 => San Jose and use the index as the "key" for every <tr> element like this this.props.arrData.map((data, i) => { return ( <tr key={i}> // ... it should be fine. When we add to the end of array: 3 => Sacramento And the index to data mapping is still all good -- just one more mapping is added. However, I found that even if it is prepended to the array, and still use the index as the "key", it still work perfectly and don't know

问题 Where exactly should I deal with the problem of this component not loading with the desired state ? My render method causes the following error... Uncaught TypeError: Cannot read property 'email' of undefined ...even though the JSON.stringify line shows me that the email property does (eventually) exist. The console.log down in mapStateToProps confirms that state loads first without the any user property (thus causing the error). Behold my naive attempt to resolve this in my constructor

问题 I'm building a Header component which is used throughout my application. I'm using React and Redux (obvz) to hold a default state for the Header e.g. in the header reducer's default state argument: state = { showUserMenu: true, redirectUrl: '/' } This is perfect for all the components where this is true, but for some routes/components I want the header to not show the user menu. So when those components mount I dispatch an action to HIDE_USER_MENU. The problem is that because the default is

问题 What is the best approach to use one part of the redux state tree to update another part of the state. In particular, I have a simplified flashcard app example below. We have a list of words maintained by one reducer, and then another part of the state tree is maintained by a quiz reducer, which holds the currently chosen word. I would like the quiz reducer to have access to the list of words, and maybe even a computed (memoized) filtered subset of the words. What is the best approach here? /

问题 What is the best approach to use one part of the redux state tree to update another part of the state. In particular, I have a simplified flashcard app example below. We have a list of words maintained by one reducer, and then another part of the state tree is maintained by a quiz reducer, which holds the currently chosen word. I would like the quiz reducer to have access to the list of words, and maybe even a computed (memoized) filtered subset of the words. What is the best approach here? /

问题 Having changed the implementation of a function added to the DispatchProps of a component using react-redux I got the following error: yarn run v1.13.0 $ flow Cannot call this.props.<prop> because: • Either property <prop> is missing in ExternalProps [1]. • Or property <prop> is missing in ConnectProps [2]. However, the prop was part of the DispatchProps ; which is intersected with the mentioned props: type Props = ExternalProps & ConnectProps & DispatchProps . 回答1: The issue was apparently a

问题 My Redux is rusty to say the least, I am trying to import functions from API which returns a Promise. I want to add this Promise to the payload on action creator, but it complains that TypeError: Cannot read property 'getBetList' of undefined Here is my action creator: import { getBetList, getLatestPrices } from '../api/index'; export const GET_BET_LIST = 'GET_BET_LIST'; export const GET_LATEST_PRICES = 'GET_LATEST_PRICES'; export function fetchBetList() { const response = this.getBetList();

问题 update1 : updated image for better understanding I am trying to implement chip filters similar to googleflights. Right now when you select sports it will show sports1 it will replace sports by sports1. However, I wanted to insert a textbox, when I enter somevalue in the textbox and hit Enter the primary fee schedule value should change to the entered value. Can you tell me how to fix it? chip related code is in chip-selector and tab-demo since if I enter textbox tag. I am just getting string

问题 The following is my structure of data [ { "id": 1, "title": "Welcome to my playground", "description": "This is so fun to play with, you will like it <3", "comments": [ { "id": 1140406, "comment": "this is an example comment", "postId": 1 } ] }, ... ] And I'm trying to use immutable js to do this operation Get all the posts Search for a post I want to add comment to Adding the comments when the post is found The following is my code posts = posts.map((post) => { if(post.get('id') == payload