react-redux

问题 Redux is a great library to use with React. However I am facing an issue, when you update root state through reducer it looks through all the components and re renders them if they are subscribed to that state. And this is causing me a lot of trouble because I am working on a complex project which has too many components and changing one's state does affect something else. For eg. I have a root state which composed of, RootState LayerState DocumentState blah, blah, blah And there are views

问题 I have a pure Component like this? interface Props { checkBoxTitleStyle?: any checkBoxBackgroundColor?: any onPressCheckBox?: (id, isChecked, selectedArray , options?: CheckBoxOptions) => void itemKey?: any mainContainerStyle?: any } class CheckBoxComponent extends PureComponent<Props> { constructor() render() } Now when i use this pureComponents in my otherComponent <CheckBoxComponent checkBoxKey={checkBoxKey} itemKey={get(item , 'id')} itemTitle={get(item , 'label', '')} isCheckBoxSelected=

问题 I have a drum app in React/Redux that's fully functional as it stands, but I want to be able to apply the active button style when the corresponding keypress is made just like it does when I physically click the button. As it stands, clicking the button does a transition but typing the corresponding key just plays the audio file, and isn't really linked to the button. Is there a way to mark the corresponding button active on keypress? Heres my CodeSandbox: https://codesandbox.io/s/k29r3928z7

问题 I have a drum app in React/Redux that's fully functional as it stands, but I want to be able to apply the active button style when the corresponding keypress is made just like it does when I physically click the button. As it stands, clicking the button does a transition but typing the corresponding key just plays the audio file, and isn't really linked to the button. Is there a way to mark the corresponding button active on keypress? Heres my CodeSandbox: https://codesandbox.io/s/k29r3928z7

问题 When I place the command npm update for an existing React project, this is displayed: npm WARN deprecated popper.js@1.16.1: You can find the new Popper v2 at @popperjs/core, this package is dedicated to the legacy v1 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents): npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"}) 回答1: npm WARN deprecated

问题 I am using highcharts-react-official in react-redux to create a drilldown chart. However when I click on a bar to drilldown, I also update some props which causes the component to re-render - which seems to prevent the drilldown event. I kind of gathered from Change series data dynamically in react-highcharts without re-render of the chart that I should use shouldComponentUpdate and getChart() to prevent re-render and instead dynamically update the data. My issue is that getChart() doesn't

问题 I am using highcharts-react-official in react-redux to create a drilldown chart. However when I click on a bar to drilldown, I also update some props which causes the component to re-render - which seems to prevent the drilldown event. I kind of gathered from Change series data dynamically in react-highcharts without re-render of the chart that I should use shouldComponentUpdate and getChart() to prevent re-render and instead dynamically update the data. My issue is that getChart() doesn't

问题 I'm trying to return the following in my reducer (react-redux) and it's giving me a syntax error: return { ...state, loginForm.email: action.payload.email } state = { loginForm: { email: '', password: '' } } so on I have babel preset stage 0 installed and es2015. This works fine: return { ..state, loginForm: action.payload } 回答1: Error you are getting because of the this key: loginForm.email It's not a valid object key. Write it like this: return { ...state, loginForm: { ...state.loginForm,

问题 I would like to assign a basename to my routes, which I can with BrowserRouter. I would also however like to specify a custom history so I can programatically navigate my users. Which I can do, with Router. I can't however, do both. Is it possible to extend one of the routers to support this or wrap function round it to add this? My current setup is this - import React from 'react'; import { Router, Switch, Route, Redirect } from 'react-router-dom'; import createHistory from './history';

问题 I'm trying to map data using below json format. An object having list of objects. '''{"pki_user_id":1234,"vc_username":null,"vc_password":null,"vc_name":"Muhammad","vc_email":"Muhammad.Bilal@gmail.com","b_isreset":false,"b_timeout":0,"_RoleDto":[{"pki_role_id":30019,"vc_rolename":"SuperUser","vc_roledesc":"Super User","vc_type":null,"i_group":0,"_MenuDto":null},{"pki_role_id":20015,"vc_rolename":"COMADM","vc_roledesc":"Competency Admin","vc_type":null,"i_group":0,"_MenuDto":null},{"pki_role