reactjs

问题 I'm trying to write a React functional component that requests a list of people exposed across multiple pages in an API: https://swapi.dev/api/people/?page=9 I know there are currently nine pages, but this might change in the future, so I want my component to keep requesting pages until there are no more, and to accumulate and store the people in the "results" bit of each response body. I'm trying to do this with useState and useEffect hooks. Is there a common way of solving this problem that

问题 I'm having some issues when using shortid or any other unique uid generator. The moment I use shortid.generate() as key in a table, the anchor point of my Material UI Popover is thrown to its default position rather than appearing where the button is. Here's a sandbox! - try removing/adding back shortid.generate() from line 72. I even tried uniqueId from lodash and the same thing happens - not using a key does render the dialog on the right place though. I even changed versions of Material UI

问题 I have an code like this: import React, { Component } from 'react'; import {AppRegistry, StyleSheet, Text, TouchableHighlight, View,} from 'react-native'; import {LoginButton, ShareDialog} from 'react-native-fbsdk'; class RNSample extends Component { constructor(props) { super(props); const shareLinkContent = { contentType: 'link', contentUrl: 'https://www.facebook.com/', contentDescription: 'Facebook sharing is easy!' }; this.state = {shareLinkContent: shareLinkContent,}; }

问题 I have an code like this: import React, { Component } from 'react'; import {AppRegistry, StyleSheet, Text, TouchableHighlight, View,} from 'react-native'; import {LoginButton, ShareDialog} from 'react-native-fbsdk'; class RNSample extends Component { constructor(props) { super(props); const shareLinkContent = { contentType: 'link', contentUrl: 'https://www.facebook.com/', contentDescription: 'Facebook sharing is easy!' }; this.state = {shareLinkContent: shareLinkContent,}; }

问题 Hy I'm using the Apollo Client with React. I query the posts with many different variables. So I have one post in different "caches". Now I want to delete a post. So I need to delete this specific post from all "caches". const client = new ApolloClient({ link: errorLink.concat(authLink.concat(httpLink)), cache: new InMemoryCache() }); Postquery: export const POSTS = gql` query posts( $after: String $orderBy: PostOrderByInput $tags: JSONObject $search: String $orderByTime: Int ) { posts( after

问题 I have a very simple Demo component with props taking a generic parameter TVariables : type Variables = { limit: number; page: number; search?: string | null; sort?: string | null; sortOrder?: number | null; }; type Props<TVariables extends Variables> = { variables: TVariables; setVariables(variables: TVariables): void; }; function Demo<TVariables extends Variables>(props: Props<TVariables>) { return null; } But then, when I try to use it in conjunction with useState , it doesn't infer

问题 ERR! code 1 npm ERR! Command failed: /usr/bin/git clone -q git://github.com/react-navigation/react-native-tab-view.git /Users/nakul/.npm/_cacache/tmp/git-clone-818101c2 npm ERR! /Users/nakul/.npm/_cacache/tmp/git-clone-818101c2/.git: Permission denied npm ERR! npm ERR! A complete log of this run can be found in: npm ERR! /Users/nakul/.npm/_logs/2018-04-14T10_46_28_136Z-debug.log 回答1: Try chmod -R 777 ~/.npm then reinstall. Or rm -rf ~/.npm and reinstall. ~/.npm is a temp directory and can be

问题 ERR! code 1 npm ERR! Command failed: /usr/bin/git clone -q git://github.com/react-navigation/react-native-tab-view.git /Users/nakul/.npm/_cacache/tmp/git-clone-818101c2 npm ERR! /Users/nakul/.npm/_cacache/tmp/git-clone-818101c2/.git: Permission denied npm ERR! npm ERR! A complete log of this run can be found in: npm ERR! /Users/nakul/.npm/_logs/2018-04-14T10_46_28_136Z-debug.log 回答1: Try chmod -R 777 ~/.npm then reinstall. Or rm -rf ~/.npm and reinstall. ~/.npm is a temp directory and can be

问题 ERR! code 1 npm ERR! Command failed: /usr/bin/git clone -q git://github.com/react-navigation/react-native-tab-view.git /Users/nakul/.npm/_cacache/tmp/git-clone-818101c2 npm ERR! /Users/nakul/.npm/_cacache/tmp/git-clone-818101c2/.git: Permission denied npm ERR! npm ERR! A complete log of this run can be found in: npm ERR! /Users/nakul/.npm/_logs/2018-04-14T10_46_28_136Z-debug.log 回答1: Try chmod -R 777 ~/.npm then reinstall. Or rm -rf ~/.npm and reinstall. ~/.npm is a temp directory and can be

问题 The procedure for sharing data between components in a child-parent relationship is well documented and dealt with straightforwardly in the React docs. What is less obvious is the accepted way of how one shares state and arbitrary data between components that do not share a child-parent relationship. Flux is offered as a solution, and in the past I have rolled my own pub/sub system, but still there seems a great divide among reactjs developers in this arena. RxJS has been offered as a