react-component

问题 I am new to React and Redux, I am actually creating a code of myself but I got stuck with a router kind of thing inside stateless component. So, Actually I need to route to a component by using this.props.history.push('/somepath'). This is not happening inside a stateless component. My Stateless component is import React from "react"; // eslint-disable-line no-unused-vars import "bootstrap/dist/css/bootstrap.min.css"; import "./header.css"; const Header = () => ({ handleAuthor() { this.props

问题 I want to create a scroll that repeats itself, again and again, i.e. when I keep scrolling to the top I reach the last row and when I scroll to the bottom I reach the first row again. I have tried searching components for the same, but the best I could find were these - react-native-infinite-scroll and this stackoverflow answer but both of them only tell about how can I load more data when I reach the ScrollView or ListView end. 回答1: I searched a lot for this type component but couldn't find

问题 This question already has answers here : Speech bubble with arrow (3 answers) Closed last year . I want to give the material-ui popover this following shape shown in the image. I have created the popover working Demo using react and shared the link for editing purpose. Any help ? => Working Demo I'm Sharing the code here also but it would be good if the stackblitz working demo would be in use for editing purpose: import React, { Component } from 'react'; import Popover,

问题 import React, { Component } from 'react'; import ReactDOM from 'react-dom'; export default class Game extends Component { constructor(props) { super(props); this.myRef = React.createRef(); this.check = this.check.bind(this); } drawBackground() { console.log("worked"); } check () { this.myRef.current.innerHTML = "Testing"; {this.drawBackground()} } render() { return ( <div> <h1 ref={this.myRef} id="foo">bar</h1> {this.check()} </div> ); } } I need to access the text inside h1 tag in the check

问题 Parent Component: import React, {Component} from "react"; import ShowWeatherDetails from "./ShowWeatherDetails" class ShowWeatherButtons extends Component { constructor(props) { super(props) this.state = { buttonCount: 0, displayDetail: false } this.createButtons = this.createButtons.bind(this) } ShowThisWeather = (event) => { event.preventDefault() this.setState({ displayDetail: true }) console.log("test") } createButtons = () => { let cResult = this.props.cityResult let crLen = this.props

问题 I have a react component that contains within it a number of sub-components. I want to wrap those sub-components in an anchor tag. Now, sometimes that anchor tag will link to a sub-page, other times it will link to an external page. Now, I'm Gatsby and that means whether or not I use an <a> tag or a <Link> component depends on whether or not I'm linking to an internal page ( <Link> ) or an external page ( <a> ). See here for more details: https://www.gatsbyjs.org/docs/gatsby-link/ Now, I

问题 Hi I am trying to call the method from parent component to child. I have researched lot i didn't get any good solution with child(functional component). if there is a solution can any explain me to solve this. APP.js import React from 'react'; import IntegrationDownshift from './members' class App extends React.Component { constructor(props) { super(props); this.state = { Name: "Name from state...", Description: "Description from state...", Data:[data] } } Clear(){ this.IntegrationDownshift

问题 I am using chartIQ library in my Create React App. I added it just by using script tag in my index.html file <script src="chartiq/js/chartiq.js"></script> and it works that way, but it does not feel right. Because I need this library only for one component and it would be better to import somehow this library only to this component. Is there any way to do this correcly? 回答1: You can use it in the following way: function loadScript(url, callback){ let script = document.createElement("script")

问题 I am trying to get my head around ReactJs context, and have finally made some progress to display the state name and countNumber. However I am still struggling to work out how to replace the current state, which is used in my formatCount() function. Can anyone let me know how you would do this in my example below? I would like to use the number in my context e.g. 5 in the method, formatCount(), so it would be something like formatCount() { const currentCount = {c.state.currentCount}; return

问题 I was trying to understand the React through the React library, but couldn't understand what context and updater is, which is passed in to the Component. Following was the code in the library. function Component(props, context, updater) { this.props = props; this.context = context; this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the // renderer. this.updater = updater || ReactNoopUpdateQueue; } What is the purpose of these things? 回答1: Context