I can’t figure out how to set default property values for my components using Typescript. This is the source code: class PageState { } export class PageProps { foo: string = “bar”; } export class PageComponent extends React.Component<PageProps, PageState> { public render(): JSX.Element { return ( <span>Hello, world</span> ); } } And when I try … Read more
Considering below hooks example import { useState } from ‘react’; function Example() { const [count, setCount] = useState(0); return ( <div> <p>You clicked {count} times</p> <button onClick={() => setCount(count + 1)}> Click me </button> </div> ); } Basically we use this.forceUpdate() method to force the component to re-render immediately in React class components like below … Read more
TLDR: Use defaultChecked instead of checked, working jsbin. Trying to setup a simple checkbox that will cross out its label text when it is checked. For some reason handleChange is not getting fired when I use the component. Can anyone explain what I’m doing wrong? var CrossoutCheckbox = React.createClass({ getInitialState: function () { return { … Read more
Basically, I have a react component, its render() function body is as below: (It is my ideal one, which means it currently does not work) render(){ return ( <div> <Element1/> <Element2/> // note: code does not work here if (this.props.hasImage) <ElementA/> else <ElementB/> </div> ) } 21 Answers 21
This question already has answers here: Error while creating new React app (“You are running `create-react-app` 4.0.3, which is behind the latest release (5.0.0)”) (17 answers) Closed 6 months ago. I got an error while creating a React application. How do I fix it? 6 Answers 6
Being a beginner to React world, I want to understand in depth what happens when I use {this.props.children} and what are the situations to use the same. What is the relevance of it in below code snippet? render() { if (this.props.appLoaded) { return ( <div> <Header appName={this.props.appName} currentUser={this.props.currentUser} /> {this.props.children} </div> ); } } 5 … Read more
What does the npm run eject command do? I do understand what other commands do like start, build, test. But no idea about eject. 5 Answers 5
I’m migrating a React with TypeScript project to use hooks features (React v16.7.0-alpha), but I cannot figure out how to set typings of the destructured elements. Here is an example: interface IUser { name: string; } … const [user, setUser] = useState({name: ‘Jon’}); I want to force user variable to be of type IUser. My … Read more
I am newb to reactjs, I want to include bootstrap in my react app I have installed bootstrap by npm install bootstrap –save Now, want to load bootstrap css and js in my react app. I am using webpack. webpack.config.js var config = { entry: ‘./src/index’, output: { path: ‘./’, filename: ‘index.js’ }, devServer: { … Read more
Recently, I looked at Facebook’s React framework. It uses a concept called “the Virtual DOM,” which I didn’t really understand. What is the Virtual DOM? What are the advantages? 14 Answers 14
