reactjs Archives - Page 20 of 24

React – changing an uncontrolled input

I have a simple react component with the form which I believe to have one controlled input: import React from 'react'; export default ...

May 4, 2022
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TypeScript and React – children type?

I have a very simple functional component as follows: import * as React from 'react'; export interface AuxProps { children: React.ReactNode } const ...

May 3, 2022
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How can I update the parent’s state in React?

My structure looks as follows: Component 1 - |- Component 2 - - |- Component 4 - - - |- Component 5 Component ...

May 3, 2022
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Correct modification of state arrays in React.js

I want to add an element to the end of a state array, is this the correct way to do it? this.state.arrayvar.push(newelement); this.setState({ ...

May 1, 2022
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Parse Error: Adjacent JSX elements must be wrapped in an enclosing tag

I am trying to set up my React.js app so that it only renders if a variable I have set is true. The ...

May 1, 2022
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React JSX: selecting “selected” on selected option

In a React component for a <select> menu, I need to set the selected attribute on the option that reflects the application state. ...

May 1, 2022
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Pros/cons of using redux-saga with ES6 generators vs redux-thunk with ES2017 async/await

There is a lot of talk about the latest kid in redux town right now, redux-saga/redux-saga. It uses generator functions for listening to/dispatching ...

May 1, 2022
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How to update nested state properties in React

I’m trying to organize my state by using nested property like this: this.state = { someProperty: { flag:true } } But updating state ...

May 1, 2022
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How to add multiple classes to a ReactJS Component?

I am new to ReactJS and JSX and I am having a little problem with the code below. I am trying to add ...

May 1, 2022
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How to specify a port to run a create-react-app based project?

My project is based on create-react-app. npm start or yarn start by default will run the application on port 3000 and there is ...

May 1, 2022
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