reactjs Archives - Page 22 of 24

What is the difference between using constructor vs getInitialState in React / React Native?

I’ve seen both used interchangeably. What are the main use cases for both? Are there advantages / disadvantages? Is one a better practice? ...

April 28, 2022
0 Comments

What is the difference between state and props in React?

I was watching a Pluralsight course on React and the instructor stated that props should not be changed. I’m now reading an article ...

April 27, 2022
0 Comments

Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: object

I am getting this error: Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for ...

April 26, 2022
0 Comments

A component is changing an uncontrolled input of type text to be controlled error in ReactJS

Warning: A component is changing an uncontrolled input of type text to be controlled. Input elements should not switch from uncontrolled to controlled ...

April 26, 2022
0 Comments

Detect click outside React component

I’m looking for a way to detect if a click event happened outside of a component, as described in this article. jQuery closest() ...

April 26, 2022
0 Comments

Show or hide element in React

I am messing around with React.js for the first time and cannot find a way to show or hide something on a page ...

April 25, 2022
0 Comments

Call child method from parent

I have two components: Parent component Child component I was trying to call Child’s method from Parent, I tried this way but couldn’t ...

April 21, 2022
0 Comments

React js onClick can’t pass value to method

I want to read the onClick event value properties. But when I click on it, I see something like this on the console: ...

April 20, 2022
0 Comments

How to set focus on an input field after rendering?

What’s the react way of setting focus on a particular text field after the component is rendered? Documentation seems to suggest using refs, ...

April 20, 2022
0 Comments

Difference between npx and npm?

I have just started learning React, and Facebook helps in simplifying the initial setup by providing the following ready-made project. If I have ...

April 20, 2022
0 Comments