What is ComponentWillMount()
componentWillMount() is to make API calls once the component is initiated and configure the values into the state. To make an API call, use an HttpClient such as Axios, or…
What is refs?
Ref are an attribute of the DOM elements. The primary purpose of the refs is to find the DOM elements easily.
State the difference between getIntialState() and constructor()?
If you want to create one component by extending ‘React. Component’, the constructor helps you to initialize the State. But, if you want to create by using ‘Reat.createClass.’ then you…
How can we do server-side rendering in React?
We can use reaction serve to do the server-side rendering.
List down some of the methods in a react-dom package
Important methods for react-dom packages are: render() hydrate() createPortal() unmountComponentAtNode() findDOMNode()
Why do you need to use props.children?
This props.children allow you to pass a component as data to other components.
What are Controlled Components?
Controlled components are component which controls the input elements.
What is the main difference between createElement and cloneElment?
createElement is used by react to create react elements. cloneElement is used to clone an element and pass it new props.
What are Fragments?
You can use fragment keyword to group a list of children components without using any extra nodes to the DOM. For example : render() { return ( ); }
Explain react hooks
React hooks allows you to use State, and other React features without writing a class.