React (JavaScript library) In computing, React (also known as React.js or ReactJS) is a JavaScript library for building user interfaces.
It is maintained by Facebook and a community of individual developers and companies.
React can be used as a base in the development of single-page or mobile applications.
What is a React pure component?
Question
sagar
Pure Components in React are the components which do not re-renders when the value of state and props has been updated with the same values.If the value of the previous state or props and the new state or ...
The higher-order component (HOC) in React?
Question
sagar
React 16.8 introduces the concept of higher-order components.A higher-order component is a function that takes a component and returns a new component. A higher-order component (HOC) is the advanced technique in React.js for reusing a component logic.Higher-Order Components ...
Explain the purpose of render() in React?
Question
sagar
Each React component must have a render() mandatorily. It returns a single React element which is the representation of the native DOM component. If more than one HTML element needs to be rendered, then they must be grouped ...
what is diff b/w stateless(Functional) and stateful(Class) components in react?
Question
sagar
A stateless component is usually associated with how a concept is presented to the user. It is similar to a function in that, it takes an input (props) and returns the output (react element).A stateful component is always ...
class Components in React?
Question
sagar
A class component requires you to extend from React.Component and create a render function which returns a React element. all lifecycle hooks are coming from the React.Component which you extend from in class components. So if you need ...
Functional Components in React?
Question
sagar
A functional component is just a plain JavaScript function which accepts props as an argument and returns a React element. It is like a normal function with no render method. It has no lifecycle, so it is not ...
Types of Component in React?
Question
sagar
In ReactJS, we have mainly two types of components. They are Functional Components (Stateless) Class Components (Stateful)
What are the components of React?
Question
sagar
Components let you split the UI into independent, reusable pieces, and think about each piece in isolation.
What is JSX in React?
Question
sagar
JSX stands for JavaScript XML. JSX allows us to write HTML in React. JSX makes it easier to write and add HTML in React. This file makes applications robust and boosts its performance.JSX allows us to write HTML ...
Which function is used for updating the state of a component?
Question
sagar
A functional component with the useState hook and a class component with built-in state.Function Component = const [size, changeSize] = useState("You didn't press any button yet"); Class Component = this.setState({ size: "big", message: "big" });