What is the purpose of the render() method in a class component?
The render()
method in a class component is a fundamental part of React’s component lifecycle. Its purpose is to define what should be rendered to the DOM when the component is rendered or updated.
- Returning JSX: The primary purpose of the
render()
method is to return JSX that represents the UI of the component. - Component Re-rendering: Whenever the state or props of a component change, React will automatically call the
render()
method again to re-render the component and update the DOM with any changes. - Virtual DOM: React uses a virtual DOM to efficiently update the actual DOM. The
render()
method generates a virtual DOM representation of the component’s UI.
Top React Components Interview Questions & Answers
React Component is the building blocks of the React application. It is the core concept that everyone must know while working on React. In this tutorial, we will see the top React Components questions that can be asked in the interview.
Let’s discuss some common questions that you should prepare for the interviews. These questions will be helpful in clearing the interviews, especially for the frontend development or full stack development role.