Introduction to React - Lifecycle methods of a rea...

The three main categories of lifecycle methods in a React component are mounting methods, updating methods, and unmounting methods. Mounting methods are called when an instance of a component is being created and inserted into the DOM. These methods include constructor, componentWillMount, render, and componentDidMount. Updating methods are called when a component is being re-rendered due to changes in its state or props. These methods include componentWillReceiveProps, shouldComponentUpdate, componentWillUpdate, render, and componentDidUpdate. Unmounting methods are called when a component is being removed from the DOM. This method is componentWillUnmount. Rendering methods are not part of the lifecycle methods but are used to render the component to the DOM. The render method is required in every component and is responsible for rendering the component's JSX.