In React, components can manage its own state or have their state managed by a parent component. Uncontrolled components are easier to use but offer less control, while controlled components offer more control. Controlled components are often used for forms or interactive components that require complex state management.
To validate React props using PropTypes, import the PropTypes library, define a propTypes object, and set the prop types for each prop in the object. Use the propTypes object to check if the props passed to a component match their expected types and values.
Node.js is a runtime environment for executing JavaScript code outside of a web browser. Express.js is a web application framework built on top of Node.js. In other words, Node.js is the foundation, and Express.js is a tool that makes it easier to build web applications with Node.js.
A custom hook is a reusable function that can be used in React components. It is a way to share code between components without having to write it all over again.