What are Stateless Components in React?

In React, stateless components are components that do not manage or hold their own internal state. They are purely focused on rendering UI based on the props they receive from their parent component. Since they don’t track any dynamic data themselves, they are also sometimes called "presentational components."

Stateless components are usually written as functional components, although technically class components without state can also be stateless.

Here’s a simple example:

function Greeting(props) {
  return <h1>Hello, {props.name}!</h1>;
}

In this example, the Greeting component simply receives a name prop and displays it. It doesn’t store or modify any state.

Key characteristics of Stateless Components:

• They receive data and callbacks exclusively through props.
• They focus on how things look rather than how they behave.
• They are easier to test and reuse because they don’t have side effects or internal state management.
• They can be optimized for performance (for example, using React.memo).

Why use Stateless Components?

• Simplicity: They are easier to write, understand, and maintain.
• Performance: They typically render faster than stateful components because they involve less complexity.
• Separation of concerns: They help keep UI and business logic separate.

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