Keeping components stateless in React is a core principle of building efficient and maintainable applications. Stateless components, also known as functional components, are simply JavaScript functions that accept props (properties) as input and return JSX (JavaScript XML) describing what should be rendered on the screen.
Stateless components are designed so component cannot manage their own data, instead they entirely rely on the data passed to them through props, making them pure functions of these props. This design approach not only enhances their reusability across different parts of an application but also simplifies testing, as they contain no internal logic or state that could introduce complexity. By rendering output solely based on the provided props, stateless components contribute to a more predictable and maintainable codebase.
Stateless components do not manage their own state. They rely solely on the props passed to them to determine what to render. This makes them predictable and easier to reason about.
Since stateless components are purely presentational, they can be reused in different parts of your application without modification.
Stateless components are generally more performing as React can optimize their rendering more easily.
If multiple components need to share the same data, move the state up to their nearest common ancestor component. This allows the child components to remain stateless.