Which statement best describes a React component class?

Which statement best describes a React component class?

• A. It is a DOM element
• B. It is a blueprint that can produce multiple component instances
• C. It is a built-in HTML tag
• D. It is a function for styling

Answer: (B)

A React component class is a blueprint for creating UI pieces. It defines what the UI should render and how it should behave, and you can render it many times in your app by including its tag in JSX. It’s not a real DOM element by itself, nor a built-in HTML tag, nor a function for styling. When you define a class-based component, you extend React.Component and implement a render method that returns JSX. Each place you use that component creates a separate instance with its own props and state. That’s why describing it as a blueprint that can produce multiple component instances is the best statement.

A React component class is a blueprint for creating UI pieces. It defines what the UI should render and how it should behave, and you can render it many times in your app by including its tag in JSX. It’s not a real DOM element by itself, nor a built-in HTML tag, nor a function for styling. When you define a class-based component, you extend React.Component and implement a render method that returns JSX. Each place you use that component creates a separate instance with its own props and state. That’s why describing it as a blueprint that can produce multiple component instances is the best statement.