The PropTypes concept described is used to describe expected prop types.

The PropTypes concept described is used to describe expected prop types.

• A. A Prop
• B. A PropType
• C. A PropName
• D. A PropDefinition

Answer: (B)

PropType is the term used to describe the type of a single prop in PropTypes. In React, you specify what props a component expects by assigning an object to component.propTypes, where each prop name maps to a validator like PropTypes.string or PropTypes.number. The descriptor that denotes the type of that single prop is PropType, which captures the expected data shape for that prop (string, number, object, etc.). That’s why this term fits the description of describing expected prop types. The other terms aren’t the standard descriptor for a prop’s type in this context.

PropType is the term used to describe the type of a single prop in PropTypes. In React, you specify what props a component expects by assigning an object to component.propTypes, where each prop name maps to a validator like PropTypes.string or PropTypes.number. The descriptor that denotes the type of that single prop is PropType, which captures the expected data shape for that prop (string, number, object, etc.). That’s why this term fits the description of describing expected prop types. The other terms aren’t the standard descriptor for a prop’s type in this context.