When creating components, remember that they can be composed into bigger components and reused (in the same project, in other projects, by other developers). Therefore, it is a good practice to make explicit in your components which props can be used, which ones are required, and which types of values they accept.

Javascript Primitives PropTypes

PropTypes.array: Prop must be an array.
PropTypes.bool: Prop must be a Boolean value (true/false).
PropTypes.func: Prop must be a function.
PropTypes.number: Prop must be a number (or a value that can be parsed into a number).
PropTypes.object: Prop must be an object.
PropTypes.string: Prop must be a string.

Combined Primitives PropTypes


An object that could be one of many types, such as


Prop must be an array of a certain type, such as


Prop must be an object with property values of a certain type, such as


Prop must be an object taking on a particular shape. It needs the same set of properties, such as

Special PropTypes

PropTypes.node: Prop can be of any value that can be rendered: numbers, strings, elements, or an array.
PropTypes.element: Prop must be a React element.
PropTypes.instanceOf: Prop must be instance of a given class (this uses JS’s instanceof operator.), such as PropTypes.instanceOf(Message).
PropTypes.oneOf: Ensure that your prop is limited to specific values by treating it as an enum, like PropTypes.oneOf([‘News’, ‘Photos’]).

Custom PropType Validators


ReactJS: Prop Validation

Category: JavascriptProgramingReactJS

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