How can I declare a PropType corresponding to a nullable number?

Question

I\'m looking for a PropType that means

\"this is required, and it will either be a number or be null\"

In other words,

Answer 1

Just use:

PropTypes.number

By default all prop types aren't required (i.e. allow null or undefined) unless you pop a .isRequired on the end of them.

You can see the full docs for proptypes here:

• https://reactjs.org/docs/typechecking-with-proptypes.html