I'm looking for a way to set up a PropType that accepts a boolean value, but also allows for

Currently, my code includes a Modal component with a prop called disableEscapeKeyDown. The PropType defines it as boolean | null, but when trying to use it in the ModalWindow function, I receive an error stating

Type 'boolean | null' is not assignable to type 'boolean | undefined'
.

It appears that the Material-UI Modal only accepts boolean | undefined, creating a conflict with the PropType definition. How can I resolve this mismatch?

Answer №1

Choice 1: Verify for null:

    <Modal
      open={open ?? false}
      onClose={onClose}
      disableEscapeKeyDown={disableEscapeKeyDown === null ? undefined : disableEscapeKeyDown}
    >

Alternatively, you can utilize ??:

disableEscapeKeyDown ?? undefined

Choice 2: Exclude & intersect with accurate type:

export default function ModalWindow({
  disableEscapeKeyDown = false,
}: Omit<ModalProps, "disableEscapeKeyDown"> & { disableEscapeKeyDown?: boolean }) {

Choice 3: Modify the definition of ModalProps:

type ModalProps = PropTypes.InferProps<Omit<typeof propTypes, "disableEscapeKeyDown">> & { disableEscapeKeyDown?: boolean };

Choice 4: Disregard TypeScript:

    <Modal
      open={open ?? false}
      onClose={onClose}
      //@ts-ignore
      disableEscapeKeyDown={disableEscapeKeyDown}
    >

Regrettably, it seems impossible to "overwrite" or alter how PropTypes.InferProps functions - even my attempts to redefine Requireable<T> and Validator<T> were unsuccessful. Therefore, the next best solution is to patch the outcomes of the type on your own.

Interactive Playground displaying all choices

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