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How to type a variable to be instance of a react component?

I have a component that requires a component instance as a prop to work. I need TS to throw an error if that prop is not an instance of a specific component.

How can I achieve that? Is there a utility type for this?

interface MyComponentProps {
  button: InstanceOfReactElement<RequiredButton>
}

function MyComponent({ button, ...props }: MyComponentProps) {
  ...
}

function RequiredButton(props) { ... }

// ❌ need typescript to throw error here if `button` is not `<RequiredButton />`
<MyComponent button={<p>whatever</p>} />

// ✅ no error here since `button` is instance of 'RequiredButton'
<MyComponent button={<RequiredButton />} />
about 4 years ago · Juan Pablo Isaza
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