Theo's Typesafe Cult•17mo ago

Send setter to `props.children`

So I think this is silly, but at the same time I don't find a way out of it, so I am here asking for help. I am trying to make a Modal that can accept any children and that children will receive the setOpen fn to open/close the modal independently. Let's show some code:

interface AddGeneralModalProps
  extends DialogProps,
    VariantProps<typeof contentVariants> {}

const AddGeneralModal = ({ children, size }: AddGeneralModalProps) => {
  const [open, setOpen] = useState(false);

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button className={buttonVariants()}>Open Modal</Button>
      </DialogTrigger>
      <DialogContent className={cn(contentVariants({ size }))}>
        <DialogHeader>
          <DialogTitle>Modal Title</DialogTitle>
          <DialogDescription>
            Modal Desc
          </DialogDescription>
        </DialogHeader>

        {children}
      </DialogContent>
    </Dialog>
  );
};

export default AddGeneralModal;

// Usage:
const SpecificForm = () => {
  const { mutate } = api.model.post.useMutation({
    onSuccess: async () => {
      // Here I would like to close the modal
    },
  });

  return (
    <Form>
      <Button onClick={ () => mutate() }> Submit < /Button>
    </Form>
  )
}

const MyPage = () => {
  return (
    <AddGeneralModal>
      <SpecificForm />
    </AddGeneralModal>
  )
}

interface AddGeneralModalProps
  extends DialogProps,
    VariantProps<typeof contentVariants> {}

const AddGeneralModal = ({ children, size }: AddGeneralModalProps) => {
  const [open, setOpen] = useState(false);

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button className={buttonVariants()}>Open Modal</Button>
      </DialogTrigger>
      <DialogContent className={cn(contentVariants({ size }))}>
        <DialogHeader>
          <DialogTitle>Modal Title</DialogTitle>
          <DialogDescription>
            Modal Desc
          </DialogDescription>
        </DialogHeader>

        {children}
      </DialogContent>
    </Dialog>
  );
};

export default AddGeneralModal;

// Usage:
const SpecificForm = () => {
  const { mutate } = api.model.post.useMutation({
    onSuccess: async () => {
      // Here I would like to close the modal
    },
  });

  return (
    <Form>
      <Button onClick={ () => mutate() }> Submit < /Button>
    </Form>
  )
}

const MyPage = () => {
  return (
    <AddGeneralModal>
      <SpecificForm />
    </AddGeneralModal>
  )
}

As you can see my attempt is to generalize the Dialog component from Shadcn/ui but I really cannot wrap my head around on how to pass setOpen down to SpecificForm and also make TypeScript happy. Thanks for the help.

Solution:

My preferred way though is to hoist the state of the modal outside of the JSX and store it in a hook. ```tsx const useModal = () => { const [open, setOpen] = useState(false); ...

Jump to solution

7 Replies

Brendonovich•17mo ago

One way is to make children a render prop:

interface AddGeneralModalProps
  extends Omit<DialogProps, 'children'>,
    VariantProps<typeof contentVariants> {
  children: (p: ModalProps) => DialogProps['children']
}

export interface ModalProps {
  setOpen: (v: boolean) => void;
}

const AddGeneralModal = ({ children, size }: AddGeneralModalProps) => {
  const [open, setOpen] = useState(false);

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button className={buttonVariants()}>Open Modal</Button>
      </DialogTrigger>
      <DialogContent className={cn(contentVariants({ size }))}>
        <DialogHeader>
          <DialogTitle>Modal Title</DialogTitle>
          <DialogDescription>
            Modal Desc
          </DialogDescription>
        </DialogHeader>

        {children({ setOpen })}
      </DialogContent>
    </Dialog>
  );
};

export default AddGeneralModal;

// Usage:
const SpecificForm = (props: ModalProps) => {
  const { mutate } = api.model.post.useMutation({
    onSuccess: async () => {
      props.setOpen(false)
    },
  });

  return (
    <Form>
      <Button onClick={ () => mutate() }> Submit < /Button>
    </Form>
  )
}

const MyPage = () => {
  return (
    <AddGeneralModal>
      {(modalProps) => <SpecificForm {...modalProps }/>}
    </AddGeneralModal>
  )
}

interface AddGeneralModalProps
  extends Omit<DialogProps, 'children'>,
    VariantProps<typeof contentVariants> {
  children: (p: ModalProps) => DialogProps['children']
}

export interface ModalProps {
  setOpen: (v: boolean) => void;
}

const AddGeneralModal = ({ children, size }: AddGeneralModalProps) => {
  const [open, setOpen] = useState(false);

  return (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <Button className={buttonVariants()}>Open Modal</Button>
      </DialogTrigger>
      <DialogContent className={cn(contentVariants({ size }))}>
        <DialogHeader>
          <DialogTitle>Modal Title</DialogTitle>
          <DialogDescription>
            Modal Desc
          </DialogDescription>
        </DialogHeader>

        {children({ setOpen })}
      </DialogContent>
    </Dialog>
  );
};

export default AddGeneralModal;

// Usage:
const SpecificForm = (props: ModalProps) => {
  const { mutate } = api.model.post.useMutation({
    onSuccess: async () => {
      props.setOpen(false)
    },
  });

  return (
    <Form>
      <Button onClick={ () => mutate() }> Submit < /Button>
    </Form>
  )
}

const MyPage = () => {
  return (
    <AddGeneralModal>
      {(modalProps) => <SpecificForm {...modalProps }/>}
    </AddGeneralModal>
  )
}

Solution

Brendonovich•17mo ago

My preferred way though is to hoist the state of the modal outside of the JSX and store it in a hook.

const useModal = () => {
  const [open, setOpen] = useState(false);

  // any other modal-related state can go in this hook
  
  return { open, setOpen }
};

interface AddGeneralModalProps
  extends DialogProps,
    VariantProps<typeof contentVariants> {
  modal: ReturnType<typeof useModal>
}

const AddGeneralModal = ({ children, size, modal }: AddGeneralModalProps) => {
  return (
    <Dialog open={modal.open} onOpenChange={modal.setOpen}>
      <DialogTrigger asChild>
        <Button className={buttonVariants()}>Open Modal</Button>
      </DialogTrigger>
      <DialogContent className={cn(contentVariants({ size }))}>
        <DialogHeader>
          <DialogTitle>Modal Title</DialogTitle>
          <DialogDescription>
            Modal Desc
          </DialogDescription>
        </DialogHeader>

        {children}
      </DialogContent>
    </Dialog>
  );
};

export default AddGeneralModal;

// Usage:
const SpecificForm = (props: { onSuccess: () => void | Promise<void>}) => {
  const { mutate } = api.model.post.useMutation({
    onSuccess: async () => {
      await props.onSuccess()
    },
  });

  return (
    <Form>
      <Button onClick={ () => mutate() }> Submit < /Button>
    </Form>
  )
}

const MyPage = () => {
  const modal = useModal();

  return (
    <AddGeneralModal modal={modal}>
      <SpecificForm onSuccess={() => modal.setOpen(false)} />
    </AddGeneralModal>
  )
}

const useModal = () => {
  const [open, setOpen] = useState(false);

  // any other modal-related state can go in this hook
  
  return { open, setOpen }
};

interface AddGeneralModalProps
  extends DialogProps,
    VariantProps<typeof contentVariants> {
  modal: ReturnType<typeof useModal>
}

const AddGeneralModal = ({ children, size, modal }: AddGeneralModalProps) => {
  return (
    <Dialog open={modal.open} onOpenChange={modal.setOpen}>
      <DialogTrigger asChild>
        <Button className={buttonVariants()}>Open Modal</Button>
      </DialogTrigger>
      <DialogContent className={cn(contentVariants({ size }))}>
        <DialogHeader>
          <DialogTitle>Modal Title</DialogTitle>
          <DialogDescription>
            Modal Desc
          </DialogDescription>
        </DialogHeader>

        {children}
      </DialogContent>
    </Dialog>
  );
};

export default AddGeneralModal;

// Usage:
const SpecificForm = (props: { onSuccess: () => void | Promise<void>}) => {
  const { mutate } = api.model.post.useMutation({
    onSuccess: async () => {
      await props.onSuccess()
    },
  });

  return (
    <Form>
      <Button onClick={ () => mutate() }> Submit < /Button>
    </Form>
  )
}

const MyPage = () => {
  const modal = useModal();

  return (
    <AddGeneralModal modal={modal}>
      <SpecificForm onSuccess={() => modal.setOpen(false)} />
    </AddGeneralModal>
  )
}

Brendonovich•17mo ago

If you want even more of an abstraction, check out how we do dialogs & forms in Spacedrive: https://github.com/spacedriveapp/spacedrive/blob/f1239d166ab5e96d5c2352d355bfe6d1f022eb59/interface/app/%24libraryId/settings/node/libraries/CreateDialog.tsx

cupofcrypto•17mo ago

Thanks for the quick answer, actually I thought of lifting state since in a different project (at work) I already use Zustand to handle the state of different modals, but just between you and me I don't like it much 😅 Anyway, maybe I am just confused now, but lifting this state up means that I'll have to handle the state for each modal but I believe this will be the best approach anyway. Thanks for the support @brendonovich

Keef•17mo ago

what a quality love

Brendonovich•17mo ago

gonna keep writing essays here until Spacedrive has enough engineering blog posts that I can just link as replies

Keef•17mo ago

BASICALLY I've never touched render props so its cool to see a specific use case for them

Gaming

Programming

Send setter to `props.children`