How can I set/fake the proptype of a component

Question

I am trying to write a shorthand version of antd's Select/Option

Instead of using

<Option value='foo'>bar</Option>

I want to use

<Option value='foo' label='bar' />

I wrote following wrapper code:

import { Select } from 'antd'

const Option = (options) => {
  const label = options.label
  delete options.label

  return <Select.Option {...options}>{label}</Select.Option>
}

When I use it in following example

<Select>
  <Option value='foo' label='bar'
</Select>

I get

Warning: the children of Select should be Select.Option or Select.OptGroup , instead of Option .

How can I return my component in a way that antd thinks it is an original Select.Option ?

Answer 1

Due to how original component works, Option component is dummy component that is never rendered and used as a placeholder for Select data, wrapping it with another component doesn't do any good.

A possible solution should extend Select instead:

import {Select as OriginalSelect} from 'antd';

const Option = props => null;

const Select = ({ children, ...props }) => {
  children = React.Children(children).map(child => {
    if (child.type === Option) {
      const {label, ...props} = child.props;
      return <OriginalSelect.Option {...props}>{label}</OriginalSelect.Option>;
    } else {
      return child;
    }
  });

  return <OriginalSelect {...props}>{children}</OriginalSelect>;
};

Also, <Option value='foo' label='bar' /> cannot be considered a shortcut for <Option value='foo'>bar</Option> because it's of the same length, so if the only purpose of Option wrapper is to make the code shorter, it's redundant.