propTypes and defaultValues when spread (...) do not show-up on the PropsTable

[Kivylius]

Bug Report

Proptypes or defaultProps that are spread do not shopup on PropTable.

To Reproduce

I've created a sample app that you can test this behavour. One single button with single mdx file.

https://github.com/kivylius/docz-no-spread

Expected behavior

The props and default values to showup on docz.

Environment

• docz version: [e.g. v2.2.0, v2.3.0-alpha.13]
• OS: [OSX 10.13.4]
• Node/npm version: [Node 10]

Additional context/Screenshots

SideNote

if importing with this syntax, the code never compiles and crashes. In the mdx or even an component.

import test from '..';

Even tho this is a valid import in react.

[mickaelzhang]

It's an issue with docgen itself (the lib that we use to get the prop type).
See for more info styleguidist/react-styleguidist#792

[Kivylius]

Thanks for the reply, but your links points to reactjs/react-docgen#282 which seems to fix the issue 2 years ago. Are we not using that versions?

[mickaelzhang]

The issue is not resolved from what I know, you can check some issue on here https://github.com/reactjs/react-docgen/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+spread

[mickaelzhang]

@Kivylius I'll close this issue for now but feel free to re-open if you think I didn't answer your question well! :)

[jasongaare]

I am seeing a similar issue, where the proptypes seem to be ignore or swallowed up when using a spread. For instance, we have an IconButton which composes two other components, which have fully-fleshed out proptypes.

IconButton.propTypes = {
  ...Button.propTypes,
  ...Icon.propTypes,
};

but this results in nothing displayed by <PropTypes of={IconButton} />

having this functionality would be very helpful in reducing code duplication...