Docs addon propType description broken when using CRA and emotion's jsx pragma

When using the jsx pragma for the css prop from emotion, storybook’s docs addon does not render propType descriptions.

Here is a repo that reproduces the issue: https://github.com/jscheel/storybook-cra-emotion-jsx-pragma

The repo provides a working and broken example. In the working example (NormalExample), the description column of the prop table is generated properly. In the broken example (EmotionExample), the description column is blank.

If I kill the create-react-app config (easiest way is to just npm remove react-scripts), everything works as expected in both examples.

System:

Environment Info:

  System:
    OS: macOS Sierra 10.12.5
    CPU: (8) x64 Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz
  Binaries:
    Node: 12.13.0 - /var/folders/27/fqmq58ks6kzbkmmgg7whv4280000gn/T/fnm-shell-2901125/bin/node
    Yarn: 1.13.0 - ~/.yarn/bin/yarn
    npm: 6.12.0 - /var/folders/27/fqmq58ks6kzbkmmgg7whv4280000gn/T/fnm-shell-2901125/bin/npm
  Browsers:
    Chrome: 79.0.3945.79
    Firefox: 70.0.1
    Safari: 10.1.1
  npmPackages:
    @storybook/addon-actions: ^5.2.8 => 5.2.8
    @storybook/addon-docs: ^5.2.8 => 5.2.8
    @storybook/addon-links: ^5.2.8 => 5.2.8
    @storybook/addons: ^5.2.8 => 5.2.8
    @storybook/react: ^5.2.8 => 5.2.8

Normal, Working Example:

Broken, Emotion Example:

[shilman]

Fixed in @storybook/preset-create-react-app@1.5.0!! Please upgrade and try it out! Thanks @mrmckeb for the fix 🙌

Then we can get back to the original issue about jsx pragma 😉

[shilman]

i think this is the underlying issue: https://github.com/storybookjs/presets/issues/78

will try to work through that, and then look into the emotion issue after it’s resolved. thanks for your patience!