[Tracking] React-docgen related issues

[yannbf]

NOTE: For anybody who is unaware, a workaround for many (most?) of these issues is to set typescript.reactDocgen to react-docgen-typescript in .storybook/main.js. Learn more.

Describe the bug

This will serve as an umbrella issue where we document all the issues regarding react-docgen. It will be updated over time.

React-docgen related issues

Performance related

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1. [Bug]: Storybook 8 babel code generator takes forever to start up with material ui components and runs out of memory when trying to build #26543
   bug performance issue sev:S2 +3
   

Limitations

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1. [Bug]: 8.0.0 8.1.0-alpha2 Vite React ReferenceError in component resolution #26548
   bug needs triage +2
2. [Bug]: Prop Reference Error with Object Type Syntax in Storybook v8 #26406
   bug docgen upgrade:8.0 +3
3. [Bug]: Missing initializer in const declaration in preview.ts file related to Preview type #26467
   bug needs triage +2
4. [Bug]: Storybook 8 union type arguments values are shown as "union" instead of individual values. #26407
   +0
5. [Bug]: Storybook v8.0.0-alpha.16 unknown types #25909
   bug nextjs +2
   
6. [Bug]: react-docgen fails on match(regex) inside promise. #26652
   bug docgen needs more info react +4
7. https://github.com/storybookjs/storybook/discussions/26583
8. [Bug]: Controls can't display enum props #26745
   bug needs triage +2
9. [Bug]: build error using typescript decorators when upgrade react-vite to 8.0.6 #26780
   bug docgen react +3
10. [Bug]: v7 -> v8 controls tab is missing a lot of information #26496
    Stale bug docgen needs more info react +5

Reproduction

In order to assist the React docgen maintainer to fix as many of these issues as possible, here's a reproduction that shows all these scenarios, with options to run Storybook with both react-docgen and react-docgen-typescript for comparison:

https://stackblitz.com/edit/react-docgen-issues-and-limitations

[federico-ntr]

Just wanted to report an issue I opened some weeks ago regarding react-docgen.
I have opened an issue on react-docgen repo as well.