[Bug]: summary: undefined type issue

[Hyzual]

Describe the bug

Hello,
We are using storybook with Typescript. When trying to upgrade to v8.0.10, we encountered a type issue when we want to suppress the automatic summary generated for Controls. Previously, we would make it null like so:

argTypes: {
  myArg: {
    table: {
      type: { summary: null },
    },
  },
},

With the change introduced at commit 3f7e1c2b84324ca24bc5bc968a6ab3245b11b757, null is no longer allowed. So we tried to use undefined instead. But since we use the stricter exactOptionalPropertyTypes: true configuration in our tsconfig.json, TypeScript raises the following error:

Type '{ summary: undefined; }' is not assignable to type '{ summary?: string; detail?: string; }' with 'exactOptionalPropertyTypes: true'. Consider adding 'undefined' to the types of the target's properties.
  Types of property 'summary' are incompatible.
    Type 'undefined' is not assignable to type 'string'.(2375)

Could you please change the type of summary to summary?: string | undefined so that we can keep our strict settings as well as disable the summary in controls ?

To Reproduce

Here is a link to reproduce: https://stackblitz.com/edit/github-wuwtca-dcgxst?file=src%2Fstories%2FButton.stories.ts

TypeScript raises an error in src/stories/Button.stories.ts, in argTypes property of meta.

System

Storybook Environment Info:

  System:
    OS: Linux 6.8 Fedora Linux 40 (Workstation Edition)
    CPU: (12) x64 12th Gen Intel(R) Core(TM) i7-1255U
    Shell: 5.2.26 - /bin/bash
  Binaries:
    Node: 20.11.1 - /nix/store/lajyj1j3bkzcpiqra4phhs810zxglcp6-build-tools-js/bin/node
    pnpm: 8.7.0 - /nix/store/lajyj1j3bkzcpiqra4phhs810zxglcp6-build-tools-js/bin/pnpm <----- active
  npmPackages:
    eslint-plugin-storybook: ^0.8.0 => 0.8.0

Additional context

No response

[shilman]

@Hyzual Any chance you can open a PR with the fix?

[Hyzual]

OK, I'll open one next week👌

[angad-sethi]

G'day folks, I've jumped the gun and created a PR for this here.
@Hyzual, please lmk if this fixes your issue!