Does excludeDecorators work in Source doc blocks?

[oldfieldtc]

Summary

We're looking to output component code both with and without decorators in an MDX file but it doesn't look like excludeDecorators works in the Source doc block. Is that the case? It's part of the Source documentation so I assumed it worked in the doc block as well as per story.

<Source of={ButtonStories.Primary} excludeDecorators={true} />

Happy to put in a feature request or a bug report if this hasn't been added or isn't working.

Additional information

• Storybook version 10.4.6 but is also happening in v11.0.0-alpha.1 in the reproduction
• Using @storybook/html-vite

Create a reproduction

https://stackblitz.com/edit/github-kqxin33k?file=src%2Fstories%2FButton.stories.js&file=src%2Fstories%2FButton.mdx&preset=node

[dfbustosus]

excludeDecorators currently does not work as a per-<Source> prop, so your reproduction matches the implementation rather than an MDX mistake.

SourceProps does not declare, consume, or forward excludeDecorators. For the HTML renderer, source generation only checks:

context.parameters.docs.source.excludeDecorators

The working configuration is therefore a story parameter:

export const PrimaryWithoutDecorators = {
  ...Primary,
  parameters: {
    docs: {
      source: {
        excludeDecorators: true,
      },
    },
  },
};

Then reference both variants:

<Source of={ButtonStories.Primary} />
<Source of={ButtonStories.PrimaryWithoutDecorators} />

Because the value comes from the story context, it cannot currently vary between two Source blocks that reference the same story. For that case, use a second story export as above, or provide explicit code/transform for one block.

The HTML renderer reads the parameter here. The documentation describing excludeDecorators as a direct Source prop is therefore inconsistent with the current implementation, so a bug/docs report would be appropriate.

[oldfieldtc]

Thanks @dfbustosus, I've submitted a bug report and we'll go down the double story route for the time being