Addon-docs: Make anchor links work without being thrown into iframe.html

[jonathanloske]

Is your feature request related to a problem? Please describe.
I created a rather long document (a changelog) and wanted to make navigation easier by providing anchor links. The anchor links work but they take me to the iframe.html version of the story I'm looking at.

Minimal example:

[Test](#a)

Describe the solution you'd like
I would like it so that clicks on an anchor link keep me on the current page and just scroll the content there.

Describe alternatives you've considered
I did not consider alternatives since the current behavior is not perfect but works.

Are you able to assist bring the feature to reality?
no

Additional context
This works as intended on the MDX playground so I guess this is an issue with Storybook.

[stale]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[shilman]

Closing this as a duplicate to #8184

[shilman]

Whoopee!! I just released https://github.com/storybookjs/storybook/releases/tag/v5.3.0-alpha.46 containing PR #8132 that references this issue. Upgrade today to try it out!

You can find this prerelease on the @next NPM tag.