addon-docs, unconsistent "showCode" behaviour (6.0.0-rc.14)

Describe the bug Given 2 story functions implementing the same component, the rendered source code is not the same depending on the story function parameters (6.0.0-rc.14, typescript and react)

To Reproduce This is reproductible in an easy manner. In a *.stories.tsx, add these 2 functions :

export const SampleWithoutParams = () => {
  return (<div>a</div>);
};

export const SampleWithParams = (args: Args, ctx: StoryContext) => {
  return (<div>a</div>);
};

Then in the docs tab, click on “showCode” :

Expected behavior IMHO, the source code should be the same. I mean the first one eg :

() => {
  return (<div>a</div>);
}

Seems that when there are params, source code is “interpreted”.

System:

Environment Info:

  System:
    OS: Linux 5.4 Ubuntu 20.04 LTS (Focal Fossa)
    CPU: (4) x64 Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz
  Binaries:
    Node: 13.3.0 - ~/.nvm/versions/node/v13.3.0/bin/node
    npm: 6.13.1 - ~/.nvm/versions/node/v13.3.0/bin/npm
  Browsers:
    Chrome: 84.0.4147.89
    Firefox: 78.0.2
  npmPackages:
    @storybook/addon-actions: ^6.0.0-rc.14 => 6.0.0-rc.14 
    @storybook/addon-docs: ^6.0.0-rc.14 => 6.0.0-rc.14 
    @storybook/addon-jest: ^6.0.0-rc.14 => 6.0.0-rc.14 
    @storybook/addon-links: ^6.0.0-rc.14 => 6.0.0-rc.14 
    @storybook/addon-storysource: ^6.0.0-rc.14 => 6.0.0-rc.14 
    @storybook/addons: ^6.0.0-rc.14 => 6.0.0-rc.14 
    @storybook/preset-create-react-app: ^3.1.4 => 3.1.4 
    @storybook/react: ^6.0.0-rc.14 => 6.0.0-rc.14

Additional context Sorry if this is not a bug, I tried to search but did not found an issue about that.

[shilman]

This is still WIP and I’ll document it properly including the rationale once things are finalized. In a nutshell, there is a new parameter docs.source.type which can take on the values 'auto' | 'code' | 'dynamic'. Default is ‘auto’ which chooses ‘dynamic’ for args stories and ‘code’ for classic stories. You can force this to be ‘code’ globally to get the behavior you want. Away from keyboard for a few days but will be smoothing everything out here next week.

[redders6600]

Ah - I think all of my stories must have params, as mine always look like your second option, hence opening this issue: #11645…

Definitely would prefer if the actual source was used instead of just displaying the resulting DOM.