Storybook: Vue version in template

[rijkvanzanten]

Describe the bug
While writing a story, I noticed that Storybook's template string doesn't play nicely with Vue's scoped slot syntax. This indicates to me that the Vue version that's used to render the template string is < 2.6.

To Reproduce
Steps to reproduce the behavior:

1. Create a .stories.js file that renders a Vue component as follows:

export default {
  title: 'MyButton'
};

export withText = () => ({
  template: '<v-button><v-icon #icon /></v-button>'
});

1. Note how
   '<v-button><v-icon #icon /></v-button>' does not work as expected, while
   '<v-button><v-icon slot="icon" /></v-button>' does.

Expected behavior
I expected Storybook to render this template with the Vue version that's installed in node_modules. Which in my case is 2.6.11 (according to yarn list).

Screenshots
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Code snippets
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System:

Environment Info:

  System:
    OS: macOS 10.15.2
    CPU: (12) x64 Intel(R) Core(TM) i7-8700B CPU @ 3.20GHz
  Binaries:
    Node: 12.13.0 - ~/n/bin/node
    Yarn: 1.21.1 - ~/n/bin/yarn
    npm: 6.13.6 - ~/n/bin/npm
  Browsers:
    Chrome: 79.0.3945.117
    Firefox: 70.0.1
    Safari: 13.0.4
  npmPackages:
    @storybook/addon-actions: ^5.3.3 => 5.3.6 
    @storybook/addon-centered: ^5.3.6 => 5.3.6 
    @storybook/addon-knobs: ^5.3.6 => 5.3.6 
    @storybook/addon-links: ^5.3.3 => 5.3.6 
    @storybook/addon-notes: ^5.3.6 => 5.3.6 
    @storybook/addons: ^5.3.3 => 5.3.6 
    @storybook/vue: ^5.3.3 => 5.3.6 

Additional context
What is this template string rendered with? How can I upgrade the Vue version in use here? The slot="" syntax will be deprecated in Vue 3, so I'd like to keep my stories / components as "future proof" as possible.

[shilman]

@pksunkara @Aaron-Pool @pocka any thoughts?

[pksunkara]

Additional context, Latest @storybook/vue devDependencies has

  'babel-preset-vue': '^2.0.2',
  vue: '^2.6.8',
  'vue-loader': '^15.7.0',
  'vue-template-compiler': '^2.6.8'

[Aaron-Pool]

@rijkvanzanten Any public code that I can easily pull down and debug?

[stale[bot]]

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!

[stale[bot]]

Hey there, it's me again! I am going close this issue to help our maintainers focus on the current development roadmap instead. If the issue mentioned is still a concern, please open a new ticket and mention this old one. Cheers and thanks for using Storybook!