Missed 'Copy to clipboard' icon in Code Block

[syntezzz1]

Hi!

The button disappeared after upgrading from 8.5.11 to 9.0.0 (and above). I didn't find a solution in a similar topic #5419.

Before the update, I had such a mkdocs.yml file:

use_directory_urls: true
theme:
  palette: 
    # Palette toggle for light mode
    - scheme: default
      toggle:
        icon: material/brightness-7 
        name: Switch to dark mode

    # Palette toggle for dark mode
    - scheme: slate
      toggle:
        icon: material/brightness-4
        name: Switch to light mode
  
  name: material
  #custom_dir: overrides
  features:
    - navigation.top
    - navigation.instant
    - navigation.tracking
    - toc.integrate
    - search.suggest
    - search.highlight
  favicon: favicon.png
  logo: VL_Logo.png    

plugins:
    - awesome-pages:
        collapse_single_pages: false
    - search    
    - img2fig
    - mike:
        version_selector: true   # set to false to leave out the version selector
        css_dir: css             # the directory to put the version selector's CSS
        javascript_dir: js       # the directory to put the version selector's JS
        canonical_version: null  # the version for <link rel="canonical">; `null`

extra:
  version:
    provider: mike
    
markdown_extensions:
    - toc:
        permalink: "#"
        slugify: !!python/name:pymdownx.slugs.uslugify
        toc_depth: 3

extra_css:
  - extra.css

I added the following snippet:

  features:
    - content.code.copy

and I expected the button to appear, but no, it's still not there.

mkdocs version: 1.4.3

Thanks!

[squidfunk]

Please read our upgrade guide when upgrading to a new major version. You're missing the content.code.copy feature flag:

theme:
  features:
    - content.code.copy

[syntezzz1]

Yes, I read it. And I added this section, but the button still didn't come back.

Please watch the video.

https://drive.google.com/file/d/1w-dZ9XqEt5YtGQSnuvdUbvDY4guPapKv/view?usp=sharing

[squidfunk]

I recommend to check the browser console for errors. Also, when upgrading to a new major version, you should always make sure that you adjusted all custom overrides. Other than that, if it still doesn't show up, please thoroughly read our bug reporting guide and create a new issue with a minimal reproduction. We can then look into that.

[squidfunk]

In your video: you define theme.features twice. The latter overrides the former. You must merge those configurations.

[syntezzz1]

Yes, you're right, I defined features twice. However, it does not work even with one time.

Okay, I'll double-check everything again and if I can't fix it, I'll create a new issue.