Partially checked / indeterminate checkboxes

[sphh]

Description

Whereas Markdown does not support partially checked checkboxes (or tri-state checkboxes), some applications does. One usage example would be an item in a to-do list:

• [ ] Item not started
• [.] In progress
• [x] Finished

Proposed Changes

Add a third state to checkboxes to mark it as ‘in progress’ or ‘indeterminate’. Some examples for the syntax I found are:

• [.]
• [-]
• [~]
• [o]

Clicking on the checkbox should cycle from [ ] → [.] → [x] → [ ]

Caveats

I could not find a unicode character for such a checkbox. A possible way to render it could be to just change the colour – or do not render it at all, if there is another character beside and x between the brackets (in that way, the user can decide what to put there). HTML5 has the indeterminate = true attribute.

Do you Wish to Attempt Implementing this Yourself?

No

Zettlr Version

Stable (most recent version)

Your Platform

• Windows
• macOS
• Linux

Operating System Version

Linux Mint 21.3

Additional Information

No response