Conditional visibility of button

Start by reviewing the existing BUTTON[...] syntax and button configuration, then compare them with the proposed visibleConditions and action examples. No file or test is named, and the request leaves the condition syntax open; done would require an agreed design and implementation for conditional button visibility without breaking existing button usage.

Please fill out these Check-boxes

• I checked for existing similar feature requests
• I have read the docs and checked that the feature I am requesting is not already implemented
• My feature request consists of only one feature

Is your Feature Request related to a Problem or Annoyance?

Allow to show/hide buttons dynamically based on conditions. I want to organize a simple workflow, an example for organizing a catalog of books to read.

I have shown an example of button description below.

Describe the Feature you'd like

For exmple

• visibleConditions it's array of conditions with OR or AND conditions, maybe replace visibleConditions to hade Conditons
• if evaluate: true - value is JS and should return boolean result, for example check if tag.score > 10
• if evaluate: false - use type: hasMetadata/hasntMetadata but it looks like the evaluate property is then redundant

label: Start Reading
icon: ""
style: default
class: ""
cssStyle: ""
backgroundImage: ""
tooltip: ""
id: book-start-reading
visibleConditions:
  - type: checkMetadata
    bindTarget: tags
    evaluate: true
    value: "x == '#Book/Wishlist"
actions:
  - type: updateMetadata
    bindTarget: reading_year
    evaluate: false
    value: "2025"
 - type: updateMetadata
    bindTarget: tags
    evaluate: false
    value: Book Book/Reading

label: Finish Reading
icon: ""
style: default
class: ""
cssStyle: ""
backgroundImage: ""
tooltip: ""
id: book-finish-reading
hidden: true
visibleConditions:
  - type: hasMetadata
    bindTarget: tags
    value: Book
actions:
  - type: updateMetadata
    bindTarget: tags
    evaluate: false
    value: Book
  - type: updateMetadata
    bindTarget: finish_date
    evaluate: true
    value: new Date().getFullYear() + '-' +(parseInt(new Date().getMonth())<10?'0':'') +(parseInt(new Date().getMonth())+1) + '-' +((new Date().getDate())<10?'0':'')+new Date().getDate()

Button usage
BUTTON[book-start-reading, book-finish-reading]

This is just a concept, I don't claim to have the final syntax of conditions

Alternatives

No response

Additional Context

No response