Button to add/subtract value from number property

[Alc]

What I’m trying to do

I have a property set up like:

items:

• item: Gold coins
  holder: Party
  qty: 50

On my page I would like a number input, a plus button, and a minus button. Then when you click plus or minus it adds or subtracts that number from the total in the session property.

Like this

Gold - [number_input] [Add_button] [Subtract_button]

Things I have tried

I think this should be possible with meta bind but I have checked youtube, searched this forum, tried chatgpt and checked help docs but I can’t seem to work it out

[Alc]

items:
  - item: Gold coins
    holder: Party
    qty: 50

[holroy]

Here is a variant using dataviewjs to count correct and total answers, which could be adapted to your use case.

Counting correct answers to questions

I would join the two changes to the frontmatter into one call of app.fileManager.processFrontMatter(), so you don’t have two independent file write operations to the same file. And the code also demands for the properties to be present when you start the show… There is also a small feature, that if you spam click either button, it might lag a little (or demand another click (or reload) after a little delay) to get the correct number. Accounting for all of this, and joining the handling into on…