SPO Count column

[GabrieleBT]

Good morning guys, 

I kindly ask if anyone has any idea how to proceed with this challenge:

SPO List with three columns (A) Title (B) Choice or Lookup (C) Count (Number).

- Depending on the number of items selected in column (B) column (C) will display the number of items (and not the selected options).

I already managed to achieve this with Power Automate, however, I need something more immediate (real-time).  I do think that maybe JSON can handle this task but I have no idea how to proceed. Does anyone have any thoughts or has already done something similar? Thanks

[#2 · Accepted solution]

@GabrieleBT Use below JSON column formatting for you count column: 

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "txtContent": "=length([$ChoiceCol])"
}

Where ChoiceCol is the internal name of your choice column: 

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[#3]

Thanks man! Really appreciate! Clean and exactly what I needed.