By using the setValue list formatting value, we are able to update field values as demonstrated in the earlier Quick Approvals sample. And the in addition to the possibility demonstrated on that sample, we can also use the new functions removeFrom and appendTo in combination with setValue, so we are able to remove and add people to a multi-person field.
After seeing great samples and ideas…
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Custom Like/Dislike functionality using SharePoint list formatting – michelcarlo
How to build a custom functionality for like/dislike with unique reaction using SharePoint column formatting,
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