How to limit the number of uploaded files with a multiple field?

Question

1C-Bitrix

Property type - file, plural.
How to limit the number of uploaded files to three?

Answer 1

Not standard. On the server side, it's easy to hang a handler on OnBeforeIBlockElementAdd and OnBeforeIBlockElementUpdate that will cut off the excess from the array.
On the client side, you can screw a similar crutch jsfiddle.net/Curt/u4NuH