[SOLVED]How to perform a function on just one repeater item?

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The logic of the function >>>>>>>>

If the quantity value of the item clicked (buttonSume) is greater than 0
box with (buttonMinus) show() with quantity value (1).

If clicked again, it adds +1 to the amount of the item clicked.

If the quantity value of the item clicked (buttonSume) is less than 1
box with (buttonMinus) hide().