difference

difference(target, source)

Returns a new set containing all values from the target set that are not present in the source set.

data-first

difference(new Set([1, 2, 3]), new Set([2, 3, 4])); // Set([1])
difference(new Set([1, 2]), new Set([3, 4])); // Set([1, 2])

data-last

pipe(new Set([1, 2, 3]), difference(new Set([2, 3, 4]))); // Set([1])
pipe(new Set([1, 2]), difference(new Set([3, 4]))); // Set([1, 2])