deno.com
function isSet
#isSet<T>(object: T | { }): object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown>

Returns true if the value is a built-in Set instance.

util.types.isSet(new Set());  // Returns true

Type Parameters #

#T

Parameters #

#object: T | { }

Return Type #

object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown>