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function isMap
#isMap<T>(object: T | { }): object is T extends ReadonlyMap<any, any> ? (unknown extends T ? never : ReadonlyMap<any, any>) : Map<unknown, unknown>

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

util.types.isMap(new Map());  // Returns true

Type Parameters #

#T

Parameters #

#object: T | { }

Return Type #

object is T extends ReadonlyMap<any, any> ? (unknown extends T ? never : ReadonlyMap<any, any>) : Map<unknown, unknown>