function types.isTypedArray
          
Usage in Deno
import { types } from "node:util";
isTypedArray(object: unknown): object is TypedArray 
      Returns true if the value is a built-in TypedArray instance.
util.types.isTypedArray(new ArrayBuffer());  // Returns false
util.types.isTypedArray(new Uint8Array());  // Returns true
util.types.isTypedArray(new Float64Array());  // Returns true
See also ArrayBuffer.isView().
object is TypedArray