Returns true if the value is a built-in Int8Array instance.
util.types.isInt8Array(new ArrayBuffer()); // Returns false
util.types.isInt8Array(new Int8Array()); // Returns true
util.types.isInt8Array(new Float64Array()); // Returns false
function
util.types.isInt8Array
object: unknown
): object is Int8Array<ArrayBufferLike>;