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A Uint8Array is a typed array class, meaning it is a mechanism for viewing data in an underlying ArrayBuffer. The following snippet creates a [DataView] instance over the same range of data as the Uint8Array. 
const arr: Uint8Array = ...
const dv = new DataView(arr.buffer, arr.byteOffset, arr.byteLength);
See Docs > API > Binary Data for complete documentation on manipulating binary data with Bun.