The `blob.bytes()` method returns the byte of the `Blob` object as a `Promise<Uint8Array>`.

* `start` {number} The starting index.

* `end` {number} The ending index.

* `type` {string} The content-type for the new `Blob`

Creates and returns a new `Blob` containing a subset of this `Blob` objects

data. The original `Blob` is not altered.

* `data` {any} The Base64-encoded input string.

Decodes a string of Base64-encoded data into bytes, and encodes those bytes

into a string using Latin-1 (ISO-8859-1).

* `data` {any} An ASCII (Latin1) string.

Decodes a string into bytes using Latin-1 (ISO-8859), and encodes those bytes

into a string using Base64.