bun.sh/docs/guides/binary/blob-to-dataview.md

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Convert a Blob to a DataView

The Blob class provides a number of methods for consuming its contents in different formats. This snippets reads the contents to an ArrayBuffer, then creates a DataView from the buffer.

const blob = new Blob(["hello world"]);
const arr = new DataView(await blob.arrayBuffer());

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See Docs > API > Binary Data for complete documentation on manipulating binary data with Bun.