Expand description
WHATWG Blob (spec subset, no deps; semantics studied from the
read-only llrt reference). new Blob(parts?, { type? }) where parts
is an iterable of string / Blob / Uint8Array / ArrayBuffer;
size, type, text(), arrayBuffer(), bytes(), slice(),
stream() (a ReadableStream). Body readers are returned
synchronously (await-transparent), consistent with the rest of the
fetch subset.