@std/io@0.215.0

Read a range of bytes synchronously from a file or other resource that is readable and seekable. The range start and end are inclusive of the bytes within that range.

import { assertEquals } from "@std/assert/assert_equals";
import { readRangeSync } from "@std/io/read_range";

// Read the first 10 bytes of a file
const file = Deno.openSync("example.txt", { read: true });
const bytes = readRangeSync(file, { start: 0, end: 9 });
assertEquals(bytes.length, 10);