import { Deno } from "https://deno.land/x/deno@v1.41.0/cli/tsc/dts/lib.deno.ns.d.ts";
const { fsync } = Deno;
Flushes any pending data and metadata operations of the given file stream to disk.
const file = await Deno.open(
"my_file.txt",
{ read: true, write: true, create: true },
);
await file.write(new TextEncoder().encode("Hello World"));
await file.truncate(1);
await Deno.fsync(file.rid);
console.log(await Deno.readTextFile("my_file.txt")); // H