method Deno.FsFile.prototype.syncData
FsFile.prototype.syncData(): Promise<void>
Flushes any pending data operations of the given file stream to disk.
```ts
using file = await Deno.open(
"my_file.txt",
{ read: true, write: true, create: true },
);
await file.write(new TextEncoder().encode("Hello World"));
await file.syncData();
console.log(await Deno.readTextFile("my_file.txt")); // Hello World
```
Promise<void>