function Deno.writeAll DeprecatedThis will be removed in Deno 2.0. See the Deno 1.x to 2.x Migration Guide for migration instructions. writeAll(w: Writer, arr: Uint8Array): Promise<void> Write all the content of the array buffer (arr) to the writer (w). Write all the content of the array buffer (arr) to the writer (w). Parameters w: Writer arr: Uint8Array Return Type Promise<void>