function Deno.readAll DeprecatedThis will be removed in Deno 2.0. See the Deno 1.x to 2.x Migration Guide for migration instructions. readAll(r: Reader): Promise<Uint8Array> Read Reader r until EOF (null) and resolve to the content as Uint8Array`. Read Reader r until EOF (null) and resolve to the content as Uint8Array`. Parameters r: Reader Return Type Promise<Uint8Array>