Deno aims to be a productive and secure scripting environment for the modern programmer.
It will always be distributed as a single executable – and that executable will be sufficient software to run any deno program. Given a URL to a deno program, you should be able to execute it with nothing more than the 50 megabyte deno executable.
Deno explicitly takes on the role of both runtime and package manager. It uses a standard browser-compatible protocol for loading modules: URLs.
Deno provides security guarantees about how programs can access your system with the default being the most restrictive secure sandbox.
Deno provides a set of reviewed (audited) standard modules that are guaranteed to work with Deno.