It's main selling point is security. With Deno you can provide permission to scripts using flags. Deno offers a sandbox security layer through permissions. List of the flags:

--allow-env allow environment access.

--allow-hrtime allow high resolution time measurement.

--allow-net=<allow-net> allow network access.

--allow-plugin allow loading plugins.

--allow-read=<allow-read> allow file system read access.

--allow-run allow running subprocesses.

--allow-write=<allow-write> allow file system write access.

--allow-all allow all permissions (same as -A)