Supports TypeScript 2.8 out of the box. Uses V8 6.8.275.3. That is, it's very modern JavaScript.

No package.json. No npm. Not explicitly compatible with Node.

Imports reference source code URLs only.

import { test } from "https://unpkg.com/[email protected]/testing.ts"
import { log } from "./util.ts"

Remote code is fetched and cached on first execution, and never updated until the code is run with the --reload flag. (So, this will still work on an airplane. See ~/.deno/src for details on the cache.)

File system and network access can be controlled in order to run sandboxed code. Defaults to read-only file system access and no network access. Access between V8 (unprivileged) and Golang (privileged) is only done via serialized messages defined in this protobuf. This makes it easy to audit. To enable write access explicitly use --allow-write and --allow-net for network access.

Single executable:

 > ls -lh deno
 -rwxrwxr-x 1 ryan ryan 55M May 28 23:46 deno
 > ldd deno
 	linux-vdso.so.1 =>  (0x00007ffc6797a000)
 	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f104fa47000)
 	libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f104f6c5000)
 	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f104f3bc000)
 	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f104f1a6000)
 	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f104eddc000)
 	/lib64/ld-linux-x86-64.so.2 (0x00007f104fc64000)

Always dies on uncaught erro