That's a good idea. It'd be as simple as adding the following before line 19: process.on('exit', () => (process.exitCode = 1)); I didn't want to assume tha

That's a good idea. It'd be as simple as adding the following before line 19: process.on('exit', () => (process.exitCode = 1)); I didn't want to assume that people are executing the code in-browser or terminal for the purpose of this Gist, but feel free to fork for your needs.