Recently someone did a PR where he put something on the global object. Something like

global.foo = 'bar';

This doesn't feel like a good thing to do. You might accidentally override something. Also it makes it very hard to track where the global variable was set. I don't believe I actually ever used the global keyword in my code.

It's the same thing for window in browser environments.

Just wanted to bring up the discussion as I might be wrong though. If not, should we forbid the use of global entirely? Or only setting values?