Yet another new feature proposal for JavaScript that we'll live perfectly fine without (but would at the same time also be very handy).
If your API has sensitive endpoints which returns different HTTP-responses given user action A or B, then this information is enough to infer user information which can be exploited. Learning from Tinder, let's investigate why having non-deterministic HTTP-responses are important and try to make our most business-critical API-endpoints more secure.
I needed one for this site - follow along if you want one too!