I have noticed all my iOS devices and my those of my friends have JavaScript disabled in Safari settings by default (Settings > Safari > Advanced). Yet, JavaScript seemed to be working on all websites.
When I turned it on, websites continued working as expected. But when I turned it back off most websites didn't work correctly because, you know, JavaScript is essential to them. My question is, why was it turned off by default and still working? I have iOS 11 and there's a similar question with iOS 10 here: iOS 10 Safari JavaScript setting disabled. Is this a bug or is there a reason for this?