Instead of getting lost in the jungle, 'foo', 'bar' style helps understand the concept. To the ones who say it's not an effective way; What if a learner is coming from non 'web-dev' background e.g. from a mathematical one who wishes to create complex alogorithms and geometries, interfaces etc. with JS, Won't he, on seeing 'login' code, wish that it were of his interest? After all JS is not only used to just create typical sites. What if learner was going to use JS on iot, robots etc.? So stereotyping the code with some particular 'web-dev' usecases is not useful (atleast not at the beginning). 'foo', 'bar' style helps focus on what it's really important to learn at first.
It's like -- 'a human without makeup is the most real'
It's like -- 'a human without makeup is the most real'