The Law of Least Power and Defunct StackOverflow Answers
Answer after answer on StackOverflow to questions about basic DOM APIs and common patterns would lead to the response “Well, in jQuery, you …”. And, of course, the questions end up being closed off at some point by moderators.
The thing is, a few years ago, jQuery was such a ubiquitous part of a developer’s toolkit that this seemed a perfectly reasonable approach. Who didn’t use jQuery?