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It's funny because in a different context, that's exactly a sequence of questions that I as an engineer would ask:

> Do you have experience with React?

> Okay, do you have experience writing pure, vanilla JavaScript? Absent a framework like jQuery or Backbone or Angular?

The second question can often screen out people who simply maintain framework apps rather than those who actually know JS.

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Are you assuming that people who haven't maintained a vanilla JS app don't actually know JS?

Not at all. I'm getting at the fact that many frontend devs don't know JavaScript, they just know cut-and-paste jQuery or how to fiddle with/maintain React/Angular components in a large app.

I doubt you can really just cut-n-paste jQuery in any nontrivial web app...

Correct, and that's one way to decisively filter out people who haven't worked on a nontrivial web app.

Exactly. A nuanced question like that is beneficial... but it has to be clear that there is that nuance.

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