> The overwhelming majority of JS developers learn the basics before moving on to a modern framework. I'm not sure if this is the case. I actually set this as

> The overwhelming majority of JS developers learn the basics before moving on to a modern framework. I'm not sure if this is the case. I actually set this as an interview question for mid-weight to senior on paper front end engineers and a solid 60% couldn't do it - this was four years ago. Not being able to do this wasn't a "fail" by the way, it was more something to talk around, especially when people successfully reasoned it out without knowing the underlying API, but it did reveal a relatively shallow understanding of the browser environment. I imagine it is significantly worse now. Do the training course at boot camps take people up from `querySelectorAll` before jumping into React? I'm not sure they do.