What, according to your experience, should a middle-level js programmer know?

Question

Python

What are the techniques, mechanisms of the language? How do employers evaluate?

Answer 1

Add an else branch to the event.to_me check and see what events your bot is ignoring.

Answer 2

* Most importantly, a good knowledge of JS features and popular libraries such as lodash, jquery, bluebird, etc
* Experience with various frameworks (React, Vue, etc). The main one I worked with could be one
* Be able to layout and be in the subject of new HTML / CSS features
* Experience with various WEB APIs (Storage, Workers, etc)
* Experience with various build systems (webpack, gulp, etc)
* Be able to write a simple server for a static / not super complex API

Answer 3

How they evaluate - the pea jester knows ...
He should know the same as the senior - the difference is that the latter trains the team or develops the technology itself, and not on technology (but this is my judgment).
If the market - I looked at a lot of vacancies. Middle is a full-fledged core, a specialist who perfectly knows his tool, freely works with the software surrounding the main stack ... He must know many subtleties. Usually this is 2-4 years of experience, during which time he knows the entire width of the language quite well. Should have a good knowledge of how the browser works when it comes to js. There are several complex projects behind him. As a rule, it should be easy to see the pros and cons of different frames (including not quite fashionable ones, such as ExtJS)