ChatGPT regularly makes up methods or entire libraries

I think that when it is doing that, it is normally a sign that what you are asking for does not exist and you are on the wrong track.

ChatGPT cannot explain, because it doesn’t understand

I often get good explanations that seem to reflect understanding, which often would be difficult to look up otherwise. For example when I asked about the code generated, {myVariable} , and how it could be a valid function parameter in javascript, it responded that it is the equivalent of {"myVariable":myVariable}, and "When using object literal property value shorthand, if you're setting a property value to a variable of the same name, you can simply use the variable name."