This is why you should understand the language first. A framework is just a tool to abstract some complex/repetitive tasks and work faster, but they're in no w

This is why you should understand the language first. A framework is just a tool to abstract some complex/repetitive tasks and work faster, but they're in no way a replacement for the language they're written in. For example, jQuery.ajax(), you should not treat it as a black box, and pretend everything is done by magic. You should at least understand the process behind it: Creating the XMLHTTPRequest object, setting the onreadystate event to check if the request was successful, etc. If a feature brought by a framework is good enough, it will be added eventually to the language, ex. document.querySelectorAll().