Distinctive properties of Web Application Frameworks and Web UI Frameworks?

I am totally new to web applications, and would need a clear and distinctive properties list (differences) where a web application framework stops and an web ui framework starts, to get a deeper/broader understanding of web applications.

As per now I realized, that a web application framework starts at a ajax call, that is wrapped around some rich application, which is written in javascript (client-side technology), but I could not find a distinctive border to web ui frameworks.

Usually in general purpose languages (e.g. C#, Java) for desktop applications, you can clearly state which part of code is handled by a library, or the framework, or your own implementation. How is this with web frameworks (application frameworks and ui frameworks)?

If possible, I have some frameworks, that can be used in the examples: Ext.JS, Angular 4, KendoUI, jQuery, Dojo.

I am also asking this question, because as far as I know, even Wikipedia editors have not been able to precisely categorize the sheer amount of web frameworks. How could those be categorized, based on which distinctive properties?