How does Pimcore generates all the Backend Html?

I am new to Pimcore and just curious to know how does pimcore generates all those backend HTML and CSS files??

Please Help!!

Regards,
Miniyan

Pimcore uses ExtJs as Javascript Framework. ExtJS is responsible for HTML Generation in Backend.

i am aware that pimcore uses Extjs as JS framework but can you explain how HTML is dynamically generated and how the element ids are assigned??

extjs does that internally, there is no need to explain it, it is just how extjs works