A Framework7 572,986 app is ordinary HTML that follows a fixed set of class names. You write the root element, the views and the first page; one new Framework7() call then reads that markup, attaches routers to the views and wires up touch handling. Get the nesting right and navbars, swipe-back, notch padding and right-to-left mirroring work without extra code; get it wrong and nothing navigates.