[throw_m239339]

Your mobile website certainly should require as little javascript as possible. You don't know what app the user is running in the background on what phone, so your tests on high end devices do not represent the experience of your visitors. There is no need for these drawer menus (often slow) or complex interactive filters that need 50 AJAX calls. Also the cookie consent modals have become the bain of mobile web experience, especially when they pop up 5 seconds after the user started to read your page on mobile phone. Don't use a modal dialogue, just make a page with the cookie consent and then re-direct to the requested page. What works on desktop don't automatically work on mobile just because you slapped a few media queries in your page.