I was just browsing a popular U.S. .GOV website (on a desktop computer) and noticed their menu icon/hamburger when clicked on opened a separate page containing the site menu. I was thinking that by having the menu on its own page this would save a LOT of menu related css, html markup, possible javascript, menu links etc. - especially with mega-menus, being loaded on each page load, maybe even increase the focus topic of the page? Those maybe are the pro's, is anyone else doing this? Or can anyone suggest the con's against doing the same? Yes I know, just because a .gov site does it... and obviously each page would still have a link to "Home".
I actually do a similar method with contact, about, privacy, terms etc. where I have a link, and icon, top and bottom of each page labeled "Reference Desk" which links to a standalone page containing a list of links to those sections. Been doing it that way for years and have had no problems.
Interested in hearing others views regarding the menu idea...