> automatically subtract the scrollbar width Santa: "That is simply impossible with the default scrollbar model". You may have infinite loop in layout algorit

> automatically subtract the scrollbar width Santa: "That is simply impossible with the default scrollbar model". You may have infinite loop in layout algorithm in cases when content is close to size of the viewport. 0) remove scrollbars 1) calculate VW; 2) do content layout; 3) if content exceeds viewport height, add v-scrollbar and goto 1 if it has not the scrollbar before; 4) if content does not exceed viewport height, remove v-scrollbar and goto 1 if it has it before; The only option is to use scrollbars that do not take space: normally scrollbar appears as thin semitransparent bar on top of content. And on mouse hover the real scrollbar appears , but again on top of content. Such scrollbars do not cause re-layout as you see and VW is a viewport width always. That's why in Sciter(https://sciter.com https://sciter.com) I've added overflow:scroll-indicator; That's exactly that non-taking-space-scrollbar.