Mounted Fragment
This content was cloned from a hidden element in the page and mounted into the window body by Go.
WinBox.js fully ported to Go, compiled to WebAssembly — github.com/0magnet/winbox-go
Drag titlebars, resize from all edges and corners, double-click a titlebar to maximize, minimize several windows to see the taskbar stacking. Every window on this page is managed by Go code.