* { margin:0; padding:0; border:none } body,html { height:100%; width:100%; } .drag-box { user-select:none; background:#f0f0f0; z-index:2147483647; position:fixed; left:0; top:0; width:200px; } #dragBoxBar { align-items:center; display:flex; justify-content:space-between; background:#ccc; width:100%; height:40px; cursor:move; user-select:none; } .no-select { user-select:none; } .pointer-events { pointer-events:none; } .no-border { border:none; } #injectedBox { height:160px; display:flex; align-items:center; justify-content:center; font-size:2rem; background:#eee; }