按下任意鍵，查看其 JavaScript key、code、keyCode、位置與目前的修飾鍵。
鍵盤測試器
Check every key on your keyboard with a live on-screen layout that lights up held keys, remembers tested ones and measures key rollover.
螢幕測試
Hunt for dead or stuck pixels with fullscreen solid colours, a gradient and a checkerboard, and see your screen's resolution, pixel ratio and refresh rate.