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<!DOCTYPE html> <html> <body onwheel="myFunction(event)"> <h1>WheelEvent deltaZ 属性</h1> <p>滚动此页面以查看 deltaZ 属性的值。</p> <p><strong>注意：</strong>大多数鼠标设备没有沿 z 轴滚动的能力，并且总是返回 0。</p> <p id="demo"></p> <script> function myFunction(event) { var z = event.deltaZ; document.getElementById("demo").innerHTML = z; } </script> </body> </html>