版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/hsl0530hsl/article/details/88355675
下面是一个计算鼠标移动速度的例子，显示每秒移动的像素数量。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS Event Flow</title>
</head>
<body>
<script>
var previousX;
var previousY;
var previousT;
window.addEventListener('mousemove', function(event) {
if (
previousX !== undefined &&
previousY !== undefined &&
previousT !== undefined
) {
var deltaX = event.screenX - previousX;
var deltaY = event.screenY - previousY;
var deltaD = Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));
var deltaT = event.timeStamp - previousT;
console.log(deltaD / deltaT * 1000);
}
previousX = event.screenX;
previousY = event.screenY;
previousT = event.timeStamp;
});
</script>
</body>
</html>