js鼠标移动速度

let lastMousePosition = { x: 0, y: 0 };
let lastTimestamp = Date.now();

document.addEventListener('mousemove', (event) => {
  const currentPosition = { x: event.clientX, y: event.clientY };
  const currentTimestamp = Date.now();
  
  const deltaX = currentPosition.x - lastMousePosition.x;
  const deltaY = currentPosition.y - lastMousePosition.y;
  const deltaTime = currentTimestamp - lastTimestamp;
  
  // 计算速度（像素/毫秒）
  const velocityX = deltaX / deltaTime;
  const velocityY = deltaY / deltaTime;
  
  console.log(`Mouse moved at (${velocityX}, ${velocityY}) pixels/ms`);
  
  // 更新上一次的位置和时间戳
  lastMousePosition = currentPosition;
  lastTimestamp = currentTimestamp;
});