js实现鼠标滑动

鼠标滑动效果实现方法

基础鼠标跟随效果

通过监听mousemove事件获取鼠标坐标，并更新元素位置：

document.addEventListener('mousemove', (e) => {
  const follower = document.getElementById('follower');
  follower.style.left = `${e.clientX}px`;
  follower.style.top = `${e.clientY}px`;
});

平滑跟随动画

使用CSS过渡或requestAnimationFrame实现平滑移动：

let posX = 0, posY = 0;
const follower = document.getElementById('follower');

function animate() {
  const diffX = posX - follower.offsetLeft;
  const diffY = posY - follower.offsetTop;

  follower.style.left = `${follower.offsetLeft + diffX * 0.1}px`;
  follower.style.top = `${follower.offsetTop + diffY * 0.1}px`;

  requestAnimationFrame(animate);
}

document.addEventListener('mousemove', (e) => {
  posX = e.clientX;
  posY = e.clientY;
});

animate();

轨迹记录与回放

存储鼠标坐标并实现轨迹回放：

const points = [];
let isRecording = false;

document.addEventListener('mousemove', (e) => {
  if (isRecording) {
    points.push({ x: e.clientX, y: e.clientY });
  }
});

function replay() {
  let index = 0;
  const interval = setInterval(() => {
    if (index >= points.length) {
      clearInterval(interval);
      return;
    }
    follower.style.left = `${points[index].x}px`;
    follower.style.top = `${points[index].y}px`;
    index++;
  }, 16);
}

视觉特效增强

添加拖尾效果和粒子动画：

document.addEventListener('mousemove', (e) => {
  const particle = document.createElement('div');
  particle.className = 'particle';
  particle.style.left = `${e.clientX}px`;
  particle.style.top = `${e.clientY}px`;
  document.body.appendChild(particle);

  setTimeout(() => {
    particle.remove();
  }, 1000);
});

性能优化建议

避免频繁的DOM操作，使用transform属性代替top/left：

follower.style.transform = `translate(${e.clientX}px, ${e.clientY}px)`;

考虑使用事件节流减少处理频率：

let lastTime = 0;
document.addEventListener('mousemove', (e) => {
  const now = Date.now();
  if (now - lastTime > 16) {
    updatePosition(e);
    lastTime = now;
  }
});