CSS自定义鼠标样式。JS获取鼠标坐标，实现提示气泡框跟随鼠标移动

cursor: url(//img.58cdn.com.cn/resource/xxzl/captcha/pencil.png), default;

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/*获取鼠标位置，让提示气泡框跟随鼠标*/
var sgTip=document.querySelector("#sgTip")
document.addEventListener("mousemove", e => {
    console.log(e.clientX, e.clientY);
    sgTip.style.left = e.clientX + 20 + "px", sgTip.style.top = e.clientY + 20 + "px";
});