var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
setTimeout(() => {
let msg = this.msg;
this.msg = scrollTop;
if (this.msg > msg) {
console.log(" 向下");
}else {
console.log(" 向上");
}
}, 10);
js判断滚动是向上还是向下
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转载自blog.csdn.net/qq719756146/article/details/86606034
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