前端js读取excel、xlsx⽂件⽇期被转为数字，⽇期格式转换记录⼀下，⽇常debug ⽹上最普遍的⽅法 `function formatDate(numb, format) { const time = new Date((numb - 1) * 24 * 3600000 + 1);time.setYear(time.getFullYear() - 70)const year = time.getFullYear() ;const month = ...