12.# 计算两个日期之间天数
const diffDays = (date, otherDate) => Math.ceil(Math.abs(date - otherDate) / (1000 * 60 * 60 * 24));
diffDays(new Date("2021-11-3"), new Date("2022-2-1")) // 90

#每天一个知识点#
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