JavaScript 计算两个日期之间的间隔（日）

const dayDif = (date1, date2) => Math.ceil(Math.abs(date1.getTime() - date2.getTime()) / 86400000);

let result = dayDif(new Date("2022-8-10 00:00:00"), new Date("2022-8-1 00:00:00"));

console.log(result);