```js export const calcDate = (date1, date2) => { var date3 = date2 - date1 var days = Math.floor(date3 / (24 * 3600 * 1000)) var leave1 = date3 % (24 * 3600 * 1000) // 计算天数后剩余的毫秒数 var hours = Math.floor(leave1 / (3600 * 1000)) var leave2 = leave1 % (3600 * 1000) // 计算小时数后剩余的毫秒数 var minutes = Math.floor(leave2 / (60 * 1000)) var leave3 = leave2 % (60 * 1000) // 计算分钟数后剩余的毫秒数 var seconds = Math.round(date3 / 1000) return { leave1, leave2, leave3, days: days, hours: hours, minutes: minutes, seconds: seconds } } ```