先将两个日期都转为时间戳，相减后绝对值除以（2436001000）就是天数
getDays (start, end) { // 2019-01-21，2019-01-23
let dateSpan, iDays
start = Date.parse(start)
end = Date.parse(end)
dateSpan = end - start
dateSpan = Math.abs(dateSpan)
iDays = Math.floor(dateSpan / (24 * 3600 * 1000))
return iDays;
}
获取当前日期：
var timestamp = new Date().getTime() // 当前时间戳
getDate (timestamp) {
let date = new Date(timestamp)
let year = date.getFullYear()
let month = date.getMonth() + 1
let day = date.getDate()
let week = '周' + '日一二三四五六'.charAt(date.getDay())
if (month < 10) {
month = '0' + month
}
if (day < 10) {
day = '0' + day
}
return year + '-' + month + '-' + day; // 2019-01-21
}
