const _ = require('lodash')
const date = new Date()
const DBtoday = `${date.getFullYear()}${_.padStart(date.getMonth() + 1, 2, '0')}${_.padStart(date.getDate(), 2, '0')}`
const Registerdt = function(days) {
const Registerdays = new Date(days * 24 * 60 * 60 * 1000)
const RegisterDate = new Date(date - Registerdays)
const StrDt = ''
const dt = StrDt.concat(`${RegisterDate.getFullYear()}`
+ `-${_.padStart(RegisterDate.getMonth() + 1, 2, '0')}`
+ `-${_.padStart(RegisterDate.getDate(), 2, '0')}`
+ ` ${_.padStart(RegisterDate.getHours(), 2, '0')}`
+ `:${_.padStart(RegisterDate.getMinutes(), 2, '0')}`
+ `:${_.padStart(RegisterDate.getSeconds(), 2, '0')}`)
return dt
}
console.log(DBtoday,date,Registerdt(0),Registerdt(30))