javascript如何实现时间格式化

如何利用javascript语法实现时间格式化，下面web建站小编给大家简单介绍一下！​

获取当前时间：

let currentTime = new Date()
let endTime = `${ currentTime.getFullYear()}-${ (currentTime.getMonth() + 1) > 9 ? (currentTime.getMonth() + 1) : '0' + (currentTime.getMonth() + 1)}-${ (currentTime.getDate() + 1) > 9 ? (currentTime.getDate() + 1) : '0' + (currentTime.getDate() + 1)} 23:59:59`

获取七天前时间：

let beforeTime = new Date((new Date()).getTime() - 1000 * 60 * 60 * 24 * 7)
let startTime = `${ beforeTime.getFullYear()}-${ (beforeTime.getMonth() + 1) > 9 ? (beforeTime.getMonth() + 1) : '0' + (beforeTime.getMonth() + 1)}-${ (beforeTime.getDate() + 1) > 9 ? (beforeTime.getDate() + 1) : '0' + (beforeTime.getDate() + 1)} 00:00:00`