js timestamp and date conversion

Get the current date:

var date = new Date()  //  2020 17:09:29 GMT+0800 (中国标准时间)

Get the current timestamp:

var timeStamp = new Date().getTime()  //   1584954684507

Date to timestamp:

var timeStamp = new Date('2020 17:09:29 GMT+0800 (中国标准时间)').getTime()  
//  1577869769000

Timestamp to date:

var timeStamp = '1577869769000'
var date = new Date(timeStamp*1) // timeStamp是字符串，乘以1转化为数字
//  Wed Jan 01 2020 17:09:29 GMT+0800 (中国标准时间)

var date = new Date(timeStamp*1).toLocaleDateString()
// 2020/1/1

var date = new Date(timeStamp*1).toLocaleString()
//  2020/1/1 下午5:09:29

var date = new Date(timeStamp*1).toLocaleTimeString()
//  下午5:09:29