new date javascript to timestamp code example

Example 1: javascript get timestamp

var currentTimeInSeconds=Math.floor(Date.now()/1000); //unix timestamp in seconds
var currentTimeInMilliseconds=Date.now(); // unix timestamp in milliseconds

Example 2: convert timestamp to date js

var date = new Date("2016-07-27T07:45:00Z");
However, you can run into trouble when you do not provide the timezone explicitly!