JavaScript creating a Date x object?

Question

Let's say I have a number x that can be anything (within reason). How can I create a new Date object that equals x number of seconds ago? I do not know how to approach this.

Answer 1

var seconds = 5; var dateNow = new Date(); var date5SecondsAgo = new Date(dateNow.getTime() - seconds*1000); 

Answer 2

 var now = new Date(); var seconds = 15; var before = new Date(now.getTime() - seconds*1000); 

Answer 3

You can use the valueOf / getTime property to get the number of milliseconds since January 1, 1970, and then after milliseconds per second

 var milliSecondPerSecond = 1000; var myStartDate = new Date(myEndDateTime - numberOfSeconds * milliSecondPerSecond );