Check if date is less than 1 hour ago?

Question

Is there a way to check if a date is less than 1 hour ago like this?

// old date var olddate = new Date("February 9, 2012, 12:15");  // current date var currentdate = new Date();  if (olddate >= currentdate - 1 hour) {     alert("newer than 1 hour"); else {     alert("older than 1 hour"); } 

Also, different question - is there a way to add hours to a date like this?

var olddate = new Date("February 9, 2012, 12:15") + 15 HOURS; // output: February 10, 2012, 3:15 

Answer 1

Define

var ONE_HOUR = 60 * 60 * 1000; /* ms */ 

then you can do

((new Date) - myDate) < ONE_HOUR 

To get one hour from a date, try

new Date(myDate.getTime() + ONE_HOUR)