How do you calculate total time in javascript?

Answer 1

The easiest way is to use JavaScript's native Date object. That object has a method called 'getTime()' that returns the number of milliseconds since the Unix epoch (Midnight, 1 January 1970, UTC)

To determine how long between two separate events, you'd simply set a pair of variables at the start and the end, and then do the math. This will return the number of milliseconds between the setting of the two variables.

var dateA = new Date().parse('March 21, 2012');

/*thing you want timed goes in here*/

var dateB = new Date().parse('July 15, 2012');

var difference = dateA - dateB;

//difference will now contain 10022400000

You will certainly want to turn that into a more readable format. See the related JSFiddle for complete code on how to work with this object.