Date.now()

Date.now()

Under the covers, the Date object keeps track of time as the number of milliseconds since January 1st, 1970. (This value is also known as a timestamp.) Date.now() is a simple way to get this value without having to first create a Date object.

Here's an example program that keeps track of how long it takes for you to press the button.

start = new Date() button = stamp('button1').tap = stop function stop() {   elapsed = Date.now() - start.valueOf()   text('It took you ' + elapsed + ' milliseconds',50,850)   text('to press the button.',50,900) }