Loop forever and provide delta time

Question

I\'m writing an HTML5 Game Development Javascript framework and I want to provide the user the difference in time between the last tick and the current one.

Answer 1

Are you over thinking it?

var myInterval = window.setInterval(calculateForDeltaHere , 20);

function calculateForDeltaHere () {
    /* Calculate delta time */
    dt = Math.random();
    tick(dt);
}

function tick() {  
  update();
  draw();
}

And when you want to stop the interval

window.clearInterval(myInterval);