Perfect JavaScript update loop with requestAnimationFrame

loop.js

function timestamp()
{
	return window.performance && window.performance.now ? window.performance.now() : new Date().getTime();
}


this.t = 
{
	now: null,
	acc: 0,
	dt: 0.01,
	last: 0,
	step: 1/60,
	time: 0,
	ft: 0
};


Net.prototype.animate = function(net)
{
	net.t.now = timestamp();
	net.t.ft = net.t.now - net.t.last;

	if(net.t.ft > 0.25)
		net.t.ft = 0.25;

	net.t.last = net.t.now; 
	net.t.acc += net.t.ft;

	while(net.t.acc >= net.t.dt) 
	{
		net.update(net.t.dt);
		
		net.t.time += net.t.dt;
		net.t.acc -= net.t.dt;
	}

	net.render();
	requestAnimationFrame(function(t) { net.animate(net); });
}

loop2.js

Loop()
{
	var self = this;

	this.t.now = this.timestamp();
	this.t.ft = this.t.now - this.t.last;

	if(this.t.ft > 0.25)
		this.t.ft = 0.25;

	this.t.last = this.t.now; 
	this.t.acc += this.t.ft;

	while(this.t.acc >= this.t.dt) 
	{
		this.Update(this.t.dt);
		
		this.t.time += this.t.dt;
		this.t.acc -= this.t.dt;
	}

	this.Draw();
	requestAnimationFrame(function(t) { this.Loop(this); }.bind(this));
}