How can I pass argument with requestAnimationFrame?

Question

In the main program I randomly choose an object which I\'d like to animate, so I call the function with the object as the argument. The first loop is okay, x is

Answer 1

You either need to create a reference or wrap the function call in another function like so:

mainFunc: function(x) {
    anim.update(x);
    anim.redraw(x);
    window.requestAnimationFrame(function() {
        anim.mainFunc(x);
    });
}