Ryan Ravioli

Yeah, I dig making safe calls when you are worried about elements not existing, and I am doing that in most places but you know... sometimes you miss something. The exception is thrown in what I think is part of the "tick" loop. This makes it uncatchable in this case because the synchronous call just queues it up and then the async tick loop comes around and its null, and that is where the error comes from. Thanks for replying though, guess the answer is just to be as safe as possible and there is no safe way to catch it at a higher level

I'm tracking down a bug somewhere in my animation creation where an element isn't setup yet. However, what is happening in my application when it encounters it is an infinite loop of Uncaught exceptions. The full message is... I went to try and simple reproduce this in the console on this very website and my first attempt, produced the exception but not the loop. So I was confused. var tl = new TimelineMax() tl.to(window.foo, .1, {opacity: 1}) However, I realized it was actually a fromTo and not a to. So I change the example above to var tl = new TimelineMax() tl.fromTo(window.foo, .1, {opacity: 1}, {opacity: 0}) And bam, easily reproducible. The above exception repeats ad infinitum. I also tried it with two other from method and same results happen. var tl = new TimelineMax() tl.from(window.foo, .1, {opacity: 1}); //-OR- var tl = new TimelineMax() tl.staggerFromTo([window.foo], .1, {opacity: 1}, {opacity: 1}); Obviously it would be swell if I handle not doing tl.from in my code if the element doesn't exist. However, this doesn't seem to protect from what if the element is removed from the DOM after being setup. This seems to be related to the requestAnimation tick loop and maybe it is always checking to see if it has made it to where its going? I'm pretty novice at GSAP and don't fully understand the internals. My question is, is there a best practice (error events, configuration options, etc...) I have been unable to find that will safe guard my application from these errors or is it completely up to me? My comment is for the design aspects, is this seem desirable based on how GSAP works? Just kind of throwing this out there to see if I get any kinds of feedback. Thanks everyone -Ryan