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Tween delay ignored after tab switchHi. I'm writing a particle tweening script that tweens a bunch of dom elements, which I each give a slightly more delay. Everything looks fine, but when I switch tabs in my browser (chrome, but same in safari) and after that go back to the tab with my particle tweens, the delay seems to be ignored.. All the tweens start at the same time, without the delay! Any idea why this is? If you don't understand what I mean, I could upload the script to my hosting as an example. Oh, and I thought about using timelinelite for this, but I really want the sort of plugin I'm writing to not be dependent of timelinelite, only of tweenlite. Edit: I've uploaded the test project to my webhost so you can see the problem yourself. http://sanderbruggem...cles/index.html Open the page in a tab, then click on another tab, wait a few seconds and go back to the tab with my test project: the particles "explode" now instead of continuously loop.. I think I know why: the first time the tween is played, the delay is taken into account, but then when I call "restart()" on the tween in onComplete, the delay is not added anymore. Which in general is good: the tween already has an offset regarding the other tweens because of the initial delay. However, probably for speed reasons, when navigating away from the page, all the tweens are being reset/paused or whatever, and on focus again all the tweens are played again (but this time without the initial delay, because it practically fires "restart()" but this time on all the tweens at the same time). So my question actually is: what type of event is used to determine if the window/tab is focussed, so I can intercept this (i've had partial success with window.onfocus() and window.onblur()) OR is there maybe another solution for this?