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Hi, I am new to Greensock and I really love it so far! Today I was struggling with setting a random duration on a tween or timeline object. I created a helper function that returned a random value for the duration. In the tween properties I called the function on the duration property. However, the random value only was set once and the function was never called afterwards, although the animation was infinite by setting repeat: -1. I found the property repeatRefresh, but the docs say: What am I doing wrong and how can I set dynamic values for duration or delay for each new repetition of my animation? Thanks for some hints in advance!
GSAP 3.1 has landed with some exciting new features and various bug fixes. We highly recommend updating at your earliest convenience. Here are a few highlights: Random staggers GSAP’s staggers get even more powerful. Use the new from: “random” option to randomize how the staggers get applied. See the Pen GSAP from: "random" stagger by GreenSock (@GreenSock) on CodePen. Learn more about the advanced staggering options available in GSAP 3 below. See the Pen GSAP 3.0 Stagger demo by GreenSock (@GreenSock) on CodePen. shuffle() any Array The new shuffle() utility method randomly shuffles the contents of any Array (in place). var array = [1, 2, 3, 4, 5]; gsap.utils.shuffle(array); // returns the same array, but shuffled like [2, 5, 3, 1, 4] Timelines can now repeatRefresh Now timelines support repeatRefresh which makes all child tweens invalidate() and get refreshed when the timeline repeats, meaning their start and end values get re-calculated. It’s most useful for relative, random, or function-based values. For example, if a tween has a value like x: “random(-100, 100)”, each time the timeline repeats x would go to a new random value. See the Pen GSAP repeatRefresh on Timelines by GreenSock (@GreenSock) on CodePen. repeatRefresh skips yoyo’s It seemed a little odd to refresh the values when going in reverse, so now repeatRefresh won’t get triggered for the yoyo phase of the animation. See the Pen GSAP repeatRefresh with yoyo demo by GreenSock (@GreenSock) on CodePen. Smooth handling of complex borderRadius, borderWidth, margin, and padding values GSAP 3.1 accommodates not only simple values like borderRadius: “50%” but also more complex ones like borderRadius: “20px 50% 40px 15px” or borderRadius: “50% 20%” and it animates between them smoothly. The same goes for borderWidth, margin, and padding which can have complex values (top, right, bottom, and left). It will also return complex values correctly via gsap.getProperty(). Plus GSAP works around a Firefox bug that mis-reports certain values like borderRadius. Download today! There are many ways to get GSAP 3.1 - see the Installation page for all the options (download, NPM, zip, etc.) Resources GSAP 3.1.0 full release notes on Github Full documentation Getting started with GSAP Learning resources Community forums Happy tweening!