Click the green "Download GSAP" button at http://greensock.com for more options. Most ad networks have it on their CDNs as well, so contact them for the appropriate URL(s).
npm install gsap
The default (main) file is TweenMax which also includes TweenLite, TimelineLite, TimelineMax, CSSPlugin, RoundPropsPlugin, BezierPlugin, AttrPlugin, DirectionalRotationPlugin, and all of the eases like Power1, Power2, Power3, Power4, Back, Bounce, Circ, Cubic, Elastic, Expo, Linear, Sine, RoughEase, SlowMo, and SteppedEase (except the CustomEase, CustomWiggle, and CustomBounce). Please make sure you're using at least version 1.19.1.
//typical import;//or get to the parts that aren't included inside TweenMax (works as of 1.19.1):;;
Sign up for a free GreenSock account to gain access to CustomEase, a tool that lets you create literally any ease imaginable (unlimited control points). It's in the download zip at GreenSock.com (when you're logged in).
Head over to the GreenSock forums which are an excellent resource for learning and getting questions answered. Report any bugs there too please (it's also okay to file an issue on Github if you prefer).
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License: GreenSock's standard "no charge" license can be viewed at http://greensock.com/standard-license. Club GreenSock members are granted additional rights. See http://greensock.com/licensing/ for details. Why doesn't GreenSock use an MIT (or similar) open source license, and why is that a good thing? This article explains it all: http://greensock.com/why-license/