The ball in this demo pulsates repeatedly, but the animation loop is gracefully interrupted when the user clicks anywhere else within the demo. A while (true) loop is a simple way to achieve this. Typically you'd want to avoid intentionally infinite loops, but it's common to need animations to loop indefinitely. This next example demonstrates how awaited tweens interoperate well with standard TypeScript try/ catch blocks, as well as infinite while loops. See the Pen Primise-chained tweens by Jeremy Kahn ( on CodePen. Shifty Sequencing Demo by Jeremy Kahn ( CodePen. Shifty's tiny footprint compares very favorably against other popular animation libraries: Sequencing Expand to see how Shifty compares to GreenSock's performance This works well with its MIT license, as you can redistribute it worry-free without bloating your app or concerning yourself with royalties or licensing restrictions. It is intentionally minimalistic so that you can easily embed it into your projects. Shifty is meant to be a lightweight alternative to rich tools like the excellent GreenSock Animation Platform. If you've gotten value out of Shifty, please consider supporting the developer with a small donation! Comparison with other animation libraries Shifty is a labor of love that will always be free and open source. If you find a bug or have a question about Shifty, please submit it via the GitHub issue tracker. Please use, fork, and contribute to Shifty! It is distributed under the MIT License, and experimentation is encouraged. It is also the tweening engine used by GDevelop and ProgessBar.js. Shifty powers Stylie and Mantra, a suite of graphical animation tools. Shifty async/await demo by Jeremy Kahn ( CodePen. If you need documentation for a previous version of Shifty, please see: This is the documentation for the latest version of Shifty. ( Learn about the benefits of async/ await-based animations here). Promise support: Shifty's tweens are await-able thenables.Renderer-agnostic: Shifty does not perform any rendering, but it can be easily integrated into whatever rendering mechanism is most appropriate for your project such as DOM or.Flexibility and extensibility: Shifty can easily be built upon and extended via its unopinionated API.Speed: Shifty is engineered for maximum animation performance and minimal memory usage.It is a low-level animation library focused on optimal performance and flexibility that can easily be built upon and extended. Shifty is a highly-optimized TypeScript tweening engine designed to fit all of your animation needs. The fastest TypeScript animation engine on the web
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