Github url


by julianshapiro

julianshapiro /velocity

Accelerated JavaScript animation.

16.7K Stars 1.6K Forks Last release: almost 2 years ago (v1.5.2) MIT License 894 Commits 119 Releases

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Velocity beta

npm npm (tag) cdnjs version npm downloads jsdelivr downloads


npm install [email protected]


IMPORTANT: The documentation refers to V1, not V2 beta - use the wiki for latest documentation!


WhatsApp, Tumblr, Windows, Samsung, Uber, and thousands of other companies rely on Velocity. Visit to see which sites use Velocity on their homepage.

React Plugin



Velocity (CDN, choose one of them):

<script src="//[email protected]/velocity.min.js"></script><script src="//"></script>

Velocity UI pack (CDN, choose one of them):

<script src="//[email protected]/velocity.ui.min.js"></script><script src="//"></script>

Please note that JSDelivr can automatically supply the latest release, while CloudFlare needs to ask for a specific version.

Package managers:


npm install [email protected]

Automagic chaining:

If using the


chained function in libraries such as jQuery or Zepto you need to ensure that Velocity is loaded after them. If you wish to add it to anything loaded afterwards then look at the Velocity.patch() method.

Questions or Problems?

Ask on StackOverflow (make sure you add the


and the






  • 2.0: Typescript update and complete refactoring.
  • 1.5: Bugfixes, IE9 compatibility fixes.
  • 1.4: Pause / Resume (per element or global).
    Forcefed string animation (just have matching number spaces) including unit conversions and colour names (ie
    background:["rgba(red,0.1)", "blue"]
    ). High resolution timers (animations should be slightly smoother).
    Various fixes including ticker (loading Velocity in a background window) and color handling.
  • 1.3: Code cleanup - no breaking changes known.
  • 1.2: Custom tweens. Custom easings. "Finish" command.
  • 1.0: File name changed to
    . Read
  • 0.1:
    now stops animations immediately (instead of only clearing the remainder of the animation queue). No other backwards-incompatible changes were made.



  • CSS transitions are meant for simple interface flourishes.
  • jQuery's $.animate() is slow and poorly-equipped for motion design.
  • Velocity is a fast, feature-rich standalone alternative to jQuery's $.animate().


MIT License. © Julian Shapiro (


Kiss My Button sponsors Velocity's development.

BrowserStack provides browser testing services for Velocity.

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