velocity-animate

What is velocity-animate?

Velocity-animate is a powerful and versatile JavaScript library for creating high-performance animations. It allows developers to animate HTML elements with a wide range of effects, including transformations, colors, and more. The library is known for its speed and efficiency, making it suitable for complex animations and large-scale projects.

What are velocity-animate's main functionalities?

Basic Animations

This feature allows you to create basic animations such as fading an element's opacity. The code sample demonstrates how to animate an element's opacity to 0.5 over a duration of 1000 milliseconds.

document.getElementById('element').velocity({ opacity: 0.5 }, { duration: 1000 });

Transformations

This feature enables you to apply transformations to elements, such as translating and rotating. The code sample shows how to move an element 100 pixels to the right and rotate it by 45 degrees over a duration of 1000 milliseconds.

document.getElementById('element').velocity({ translateX: '100px', rotateZ: '45deg' }, { duration: 1000 });

Color Animations

This feature allows you to animate color properties of elements. The code sample demonstrates how to change the background color of an element to red over a duration of 1000 milliseconds.

document.getElementById('element').velocity({ backgroundColor: '#ff0000' }, { duration: 1000 });

Easing Functions

This feature provides various easing functions to control the acceleration of animations. The code sample shows how to animate an element's opacity to 1 using the 'easeInOutQuad' easing function over a duration of 1000 milliseconds.

document.getElementById('element').velocity({ opacity: 1 }, { duration: 1000, easing: 'easeInOutQuad' });

Sequence Animations

This feature allows you to create sequence animations by chaining multiple animations together. The code sample demonstrates how to first animate an element's opacity to 0.5 and then back to 1, each over a duration of 1000 milliseconds.

Velocity(document.getElementById('element'), { opacity: 0.5 }, { duration: 1000 }).then(function() { return Velocity(document.getElementById('element'), { opacity: 1 }, { duration: 1000 }); });

Other packages similar to velocity-animate

animejs

Anime.js is a lightweight JavaScript animation library with a simple, yet powerful API. It supports a wide range of animations, including CSS properties, SVG, DOM attributes, and JavaScript objects. Compared to velocity-animate, Anime.js offers more flexibility and a more modern API, but may not be as performant for very complex animations.

gsap

GSAP (GreenSock Animation Platform) is a robust JavaScript library for creating high-performance animations. It is widely used in the industry and offers a comprehensive set of features, including timeline management, advanced easing, and plugin support. GSAP is known for its performance and ease of use, making it a strong competitor to velocity-animate.

popmotion

Popmotion is a functional, flexible JavaScript animation library. It provides a range of tools for creating animations, including physics-based animations, keyframes, and timelines. Popmotion's API is highly modular, allowing developers to pick and choose the parts they need. While it offers similar capabilities to velocity-animate, it is designed with a more functional programming approach.

README

Velocity 1.5.2

Docs

http://VelocityJS.org

News

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

React Plugin

Announcement: https://fabric.io/blog/introducing-the-velocityreact-library
Repo: https://github.com/twitter-fabric/velocity-react
NPM: https://www.npmjs.com/package/velocity-react

Quickstart

Velocity (CDN, choose one of them):

<script src="//cdn.jsdelivr.net/npm/velocity-animate@1.5/velocity.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/velocity/1.5.2/velocity.min.js"></script>

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

<script src="//cdn.jsdelivr.net/npm/velocity-animate@1.5/velocity.ui.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/velocity/1.5.2/velocity.ui.min.js"></script>

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

Package managers:

npm: npm install velocity-animate
bower: bower install velocity

Questions or Problems?

Ask on StackOverflow (make sure you add the [velocity.js] and [javascript] tags).

Updates

• 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 velocity.js. Read VelocityJS.org/#dependencies.
• 0.1: stop now stops animations immediately (instead of only clearing the remainder of the animation queue). No other backwards-incompatible changes were made.

Learn

• Motion design: smashingmagazine.com/2014/06/18/faster-ui-animations-with-velocity-js
• Animating without jQuery: smashingmagazine.com/2014/09/04/animating-without-jquery
• Performance comparisons: davidwalsh.name/css-js-animation
• Workflow: css-tricks.com/improving-ui-animation-workflow-velocity-js

Comparisons

• 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().

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MIT License. © Julian Shapiro (http://twitter.com/shapiro).
Stripe sponsors Velocity's development.
BrowserStack provides testing services.