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 (1.0.0)

Docs
VelocityJS.org

Quickstart

bower install velocity
npm install velocity-animate

<script src="//cdn.jsdelivr.net/velocity/1.0.0/velocity.min.js"></script>

###Updates

• 1.0.0: Important! File name change. See VelocityJS.org/#dependencies for more information.
• 0.1.0: stop now stops animations immediately (instead of just clearing the remainder of the animation queue). No other backwards-incompatible changes were made.

###Learn

• Motion design: http://smashingmagazine.com/2014/06/18/faster-ui-animations-with-velocity-js
• Performance comparisons: http://davidwalsh.name/css-js-animation
• Workflow: http://css-tricks.com/improving-ui-animation-workflow-velocity-js

###Comparisons

• Famo.us is a full-fledged mobile app framework built around a physics engine.
• CSS transitions are meant for simple interface flourishes triggered by hover states.
• jQuery's $.animate() is slow and poorly-equipped for motion design.
• Velocity allows you to inject rich motion design into your UI.

###Credits

• Stripe sponsors Velocity's development.
• BrowserStack provides Velocity's testing services.

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MIT License. © Julian Shapiro (http://twitter.com/shapiro).