Dynamics.js

Dynamics.js is a JavaScript library to create physics-based animations

To see some demos, check out dynamicsjs.com.

Usage

Download:

• GitHub releases
• npm:

• bower:

Include dynamic.js into your page:

You can animate CSS properties of any DOM element.

You also can animate SVG properties.

And any JavaScript object.

Reference

dynamics.animate(el, properties, options)

Animates an element to the properties with the animation options.

• el is a DOM element, a JavaScript object or an Array of elements
• properties is an object of the properties/values you want to animate
• options is an object representing the animation
  • type is the animation type: dynamics.spring, dynamic.easeInOut … (default: dynamics.easeInOut)
  • frequency, friction, bounciness,… are specific to the animation type you are using
  • duration is in milliseconds (default: 1000)
  • delay is in milliseconds (default: 0 )
  • complete (optional) is the completion callback
  • change (optional) is called at every change. Two arguments are passed to the function. function(el, progress) 
    • el is the element it’s animating
    • progress is the progress of the animation between 0 and 1

dynamics.stop(el)

Stops the animation applied on the element

dynamics.css(el, properties)

This is applying the CSS properties to your element with the correct browser prefixes.

• el is a DOM element
• properties is an object of the CSS properties

dynamics.setTimeout(fn, delay)

Dynamics.js has its own setTimeout . The reason is that requestAnimationFrame and setTimeout have different behaviors. In most browsers, requestAnimationFrame will not run in a background tab while setTimeout will. This can cause a lot of problems while using setTimeout along your animations. I suggest you use Dynamics’s setTimeout and clearTimeout to handle these scenarios.

• fn is the callback
• delay is in milliseconds

Returns a unique id

dynamics.clearTimeout(id)

Clears a timeout that was defined earlier

• id is the timeout id

dynamics.toggleSlow()

Toggle a debug mode to slow down every animations and timeouts. This is useful for development mode to tweak your animation. This can be activated using Shift+Control+D in the browser.

Dynamics and properties

dynamics.spring

• frequency default is 300
• friction default is 200
• anticipationSize (optional)
• anticipationStrength (optional)

dynamics.bounce

• frequency default is 300
• friction default is 200

dynamics.forceWithGravity and dynamics.gravity

• bounciness default is 400
• elasticity default is 200

dynamics.easeInOut, dynamics.easeIn and dynamics.easeOut

• friction default is 500

dynamics.linear

No properties

dynamics.bezier

• points array of points and control points

The easiest way to output this kind of array is to use the curve creator. Here is an example:

Contributing

Compile:

 or

Run tests: 

Browser Support

Working on

• Safari 7+
• Firefox 35+
• Chrome 34+
• IE10+

http://dynamicsjs.com/