Awesome
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:
npm install dynamics.js
- bower:
bower install dynamics.js
Include dynamics.js
into your page:
<script src="dynamics.js"></script>
You can animate CSS properties of any DOM element.
var el = document.getElementById("logo")
dynamics.animate(el, {
translateX: 350,
scale: 2,
opacity: 0.5
}, {
type: dynamics.spring,
frequency: 200,
friction: 200,
duration: 1500
})
You also can animate SVG properties.
var path = document.querySelector("path")
dynamics.animate(path, {
d: "M0,0 L0,100 L100,50 L0,0 Z",
fill: "#FF0000",
rotateZ: 45,
// rotateCX and rotateCY are the center of the rotation
rotateCX: 100,
rotateCY: 100
}, {
friction: 800
})
And any JavaScript object.
var o = {
number: 10,
color: "#FFFFFF",
string: "10deg",
array: [ 1, 10 ]
}
dynamics.animate(o, {
number: 20,
color: "#000000",
string: "90deg",
array: [-9, 99 ]
})
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 elementsproperties
is an object of the properties/values you want to animateoptions
is an object representing the animationtype
is the animation type:dynamics.spring
,dynamics.easeInOut
,... (default:dynamics.easeInOut
)frequency
,friction
,bounciness
,... are specific to the animation type you are usingduration
is in milliseconds (default:1000
)delay
is in milliseconds (default:0
)complete
(optional) is the completion callbackchange
(optional) is called at every change. Two arguments are passed to the function.function(el, progress)
el
is the element it's animatingprogress
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 elementproperties
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 callbackdelay
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 300friction
default is 200anticipationSize
(optional)anticipationStrength
(optional)
dynamics.bounce
frequency
default is 300friction
default is 200
dynamics.forceWithGravity and dynamics.gravity
bounciness
default is 400elasticity
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:
[{"x":0,"y":0,"cp":[{"x":0.2,"y":0}]},
{"x":0.5,"y":-0.4,"cp":[{"x":0.4,"y":-0.4},{"x":0.8,"y":-0.4}]},
{"x":1,"y":1,"cp":[{"x":0.8,"y":1}]}]
Contributing
Compile: npm run build
or npm run build:watch
Run tests: npm test
Browser Support
Working on
- Safari 7+
- Firefox 35+
- Chrome 34+
- IE10+
Sylvester
Some code from Sylvester.js has been used (part of Vector and Matrix).
License
The MIT License (MIT)
Copyright (c) 2015 Michael Villar
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.