PolymerLabs/paper-spinner — pull request #4 by keanulee (2014-10-16 21:55:23+00:00)
Title: IE compatibility! [Fixes #3]

Outstanding Issues:

* Performance?
* Uses (web-animations.js) to overcome IE limitation of no SVG animations with CSS.
* Either make Chrome/Firefox/Safari use and remove dead CSS, or only use for IE (causes redundant code)
* Either need to add the following to web-animations.js, or change to custom programatic animation effect and set attribute on SVG element directly:

```javascript
var propertyTypes = {
//…
strokeDashoffset: lengthType,
strokeWidth: lengthType
};
```

* Unlike CSS animations, the easing function spans over the entire animation, not just between keyframes.