Cross-post from my blog http://code4word.com/
As a fallback mechanism, X-Tag also uses a set of polyfills shared with Google’s Polymer framework, in case there was no native support for the Custom Element.
The X-Tag has a wide Browser Support:
|Edge (all versions and devices) and Internet Explorer 9+|
|Firefox (all versions, devices, and platforms)|
|Chrome (all versions, devices, and platforms) and Android 4+ stock browser|
|Safari and Safari iOS 5+|
|Opera 11+ (all devices and platforms)|
Just in case you missed out on Web Components and might be wondering what on earth is this?