A polyfill to add support for the ARIAMixin interface mixin, for browsers that do not implement it (e.g. Firefox). Note that IE also does not support ARIAMixin, but this polyfill does not work for that platform, as it relies on getters and setters.
Adds an attribute with the given name.
||string||The name of the attribute, in camelCase.|
Install the polyfill if needed.