There could be more details there, but here's the summary of the problem: https://wiki.whatwg.org/wiki/Custom_Elements#Subclassing_existing_elements
:DG< On Wed, Mar 11, 2015 at 7:17 AM, Халитов Кирилл <voro...@gmail.com> wrote: > Hello. My issue is described there > <http://stackoverflow.com/questions/28985426/extending-htmlcanvaselement-in-custom-element-issue> > . > > But I did not solve its fully. Why can not I create a pure custom canvas > element with a full functionality like in my example code? > > -- > *С уважением* > *Кирилл Халитов* >