ReferenceError: reference to undefined property this.dynamicElements[0]

[Brylie Christopher Oxley]

Error

ReferenceError: reference to undefined property this.dynamicElements[0]

return this.dynamicElements[0];

http://x-tag.github.io/js/x-tag-components.js
Line 1534

Environment

Firefox 41.0.2 Ubuntu

[Daniel Buchner]

Needs to be filed in the polyfill repo: https://github.com/webcomponents/webcomponentsjs