t(e){n.call(this,e)}var n=e.wrappers.HTMLElement,r=e.mixin,o=e.registerWrapper,i=window.HTMLContentElement;t.prototype=Object.create(n.prototype),r(t.prototype,{constructor:t,get select(){return this.getAttribute("select")},set select(e){this.setAttribute("select",e)},setAttribute:function(e,t){n.prototype.setAttribute.call(this,e,t),"select"===String(e).toLowerCase()&&this.invalidateShadowRenderer(!0)}}),i&&o(i,t),e.wrappers.HTMLContentElement=t}(window.ShadowDOMPolyfill),function(e){"use strict";function t(e){n.call(this,e)}var...