// Is there a focused element that could be using the keyboard?
 let activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;
 let activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );
 let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
+let activeElementIsInsideShadowDom = document.activeElement && document.activeElement.shadowRoot !== null;

 // Whitelist certain modifiers for slide navigation shortcuts
 let keyCodeUsesModifier = [32, 37, 38, 39, 40, 63, 78, 80, 191].indexOf( event.keyCode ) !== -1;

 // Prevent all other events when a modifier is pressed
 let unusedModifier = 	!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&
						( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );

 // Disregard the event if there's a focused element or a
 // keyboard modifier key is present
-if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;
+if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || activeElementIsInsideShadowDom || unusedModifier ) return;