handle undefined player.elements.buttons.play

src/js/listeners.js

@@ -431,9 +431,11 @@ class Listeners {
         };
 
         // Play/pause toggle
+        if (this.player.elements.buttons.play) {
             Array.from(this.player.elements.buttons.play).forEach(button => {
                 bind(button, 'click', this.player.togglePlay, 'play');
             });
+        }
 
         // Pause
         bind(this.player.elements.buttons.restart, 'click', this.player.restart, 'restart');