He configurado Silentbox en mi proyecto a partir de la documentación oficial. y estoy recibiendo algunos errores .. 
aquí está la función:
Vue.prototype.$silentbox = { /** * Programatically open SilentBox overlay. * * @param {Object} image */ open: image => { const OverlayClass = Vue.extend(__vue_component__); const instance = new OverlayClass().$mount(); instance.$set(instance, 'visible', true); instance.$set(instance, 'overlayItem', image); // Get the website body, so we can append false silentbox root to it later const bodyRoot = document.getElementsByTagName('body')[0]; // Create false silentbox root const silentboxRoot = document.createElement('div'); // Set ID to false silentbox root, so we can target it in some cases silentboxRoot.setAttribute('id', 'silentbox--false-root'); // Register the elements silentboxRoot.appendChild(instance.$el); bodyRoot.appendChild(silentboxRoot); instance.$on('closeSilentboxOverlay', () => { // Remove and destroy the instance after closing. silentboxRoot.remove(); instance.$destroy(); }); } };