const viewer = new Viewer(document.getElementById('myarticle'), {
  inline: false,
  navbar: true,
  title: false,
  toolbar: {
    zoomIn: 4,
    zoomOut: 4,
    oneToOne: 4,
    reset: 4,
    prev: 1,
    play: {
      show: 0,
      size: 'large',
    },
    next: 1,
    rotateLeft: 0,
    rotateRight: 0,
    flipHorizontal: 0,
    flipVertical: 0,
  },
});