pdf-reader/partials/viewer.html

<nav ng-class="getNavStyle(scroll)">
  <button ng-click="goPrevious()"><span>&lt;</span></button>
  <button ng-click="goNext()"><span>&gt;</span></button>

  <button ng-click="zoomIn()"><span>+</span></button>
  <button ng-click="fit()"><span>100%</span></button>
  <button ng-click="zoomOut()"><span>-</span></button>

  <button ng-click="rotate()"><span>90</span></button>
</nav>
<div class="notification is-primary is-danger {{errorStatus}}">
  {{error}}
</div>