<picture>
  <!--[if IE 9]><video style="display: none;><![endif]-->
  <source
    ng-repeat="(size, url) in ctrl.images"
    ng-attr-data-srcset="{{ url }}"
    ng-attr-media="--{{ size }}" />
  <source
    ng-attr-data-srcset="{{ ctrl.images['xl'] }}" />
  <!--[if IE 9]></video><![endif]-->
  <img
    class="lazyload"
    src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
    ng-attr-data-srcset="{{ ctrl.images['xl'] }}" />
</picture>