82" data-offset-y="11" data-offset-x="59"
  >
</div>
<!-- Just viewbox. Has aspect_ratio, but no intrinsic size
 inline_width defaults to container width -->
<div class="container">
  <img class="target" src="data:image/svg+xml,%3Csvg viewBox='0 0 100 10' xmlns='http://www.w3.org/2000/svg' %3E%3Crect width='100%' height='100%' style='fill:rgb(0,255,0);'/%3E%3C/svg%3E"
  data-expected-width="388" data-expected-height="67" data-offset-y="126" data-offset-x="9"
  >
</div>
<!-- Just viewbox. Has aspect_ratio, b