ut no intrinsic size
 inline_width is constrained by left/right, height computed proportionally -->
<div class="container">
  <img class="target" style="left:100px;right:100px;" 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="188" data-expected-height="47" data-offset-y="146" data-offset-x="109"
  >
</div>
<!-- Same as previous test, but with max-width:fit-content. cr