<img srcset="@images/fig.png, @images/fig2.png, @images/fig3.png">

    <!-- custom tag with custom attributes used in filter -->
    <custom-img
      data-src-one="@images/fig.png"
      data-src-two="@images/fig2.png"
      data-resolve-attr="data-src-two"
      src="@images/fig3.png"
      alt="custom image"
    />
  </body>
</html>