Using WebP as a background image in SVG

Question

So I would like to do the same, or similar, to what I would do in HTML:

   <picture>
      <source type="image/webp" srcset="my-image.webp">
      <img src="my-image.jpg">
   </picture>

But, obviously this won't work:

   <svg>
      <picture>
         <source type="image/webp" srcset="my-image.webp">
         <img src="my-image.jpg">
      </picture>
   </svg>

I could use .htaccess approach, but I would prefer not to because of the 302 HTTP redirect.

The solution also needs to work without any JavaScript trickery...

Answer 1

This is what I ended up doing, thanks to the input from Robert Longson:

<foreignObject x="0" y="0" width="100%" height="100%">
                <picture>
                    <source width="1180" height="500" type="image/webp" class="lazyload" data-srcset="http://satyr.io/1180x500?2&type=webp&text=webp@1x&texture=graphpaper&delay=2g 1x,
                 http://satyr.io/2360x1000?type=webp&text=webp@2x&texture=graphpaper&delay=2g 2x"/>
                    <source width="1180" height="500" type="image/jpeg" class="lazyload" data-srcset="http://satyr.io/1180x500?2&type=jpg&text=jpg@1x&texture=graphpaper&delay=2g 1x,
                 http://satyr.io/2360x1000?type=jpeg&text=jpeg@2x&texture=graphpaper&delay=3g 2x"/>
                    <img width="1180" height="500" class="lazyload"
                         data-src="http://satyr.io/1180x500?2&type=jpeg&text=jpeg@1x&texture=graphpaper&delay=3g" alt=""/></picture>
            </foreignObject>

Answer 2

<svg>
  <image
    href="hello-world.jpg"
    x="20" y="20"
    height="160" width="160"
  />
</svg>

mozilla docs: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/image

duplicate of Does SVG support embedding of bitmap images?