webp image with fallback

<picture>
  <source media="(max-width: 600px)" srcset="image-mobile.jpg" type="image/webp">
  <source media="(min-width: 601px)" srcset="image.jpg" type="image/webp">
  <source srcset="image.png" type="image/png">
  <img aria-hidden="true" src="image.png" alt="image description" width="100" height="100">
</picture>