Lazy loaded image placeholder

lazy-image-placeholder.html

<!-- Source: https://twitter.com/etportis/status/1113887359555100672 -->

<img src="data:image/svg+xml;charset=utf-8,
    <svg xmlns='http://www.w3.org/2000/svg '
      width='1280' height='720' />"
  data-src="lazy.jpg"
  alt="A lazy Jpeg" />