Browers now support the loading= attribute which allows you to specify if images should be lazy loaded:

<img src="image.png" loading="lazy" alt="…" width="200" height="200">

Options:

• “auto”
  Default lazy-loading behavior of the browser (same as not including the attribute).
• “lazy”
  Defer loading of the resource until it reaches a calculated distance from the viewport.
• “eager”
  Load the resource immediately, regardless of where it’s located on the page.