@next/next/no-img-element

An <img> sends the same file to every device, so a phone downloads the picture made for a desktop screen, in whatever format you saved it in. Image from next/image resizes the picture for the screen, serves a modern format, only loads it when it gets near the viewport, and reserves its space so the layout doesn't jump.

An <img> that's a direct child of a <picture> is allowed.

Configure#

Off by default. To turn it on:

[lint.rules]
"@next/next/no-img-element" = "error" # or "warn"

Examples#

export default function Avatar({ user }) {
  return <img src="/avatars/default.png" alt={user.name} />;
}

import Image from "next/image";

export default function Avatar({ user }) {
  return <Image src="/avatars/default.png" alt={user.name} width={64} height={64} />;
}

export default function Hero() {
  return (
    <picture>
      <source srcSet="/hero.avif" type="image/avif" />
      <img src="/hero.jpg" alt="Our office" />
    </picture>
  );
}

When not to use it#

Image optimization runs on a server, and some hosts bill for it. If you export a static site or your images already come from an image CDN, a plain <img> can be the right choice.