lqip support

[tilman]

In https://github.com/cyrilwanner/next-optimized-images/issues/120 you mentioned that this Img Component should also support an lqip placeholder. Is there any progress on this? Would love to try it out! :)

[cyrilwanner]

It is one of the features I'll be working on over the next weeks, but it isn't in canary yet. I'll notify you once it can get tested.

[allan2]

Are there any plans for trace too?

I think an <ImgLoader> component for the placeholders would be cool. I could see that getting a lot of use.

Like this, but with same props as v3 <Img> like webp and resize.

/** Placeholder component for next-optimized-images v2 using image-trace-loader
    Credit given to https://github.com/EmilTholin/image-trace-loader **/

const ImgLoader = ({ traceObject, alt }: Props) => {
  const [imageLoaded, setImageLoaded] = useState(false);

  return (
    <div css={animation}>
      <img
        css={[animation, { position: 'absolute', opacity: imageLoaded ? 1 : 0 }]}
        src={traceObject.src}
        alt={alt}
        loading="lazy"
        onLoad={() => setImageLoaded(true)}
      />

      <img css={{ opacity: imageLoaded ? 0 : 1 }} src={traceObject.trace} alt={alt} />
    </div>
  );
};

WebP + resize + your choice of placeholder is a potent combo indeed!

[cyrilwanner]

Are there any plans for trace too?

Yes, I plan to provide a component for all lazy loading techniques, like <BlurUp>, <Trace>, etc. The API will probably be like this so you can use all normal properties of the <Img> tag and use resizing or webp conversion as you like:

<BlurUp>
    <Img src={image} webp sizes={[500, 1000]} />
</BlurUp>

[tilman]

I already created a Placeholder component on my own in the meantime. Feel free to reuse anything you want from this component for this project: https://github.com/tilman/react-intersection-placeholder Also if you need help I'm glad to help :)

It uses an Intersection Observer to only display the child if it is near the viewport.

import Img from 'react-optimized-image';
import TestImg from 'test.png';
import TestImgLqip from 'test.png?lqip';
...
<IntersectionPlaceholder
    src={TestImg} // original image needed for having the right dimensions
    lqip={TestImgLqip} // pass your placeholder image here
    observerOptions={{ threshold: 0.5 }} // you can also pass options for the intersection observer. Use the same config object as you would use to init the intersection observer.
>
    <Img src={TestImg} />
</IntersectionPlaceholder>