@fremtind/jkl-react-hooks/build/esm/useProgressiveImg/useProgressiveImg.js

Jøkul react button components

import { useState, useEffect } from "react";
const useProgressiveImg = ({
  lowQualitySrc,
  highQualitySrc
}) => {
  const [src, setSrc] = useState(lowQualitySrc);
  useEffect(() => {
    setSrc(lowQualitySrc);
    const img = new Image();
    img.src = highQualitySrc;
    img.onload = () => {
      setSrc(highQualitySrc);
    };
  }, [lowQualitySrc, highQualitySrc]);
  return { src, isBlurred: src === lowQualitySrc };
};
export {
  useProgressiveImg
};
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