const hasWindow = typeof window !== 'undefined'; const environment = Math.round(hasWindow ? window.devicePixelRatio || 1 : 1); const srcReplace = /(.[A-z]{3,4}/?(?.*)?)$/; const inlineReplace = /url((‘|“)?(+)('|”)?)/i; const selector = '[data-rjs]'; const processedAttr = 'data-rjs-processed'; function arrayify(object) {

return Array.prototype.slice.call(object);

} function chooseCap(cap) {

const numericCap = parseInt(cap, 10);
if (environment < numericCap) {
  return environment;
} else {
  return numericCap;
}

} function forceOriginalDimensions(image) {

if (!image.hasAttribute('data-no-resize')) {
  if (image.offsetWidth === 0 && image.offsetHeight === 0) {
    image.setAttribute('width', image.naturalWidth);
    image.setAttribute('height', image.naturalHeight);
  } else {
    image.setAttribute('width', image.offsetWidth);
    image.setAttribute('height', image.offsetHeight);
  }
}
return image;

} function setSourceIfAvailable(image, retinaURL) {

const imgType = image.nodeName.toLowerCase();
const testImage = document.createElement('img');
testImage.addEventListener('load', () => {
  if (imgType === 'img') {
    forceOriginalDimensions(image).setAttribute('src', retinaURL);
  } else {
    image.style.backgroundImage = `url(${retinaURL})`;
  }
});
testImage.setAttribute('src', retinaURL);
image.setAttribute(processedAttr, true);

} function dynamicSwapImage(image, src, rjs = 1) {

const cap = chooseCap(rjs);
if (src && cap > 1) {
  const newSrc = src.replace(srcReplace, `@${cap}x$1`);
  setSourceIfAvailable(image, newSrc);
}

} function manualSwapImage(image, src, hdsrc) {

if (environment > 1) {
  setSourceIfAvailable(image, hdsrc);
}

} function getImages(images) {

if (!images) {
  return typeof document !== 'undefined' ? arrayify(document.querySelectorAll(selector)) : [];
} else {
  return typeof images.forEach === 'function' ? images : arrayify(images);
}

} function cleanBgImg(img) {

return img.style.backgroundImage.replace(inlineReplace, '$2');

} function retina(images) {

getImages(images).forEach(img => {
  if (!img.getAttribute(processedAttr)) {
    const isImg = img.nodeName.toLowerCase() === 'img';
    const src = isImg ? img.getAttribute('src') : cleanBgImg(img);
    const rjs = img.getAttribute('data-rjs');
    const rjsIsNumber = !isNaN(parseInt(rjs, 10));
    if (rjs === null) {
      return;
    }
    if (rjsIsNumber) {
      dynamicSwapImage(img, src, rjs);
    } else {
      manualSwapImage(img, src, rjs);
    }
  }
});

} if (hasWindow) {

window.addEventListener('load', () => {
  retina();
});
window.retinajs = retina;

}

export default retina; //# sourceMappingURL=retina.js.map