(function (d, w) {
  var lazyPictures = [].slice.call(d.querySelectorAll("picture.lazy"));
  var manageLaziness = function (lazyPicture) {
    var lazyImage = lazyPicture.querySelector("img");
    lazyImage.src = lazyImage.getAttribute("data-src");
    var lazySources = lazyPicture.querySelectorAll("source");
    for (var j = 0; j < lazySources.length; j++) {
      var lazySource = lazySources[j];
      lazySource.srcset = lazySource.getAttribute("data-srcset");
    }
    if (w.addEventListener) {
      var fallbackTimeout = setTimeout(function () {
        lazyPicture.className = lazyPicture.className.replace("lazy", "");
      }, 500);
      lazyImage.addEventListener("load", function () {
        lazyPicture.className = lazyPicture.className.replace("lazy", "");
        clearTimeout(fallbackTimeout);
      });
      return;
    }
    lazyPicture.className = lazyPicture.className.replace("lazy", "");
  };
  if ("IntersectionObserver" in w) {
    var lazyImageObserver = new IntersectionObserver(function (entries, observer) {
      for (var i = 0; i < entries.length; i++) {
        var entry = entries[i];
        if (!entry.isIntersecting) {
          continue;
        }
        var lazyPicture = entry.target;
        manageLaziness(lazyPicture);
        lazyImageObserver.unobserve(lazyPicture);
      }
    });

    for (var i = 0; i < lazyPictures.length; i++) {
      var lazyPicture = lazyPictures[i];
      lazyImageObserver.observe(lazyPicture);
    }
  } else {
    var lazyFallback = function () {
      for (var x = 0; x < lazyPictures.length; x++) {
        var lazyPicture = lazyPictures[x];
        if ((lazyPicture.getBoundingClientRect().top <= w.innerHeight && lazyPicture.getBoundingClientRect().bottom >= 0) && getComputedStyle(lazyPicture).display !== "none") {
          manageLaziness(lazyPicture);
        }
      }
      if (d.querySelectorAll("picture.lazy").length) {
        requestAnimationFrame(lazyFallback);
      }
    };
    requestAnimationFrame(lazyFallback);
  }
}(document, window));