User:Messing with data/vector.js: Difference between revisions

$(document).ready(function() {
  var lazyImages = [].slice.call(document.querySelectorAll(".lazy-img"));
  console.log("Images to lazy load:", lazyImages.length);
  if ("IntersectionObserver" in window) {
    var lazyImageObserver = new IntersectionObserver(function(entries, observer) {
      entries.forEach(function(entry) {
        if (entry.isIntersecting) {
          var lazyImage = entry.target;
          if (lazyImage.dataset.src) { lazyImage.src = lazyImage.dataset.src; }
          if (lazyImage.dataset.srcset) { lazyImage.srcset = lazyImage.dataset.srcset; }
          lazyImage.classList.remove("lazy-img");
          lazyImageObserver.unobserve(lazyImage);
        }
      });
    });

    lazyImages.forEach(function(lazyImage) {
      lazyImageObserver.observe(lazyImage);
    });
  } else {
    // Possibly fall back to event handlers here
    console.log("Lazy Loading seems to have failed.");
  }
});