Created
September 16, 2021 07:01
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images lazy load
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| (function ($) { | |
| var lazy_images_elements = [].slice.call(document.querySelectorAll("[data-lazy-src]")); | |
| if ("IntersectionObserver" in window) { | |
| var lazy_src_observer = new IntersectionObserver(function (entries, observer) { | |
| entries.forEach(function (entry) { | |
| if (entry.isIntersecting) { | |
| var $lazy = $(entry.target); | |
| $lazy.attr("src", $lazy.attr("data-lazy-src")) | |
| .attr("srcset", $lazy.attr("data-lazy-srcset")) | |
| .attr("data-lazy-src", null) | |
| .attr("data-lazy-srcset", null); | |
| lazy_src_observer.unobserve(entry.target); | |
| } | |
| }); | |
| }); | |
| lazy_images_elements.forEach(function(element){ | |
| lazy_src_observer.observe(element); | |
| }); | |
| } else { | |
| // todo: fallback if no IntersectionObserver | |
| } | |
| lazy_images_elements = []; | |
| $(function () { | |
| // observe_lazy_images($("[data-lazy-src]")); | |
| var $lazy_css_backgrounds = $(".lazy-image"); | |
| if ("IntersectionObserver" in window) { | |
| var lazy_css_observer = new IntersectionObserver(function (entries, observer) { | |
| entries.forEach(function (entry) { | |
| if (entry.isIntersecting) { | |
| $(entry.target).addClass("lazy-visible"); | |
| } | |
| }); | |
| }); | |
| $lazy_css_backgrounds.each(function () { | |
| lazy_css_observer.observe(this); | |
| }) | |
| } else { | |
| } | |
| }); | |
| })(jQuery); |
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