mirror of
https://github.com/StarCitizenTools/mediawiki-skins-Citizen.git
synced 2024-11-18 19:55:59 +00:00
29 lines
999 B
JavaScript
29 lines
999 B
JavaScript
/*
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* Citizen - Lazyload JS
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* https://starcitizen.tools
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*
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* Lazyloading images with Native API or IntersectionObserver
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*/
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// TODO: Implement Native API
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// IntersectionObserver API
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if( typeof IntersectionObserver !== "undefined" && "forEach" in NodeList.prototype ) {
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var observer = new IntersectionObserver(function(changes) {
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if ("connection" in navigator && navigator.connection.saveData === true) {
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return;
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}
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changes.forEach(function(change) {
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if(change.isIntersecting) {
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change.target.setAttribute("src", change.target.getAttribute("data-src"));
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if(change.target.hasAttribute("srcset")) {
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change.target.setAttribute("srcset", change.target.getAttribute("data-srcset"));
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}
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observer.unobserve(change.target);
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}
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});
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});
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document.querySelectorAll("img[data-src]").forEach(function(img) {
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observer.observe(img);
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});
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} |