65 lines
2.9 KiB
JavaScript
65 lines
2.9 KiB
JavaScript
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/*! HTMLInclude v1.1.1 | MIT License | github.com/paul-browne/HTMLInclude */
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!function(w, d) {
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if (!w.HTMLInclude) {
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w.HTMLInclude = function() {
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function isInViewport(element, offset) {
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return element.getBoundingClientRect().top <= (+offset + w.innerHeight);
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}
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function ajax(url, elements) {
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var xhr = new XMLHttpRequest();
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xhr.onreadystatechange = function() {
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if (xhr.readyState == 4 && xhr.status == 200) {
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elements.forEach(function(element) {
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var dataReplace = element.getAttribute("data-replace");
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var z = xhr.responseText;
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if (dataReplace) {
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dataReplace.split(",").forEach(function(el) {
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var o = el.trim().split(":");
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z = z.replace(new RegExp(o[0], "g"), o[1]);
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});
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}
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element.outerHTML = z;
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var scripts = new DOMParser().parseFromString(z, 'text/html').querySelectorAll("SCRIPT");
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var i = 0;
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var j = scripts.length;
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while (i < j) {
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var newScript = d.createElement("SCRIPT");
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scripts[i].src ? newScript.src = scripts[i].src : newScript.innerHTML = scripts[i].innerHTML;
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d.head.appendChild(newScript);
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i++;
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}
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});
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}
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};
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xhr.open("GET", url, true);
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xhr.send();
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}
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function lazyLoad(element, offset) {
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w.addEventListener("scroll", function scrollFunc() {
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if (isInViewport(element, offset)) {
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w.removeEventListener("scroll", scrollFunc);
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ajax(element.getAttribute("data-include"), [element]);
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}
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})
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}
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var store = {};
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var dis = d.querySelectorAll('[data-include]:not([data-in])');
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var i = dis.length;
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while (i--) {
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var di = dis[i].getAttribute('data-include');
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var laziness = dis[i].getAttribute('data-lazy');
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dis[i].setAttribute("data-in", "");
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if (!laziness || (laziness && isInViewport(dis[i], laziness))) {
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store[di] = store[di] || [];
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store[di].push(dis[i]);
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} else {
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lazyLoad(dis[i], laziness);
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}
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}
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for (var key in store) {
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ajax(key, store[key]);
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}
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}
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}
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w.HTMLInclude();
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}(window, document)
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