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code/public/template/shikong/js/lozad.js
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82
code/public/template/shikong/js/lozad.js
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/*! lozad.js - v1.16.0 - 2020-09-06
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* https://github.com/ApoorvSaxena/lozad.js
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* Copyright (c) 2020 Apoorv Saxena; Licensed MIT */
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!function (t, e) {
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"object" == typeof exports && "undefined" != typeof module ? module.exports = e() : "function" == typeof define && define.amd ? define(e) : t.lozad = e()
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}(this, function () {
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"use strict";
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/**
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* Detect IE browser
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* @const {boolean}
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* @private
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*/
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var g = "undefined" != typeof document && document.documentMode,
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f = {
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rootMargin: "0px",
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threshold: 0,
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load: function (t) {
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if ("picture" === t.nodeName.toLowerCase()) {
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var e = t.querySelector("img"),
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r = !1;
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null === e && (e = document.createElement("img"), r = !0), g && t.getAttribute("data-iesrc") && (e.src = t.getAttribute("data-iesrc")), t.getAttribute("data-alt") && (e.alt = t.getAttribute("data-alt")), r && t.append(e)
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}
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if ("video" === t.nodeName.toLowerCase() && !t.getAttribute("data-src") && t.children) {
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for (var a = t.children, o = void 0, i = 0; i <= a.length - 1; i++)(o = a[i].getAttribute("data-src")) && (a[i].src = o);
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t.load()
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}
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t.getAttribute("data-poster") && (t.poster = t.getAttribute("data-poster")), t.getAttribute("data-src") && (t.src = t.getAttribute("data-src")), t.getAttribute("data-srcset") && t.setAttribute("srcset", t.getAttribute("data-srcset"));
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var n = ",";
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if (t.getAttribute("data-background-delimiter") && (n = t.getAttribute("data-background-delimiter")), t.getAttribute("data-background-image")) t.style.backgroundImage = "url('" + t.getAttribute("data-background-image").split(n).join("'),url('") + "')";
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else if (t.getAttribute("data-background-image-set")) {
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var d = t.getAttribute("data-background-image-set").split(n),
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u = d[0].substr(0, d[0].indexOf(" ")) || d[0]; // Substring before ... 1x
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u = -1 === u.indexOf("url(") ? "url(" + u + ")" : u, 1 === d.length ? t.style.backgroundImage = u : t.setAttribute("style", (t.getAttribute("style") || "") + "background-image: " + u + "; background-image: -webkit-image-set(" + d + "); background-image: image-set(" + d + ")")
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}
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t.getAttribute("data-toggle-class") && t.classList.toggle(t.getAttribute("data-toggle-class"))
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},
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loaded: function () {}
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};
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function A(t) {
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t.setAttribute("data-loaded", !0)
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}
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var m = function (t) {
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return "true" === t.getAttribute("data-loaded")
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},
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v = function (t) {
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var e = 1 < arguments.length && void 0 !== arguments[1] ? arguments[1] : document;
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return t instanceof Element ? [t] : t instanceof NodeList ? t : e.querySelectorAll(t)
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};
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return function () {
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var r, a, o = 0 < arguments.length && void 0 !== arguments[0] ? arguments[0] : ".lozad",
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t = 1 < arguments.length && void 0 !== arguments[1] ? arguments[1] : {},
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e = Object.assign({}, f, t),
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i = e.root,
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n = e.rootMargin,
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d = e.threshold,
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u = e.load,
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g = e.loaded,
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s = void 0;
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"undefined" != typeof window && window.IntersectionObserver && (s = new IntersectionObserver((r = u, a = g,
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function (t, e) {
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t.forEach(function (t) {
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(0 < t.intersectionRatio || t.isIntersecting) && (e.unobserve(t.target), m(t.target) || (r(t.target), A(t.target), a(t.target)))
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})
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}), {
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root: i,
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rootMargin: n,
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threshold: d
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}));
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for (var c, l = v(o, i), b = 0; b < l.length; b++)(c = l[b]).getAttribute("data-placeholder-background") && (c.style.background = c.getAttribute("data-placeholder-background"));
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return {
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observe: function () {
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for (var t = v(o, i), e = 0; e < t.length; e++) m(t[e]) || (s ? s.observe(t[e]) : (u(t[e]), A(t[e]), g(t[e])))
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},
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triggerLoad: function (t) {
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m(t) || (u(t), A(t), g(t))
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},
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observer: s
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}
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}
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});
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