https://www.ypmj.co.jp/shared/js/layzr.min.js

1/*!
2 * Layzr.js 2.0.2 - A small, fast, and modern library for lazy loading images.
3 * Copyright (c) 2016 Michael Cavalea - http://callmecavs.github.io/layzr.js/
4 * License: MIT
5 */
6!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var t;t="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,t.Layzr=e()}}(function(){var e;return function t(e,n,r){function o(u,f){if(!n[u]){if(!e[u]){var s="function"==typeof require&&require;if(!f&&s)return s(u,!0);if(i)return i(u,!0);var c=new Error("Cannot find module '"+u+"'");throw c.code="MODULE_NOT_FOUND",c}var a=n[u]={exports:{}};e[u][0].call(a.exports,function(t){var n=e[u][1][t];return o(n?n:t)},a,a.exports,t,e,n,r)}return n[u].exports}for(var i="function"==typeof require&&require,u=0;u<r.length;u++)o(r[u]);return o}({1:[function(t,n,r){(function(o){!function(t){if("object"==typeof r&&"undefined"!=typeof n)n.exports=t();else if("function"==typeof e&&e.amd)e([],t);else{var i;i="undefined"!=typeof window?window:"undefined"!=typeof o?o:"undefined"!=typeof self?self:this,i.Knot=t()}}(function(){return function e(n,r,o){function i(f,s){if(!r[f]){if(!n[f]){var c="function"==typeof t&&t;if(!s&&c)return c(f,!0);if(u)return u(f,!0);var a=new Error("Cannot find module '"+f+"'");throw a.code="MODULE_NOT_FOUND",a}var d=r[f]={exports:{}};n[f][0].call(d.exports,function(e){var t=n[f][1][e];return i(t?t:e)},d,d.exports,e,n,r,o)}return r[f].exports}for(var u="function"==typeof t&&t,f=0;f<o.length;f++)i(o[f]);return i}({1:[function(e,t,n){"use strict";Object.defineProperty(n,"__esModule",{value:!0}),n["default"]=function(){var e=arguments.length<=0||void 0===arguments[0]?{}:arguments[0];return e.events={},e.on=function(t,n){return e.events[t]=e.events[t]||[],e.events[t].push(n),e},e.once=function(t,n){return n._once=!0,e.on(t,n),e},e.off=function(t,n){return 2===arguments.length?e.events[t].splice(e.events[t].indexOf(n),1):delete e.events[t],e},e.emit=function(t){for(var n=arguments.length,r=Array(n>1?n-1:0),o=1;n>o;o++)r[o-1]=arguments[o];var i=e.events[t]&&e.events[t].slice();return i&&i.forEach(function(n){n._once&&e.off(t,n),n.apply(e,r)}),e},e},t.exports=n["default"]},{}]},{},[1])(1)})}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{}],2:[function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{"default":e}}Object.defineProperty(n,"__esModule",{value:!0});var o=e("knot.js"),i=r(o);n["default"]=function(){function e(){return window.scrollY||window.pageYOffset}function t(){d=e(),n()}function n(){l||(requestAnimationFrame(function(){return s()}),l=!0)}function r(e){return e.getBoundingClientRect().top+d}function o(e){var t=d,n=t+v,o=r(e),i=o+e.offsetHeight,u=m.threshold/100*v;return i>=t-u&&n+u>=o}function u(e){if(g.emit("src:before",e),h&&e.hasAttribute(m.srcset))e.setAttribute("srcset",e.getAttribute(m.srcset));else{var t=w>1&&e.getAttribute(m.retina);e.setAttribute("src",t||e.getAttribute(m.normal))}g.emit("src:after",e),[m.normal,m.retina,m.srcset].forEach(function(t){return e.removeAttribute(t)}),c()}function f(e){var n=e?"addEventListener":"removeEventListener";return["scroll","resize"].forEach(function(e){return window[n](e,t)}),this}function s(){return v=window.innerHeight,p.forEach(function(e){return o(e)&&u(e)}),l=!1,this}function c(){return p=Array.prototype.slice.call(document.querySelectorAll("["+m.normal+"]")),this}var a=arguments.length<=0||void 0===arguments[0]?{}:arguments[0],d=e(),l=void 0,p=void 0,v=void 0,m={normal:a.normal||"data-normal",retina:a.retina||"data-retina",srcset:a.srcset||"data-srcset",threshold:a.threshold||0},h=document.body.classList.contains("srcset")||"srcset"in document.createElement("img"),w=window.devicePixelRatio||window.screen.deviceXDPI/window.screen.logicalXDPI,g=(0,i["default"])({handlers:f,check:s,update:c});return g},t.exports=n["default"]},{"knot.js":1}]},{},[2])(2)});