3 lines
2.0 KiB
JavaScript
3 lines
2.0 KiB
JavaScript
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/*! Lazy Load 2.0.0-beta.2 - MIT license - Copyright 2007-2017 Mika Tuupola */
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!function(t,e){"object"==typeof exports?module.exports=e(t):"function"==typeof define&&define.amd?define([],e(t)):t.LazyLoad=e(t)}("undefined"!=typeof global?global:this.window||this.global,function(t){"use strict";function e(t,e){this.settings=r(s,e||{}),this.images=t||document.querySelectorAll(this.settings.selector),this.observer=null,this.init()}const s={src:"data-src",srcset:"data-srcset",selector:".lazyload"},r=function(){let t={},e=!1,s=0,o=arguments.length;"[object Boolean]"===Object.prototype.toString.call(arguments[0])&&(e=arguments[0],s++);for(;s<o;s++)!function(s){for(let o in s)Object.prototype.hasOwnProperty.call(s,o)&&(e&&"[object Object]"===Object.prototype.toString.call(s[o])?t[o]=r(!0,t[o],s[o]):t[o]=s[o])}(arguments[s]);return t};if(e.prototype={init:function(){if(!t.IntersectionObserver)return void this.loadImages();let e=this,s={root:null,rootMargin:"0px",threshold:[0]};this.observer=new IntersectionObserver(function(t){t.forEach(function(t){if(t.intersectionRatio>0){e.observer.unobserve(t.target);let s=t.target.getAttribute(e.settings.src),r=t.target.getAttribute(e.settings.srcset);"img"===t.target.tagName.toLowerCase()?(s&&(t.target.src=s),r&&(t.target.srcset=r)):t.target.style.backgroundImage="url("+s+")"}})},s),this.images.forEach(function(t){e.observer.observe(t)})},loadAndDestroy:function(){this.settings&&(this.loadImages(),this.destroy())},loadImages:function(){if(!this.settings)return;let t=this;this.images.forEach(function(e){let s=e.getAttribute(t.settings.src),r=e.getAttribute(t.settings.srcset);"img"===e.tagName.toLowerCase()?(s&&(e.src=s),r&&(e.srcset=r)):e.style.backgroundImage="url("+s+")"})},destroy:function(){this.settings&&(this.observer.disconnect(),this.settings=null)}},t.lazyload=function(t,s){return new e(t,s)},t.jQuery){const s=t.jQuery;s.fn.lazyload=function(t){return t=t||{},t.attribute=t.attribute||"data-src",new e(s.makeArray(this),t),this}}return e});
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