52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
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/*
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This lazySizes extension adds better support for print.
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In case the user starts to print lazysizes will load all images.
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*/
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(function(window, factory) {
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var globalInstall = function(){
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factory(window.lazySizes);
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window.removeEventListener('lazyunveilread', globalInstall, true);
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};
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factory = factory.bind(null, window, window.document);
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if(typeof module == 'object' && module.exports){
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factory(require('lazysizes'));
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} else if(window.lazySizes) {
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globalInstall();
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} else {
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window.addEventListener('lazyunveilread', globalInstall, true);
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}
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}(window, function(window, document, lazySizes) {
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/*jshint eqnull:true */
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'use strict';
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var config, elements, onprint, printMedia;
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// see also: http://tjvantoll.com/2012/06/15/detecting-print-requests-with-javascript/
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if(window.addEventListener){
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config = lazySizes && lazySizes.cfg;
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elements = config.lazyClass || 'lazyload';
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onprint = function(){
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var i, len;
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if(typeof elements == 'string'){
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elements = document.getElementsByClassName(elements);
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}
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if(lazySizes){
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for(i = 0, len = elements.length; i < len; i++){
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lazySizes.loader.unveil(elements[i]);
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}
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}
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};
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addEventListener('beforeprint', onprint, false);
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if(!('onbeforeprint' in window) && window.matchMedia && (printMedia = matchMedia('print')) && printMedia.addListener){
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printMedia.addListener(function(){
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if(printMedia.matches){
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onprint();
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}
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});
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}
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}
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}));
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