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126 lines
2.9 KiB
JavaScript
126 lines
2.9 KiB
JavaScript
3 years ago
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;(function($){
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$.xLazyLoader = function ( method, options ) {
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if (typeof method == 'object') {
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options = method;
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method = 'load';
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};
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xLazyLoader[method]( options );
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};
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var xLazyLoader = new function ()
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{
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var head = document.getElementsByTagName("head")[0];
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this.load = function ( options )
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{
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//Defaults
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var d = {
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js: [],
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css: [],
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image: [],
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name: null,
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load: function(){}
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};
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$.extend(d, options);
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var self = this,
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ready = false,
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loaded = {
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js: [],
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css: [],
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image: []
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};
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each('js', d.js);
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each('css', d.css);
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each('image', d.image);
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function each (type, urls)
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{
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if ( $.isArray(urls) && urls.length>0 )
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$.each( urls, function(i, url){
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load(type, url);
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});
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else if (typeof urls == 'string')
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load(type, urls);
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};
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function load (type, url)
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{
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self[type](url, function() {
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$.isArray(d[type]) ? loaded[type].push(url) : loaded[type] = url;
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d.js.length == loaded.js.length
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&& d.css.length == loaded.css.length
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&& d.image.length == loaded.image.length
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&& d.load.apply(loaded, []);
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return;
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}, d.name ?'lazy-loaded-'+ d.name : 'lazy-loaded-'+new Date().getTime());
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};
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};
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this.js = function (src, callback, name)
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{
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if ($('script[src*="'+src+'"]').length>0) {
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callback();
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return;
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};
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var script = document.createElement('script');
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script.setAttribute("type","text/javascript");
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script.setAttribute("src", src);
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script.setAttribute('id', name);
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if ($.browser.msie)
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script.onreadystatechange = function () {
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/loaded|complete/.test(script.readyState) && callback();
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}
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else
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//FF, Safari, Opera
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script.onload = callback;
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head.appendChild(script);
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};
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this.css = function (href, callback, name)
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{
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if ($('link[href*="'+href+'"]').length>0) {
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callback();
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return;
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};
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var link = $('<link rel="stylesheet" type="text/css" media="all" href="'+href+'" id="'+name+'"></link>')[0];
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if ($.browser.msie)
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link.onreadystatechange = function () {
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/loaded|complete/.test(link.readyState) && callback();
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}
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else if ($.browser.opera)
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link.onload = callback;
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else
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//FF, Safari, Chrome
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(function(){
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try {
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link.sheet.cssRule;
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} catch(e){
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setTimeout(arguments.callee, 20);
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return;
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};
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callback();
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})();
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head.appendChild(link);
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};
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this.image = function (src, callback)
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{
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var img = new Image();
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img.onload = callback;
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img.src = src;
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};
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this.disable = function ( name )
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{
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$('#lazy-loaded-'+name, head).attr('disabled', 'disabled');
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};
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this.enable = function ( name )
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{
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$('#lazy-loaded-'+name, head).removeAttr('disabled');
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};
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this.destroy = function ( name )
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{
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$('#lazy-loaded-'+name, head).remove();
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};
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};
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})(jQuery);
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