DS7/DSCustomer/js/jquery/lib/jquery.xLazyLoader.js

126 lines
2.9 KiB
JavaScript

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