Simple spy is very useful jquery plugin/Code! but i see this not cache image and send many request to server! any one know what's problem ?
Spy Code :
$(function () {
$('ul.spy').simpleSpy();
});
(function ($) {
$.fn.simpleSpy = function (limit, interval) {
limit = limit || 4;
interval = interval || 4000;
return this.each(function () {
// 1. setup
// capture a cache of all the list items
// chomp the list down to limit li elements
var $list = $(this),
items = [], // uninitialised
currentItem = limit,
total = 0, // initialise later on
height = $list.find('> li:first').height();
// capture the cache
$list.find('> li').each(function () {
items.push('<li>' + $(this).html() + '</li>');
});
total = items.length;
$list.wrap('<div class="spyWrapper" />').parent().css({ height : height * limit });
$list.find('> li').filter(':gt(' + (limit - 1) + ')').remove();
// 2. effect
function spy() {
// insert a new item with opacity and height of zero
var $insert = $(items[currentItem]).css({
height : 0,
opacity : 0
}).prependTo($list);
// fade the LAST item out
$list.find('> li:last').animate({ opacity : 0}, 1000, function () {
// increase the height of the NEW first item
$insert.animate({ height : height }, 1000).animate({ opacity : 1 }, 1000);
// AND at the same time - decrease the height of the LAST item
// $(this).animate({ height : 0 }, 1000, function () {
// finally fade the first item in (and we can remove the last)
$(this).remove();
// });
});
currentItem++;
if (currentItem >= total) {
currentItem = 0;
}
setTimeout(spy, interval)
}
spy();
});
};
})(jQuery);
Orginal Source : http://jqueryfordesigners.com/demo/simple-spy.html Demo Ib JsFiddle : http://jsfiddle.net/treeface/xaJ9F/ Picture of firebug : ...
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