Sha256: 89a13956be67527dd669a271539cd5a0aaf6ebe90e81dc25156fe002f18cd0f3
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Size: 1.29 KB
Versions: 4
Compression:
Stored size: 1.29 KB
Contents
/**
* jQuery Unveil
* A very lightweight jQuery plugin to lazy load images
* http://luis-almeida.github.com/unveil
*
* Licensed under the MIT license.
* Copyright 2013 Luís Almeida
* https://github.com/luis-almeida
*/
;(function($) {
$.fn.unveil = function(threshold, callback) {
var $w = $(window),
th = threshold || 0,
retina = window.devicePixelRatio > 1,
attrib = retina? "data-src-retina" : "data-src",
images = this,
loaded;
this.one("unveil", function() {
var source = this.getAttribute(attrib);
source = source || this.getAttribute("data-src");
if (source) {
this.setAttribute("src", source);
if (typeof callback === "function") callback.call(this);
}
});
function unveil() {
var inview = images.filter(function() {
var $e = $(this);
if ($e.is(":hidden")) return;
var wt = $w.scrollTop(),
wb = wt + $w.height(),
et = $e.offset().top,
eb = et + $e.height();
return eb >= wt - th && et <= wb + th;
});
loaded = inview.trigger("unveil");
images = images.not(loaded);
}
$w.on("scroll.unveil resize.unveil lookup.unveil", unveil);
unveil();
return this;
};
})(window.jQuery || window.Zepto);
Version data entries
4 entries across 4 versions & 2 rubygems