https://www.queerbuzz.com/js/vendor/fixedFixed/fixedfixed.build.r40242.js

1/*! fixed-fixed - v0.1.0 - 2014-05-23
2* Copyright (c) 2014 ; Licensed MIT */
3/*! Fixedfixed: a CSS position:fixed qualifier. (c)2012 @scottjehl, Filament Group, Inc. Dual license: MIT and/or GPLv2 */
4(function(w, undefined) {
5    var htmlclass = "fixed-supported", el = w.document.createElement("div"), ua = w.navigator.userAgent, docEl = w.document.documentElement;
6    // fix the test element
7    el.style.position = "fixed";
8    el.style.top = 0;
9    // support test
10    function checkFixed() {
11        var scroll = "scrollTop" in w.document.body ? w.document.body.scrollTop : docEl.scrollTop;
12        // only run test if there's a scroll we can compare
13        if (scroll !== undefined && scroll > 0 && w.document.body) {
14            w.document.body.insertBefore(el, w.document.body.firstChild);
15            // Fix: On IOS 'getBoundingClientRect().top' returned the incorrect results for elements
16            if (ua.match(/(iPhone|iPad|iPod)/)) {
17                if (el.offsetTop !== 0) {
18                    // Fixed is not working or can't be tested
19                    docEl.className = docEl.className.replace(htmlclass, "");
20                }
21            } else {
22                if (!el.getBoundingClientRect || el.getBoundingClientRect().top !== 0) {
23                    // Fixed is not working or can't be tested
24                    docEl.className = docEl.className.replace(htmlclass, "");
25                }
26            }
27            // remove the test element
28            w.document.body.removeChild(el);
29            // unbind the handlers
30            if (w.removeEventListener) {
31                w.removeEventListener("scroll", checkFixed, false);
32            } else {
33                w.detachEvent("onscroll", checkFixed);
34            }
35        }
36    }
37    // if a particular UA is known to return false results with this feature test, try and avoid that UA here.
38    if (// Android 2.1, 2.2, 2.5, and 2.6 Webkit
39    !(ua.match(/Android 2\.[1256]/) && ua.indexOf("AppleWebKit") > -1) || // Opera Mobile less than version 11.0 (7458)
40    !(ua.match(/Opera Mobi\/([0-9]+)/) && RegExp.$1 < 7458) || // Opera Mini
41    !(ua.match(/(iPhone|iPad|iPod) (OS [0-4]+)/)) || // Iphone / Ipad / Ipod
42    !(w.operamini && {}.toString.call(w.operamini) === "[object OperaMini]") || // Firefox Mobile less than version 6
43    !(ua.match(/Fennec\/([0-9]+)/) && RegExp.$1 < 6)) {
44        //add the HTML class for now.
45        docEl.className += " " + htmlclass;
46        // bind to scroll event so we can test and potentially degrade
47        if (w.addEventListener) {
48            w.addEventListener("scroll", checkFixed, false);
49        } else {
50            w.attachEvent("onscroll", checkFixed);
51        }
52    }
53    w.FixedFixed = checkFixed;
54})(this);