1/*! Respond.js v1.4.2: min/max-width media query polyfill� 2 * Copyright 2014 Scott Jehl� 3 * Licensed under MIT� 4 * http://j.mp/respondjs */� 5� 6/*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas. Dual MIT/BSD license */� 7/*! NOTE: If you're already including a window.matchMedia polyfill via Modernizr or otherwise, you don't need this part */� 8(function(w) {� 9 "use strict";� 10 w.matchMedia = w.matchMedia || function(doc, undefined) {� 11 var bool, docElem = doc.documentElement, refNode = docElem.firstElementChild || docElem.firstChild, fakeBody = doc.createElement("body"), div = doc.createElement("div");� 12 div.id = "mq-test-1";� 13 div.style.cssText = "position:absolute;top:-100em";� 14 fakeBody.style.background = "none";� 15 fakeBody.appendChild(div);� 16 return function(q) {� 17 div.innerHTML = '­<style media="' + q + '"> #mq-test-1 { width: 42px; }</style>';� 18 docElem.insertBefore(fakeBody, refNode);� 19 bool = div.offsetWidth === 42;� 20 docElem.removeChild(fakeBody);� 21 return {� 22 matches: bool,� 23 media: q� 24 };� 25 };� 26 }(w.document);� 27})(this);� 28� 29(function(w) {� 30 "use strict";� 31 var respond = {};� 32 w.respond = respond;� 33 respond.update = function() {};� 34 var requestQueue = [], xmlHttp = function() {� 35 var xmlhttpmethod = false;� 36 try {� 37 xmlhttpmethod = new w.XMLHttpRequest();� 38 } catch (e) {� 39 xmlhttpmethod = new w.ActiveXObject("Microsoft.XMLHTTP");� 40 }� 41 return function() {� 42 return xmlhttpmethod;� 43 };� 44 }(), ajax = function(url, callback) {� 45 var req = xmlHttp();� 46 if (!req) {� 47 return;� 48 }� 49 req.open("GET", url, true);� 50 req.onreadystatechange = function() {� 51 if (req.readyState !== 4 || req.status !== 200 && req.status !== 304) {� 52 return;� 53 }� 54 callback(req.responseText);� 55 };� 56 if (req.readyState === 4) {� 57 return;� 58 }� 59 req.send(null);� 60 }, isUnsupportedMediaQuery = function(query) {� 61 return query.replace(respond.regex.minmaxwh, "").match(respond.regex.other);� 62 };� 63 respond.ajax = ajax;� 64 respond.queue = requestQueue;� 65 respond.unsupportedmq = isUnsupportedMediaQuery;� 66 respond.regex = {� 67 media: /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi,� 68 keyframes: /@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/gi,� 69 comments: /\/\*[^*]*\*+([^/][^*]*\*+)*\//gi,� 70 urls: /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,� 71 findStyles: /@media *([^\{]+)\{([\S\s]+?)$/,� 72 only: /(only\s+)?([a-zA-Z]+)\s?/,� 73 minw: /\(\s*min\-width\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/,� 74 maxw: /\(\s*max\-width\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/,� 75 minmaxwh: /\(\s*m(in|ax)\-(height|width)\s*:\s*(\s*[0-9\.]+)(px|em)\s*\)/gi,� 76 other: /\([^\)]*\)/g� 77 };� 78 respond.mediaQueriesSupported = w.matchMedia && w.matchMedia("only all") !== null && w.matchMedia("only all").matches;� 79 if (respond.mediaQueriesSupported) {� 80 return;� 81 }� 82 var doc = w.document, docElem = doc.documentElement, mediastyles = [], rules = [], appendedEls = [], parsedSheets = {}, resizeThrottle = 30, head = doc.getElementsByTagName("head")[0] || docElem, base = doc.getElementsByTagName("base")[0], links = head.getElementsByTagName("link"), lastCall, resizeDefer, eminpx, getEmValue = function() {� 83 var ret, div = doc.createElement("div"), body = doc.body, originalHTMLFontSize = docElem.style.fontSize, originalBodyFontSize = body && body.style.fontSize, fakeUsed = false;� 84 div.style.cssText = "position:absolute;font-size:1em;width:1em";� 85 if (!body) {� 86 body = fakeUsed = doc.createElement("body");� 87 body.style.background = "none";� 88 }� 89 docElem.style.fontSize = "100%";� 90 body.style.fontSize = "100%";� 91 body.appendChild(div);� 92 if (fakeUsed) {� 93 docElem.insertBefore(body, docElem.firstChild);� 94 }� 95 ret = div.offsetWidth;� 96 if (fakeUsed) {� 97 docElem.removeChild(body);� 98 } else {� 99 body.removeChild(div);� 100 }� 101 docElem.style.fontSize = originalHTMLFontSize;� 102 if (originalBodyFontSize) {� 103 body.style.fontSize = originalBodyFontSize;� 104 }� 105 ret = eminpx = parseFloat(ret);� 106 return ret;� 107 }, applyMedia = function(fromResize) {�
108 var name = "clientWidth", docElemProp = docElem[name], currWidth = doc.compatMode === "CSS1Compat" && docElemProp || doc.body[name] || docElemProp, styleBlocks = {}, lastLink = links[links.length - 1], now = new Date().getTime();� 109 if (fromResize && lastCall && now - lastCall < resizeThrottle) {� 110 w.clearTimeout(resizeDefer);� 111 resizeDefer = w.setTimeout(applyMedia, resizeThrottle);� 112 return;� 113 } else {� 114 lastCall = now;� 115 }� 116 for (var i in mediastyles) {� 117 if (mediastyles.hasOwnProperty(i)) {� 118 var thisstyle = mediastyles[i], min = thisstyle.minw, max = thisstyle.maxw, minnull = min === null, maxnull = max === null, em = "em";� 119 if (!!min) {� 120 min = parseFloat(min) * (min.indexOf(em) > -1 ? eminpx || getEmValue() : 1);� 121 }� 122 if (!!max) {� 123 max = parseFloat(max) * (max.indexOf(em) > -1 ? eminpx || getEmValue() : 1);� 124 }� 125 if (!thisstyle.hasquery || (!minnull || !maxnull) && (minnull || currWidth >= min) && (maxnull || currWidth <= max)) {� 126 if (!styleBlocks[thisstyle.media]) {� 127 styleBlocks[thisstyle.media] = [];� 128 }� 129 styleBlocks[thisstyle.media].push(rules[thisstyle.rules]);� 130 }� 131 }� 132 }� 133 for (var j in appendedEls) {� 134 if (appendedEls.hasOwnProperty(j)) {� 135 if (appendedEls[j] && appendedEls[j].parentNode === head) {� 136 head.removeChild(appendedEls[j]);� 137 }� 138 }� 139 }� 140 appendedEls.length = 0;� 141 for (var k in styleBlocks) {� 142 if (styleBlocks.hasOwnProperty(k)) {� 143 var ss = doc.createElement("style"), css = styleBlocks[k].join("\n");� 144 ss.type = "text/css";� 145 ss.media = k;� 146 head.insertBefore(ss, lastLink.nextSibling);� 147 if (ss.styleSheet) {� 148 ss.styleSheet.cssText = css;� 149 } else {� 150 ss.appendChild(doc.createTextNode(css));� 151 }� 152 appendedEls.push(ss);� 153 }� 154 }� 155 }, translate = function(styles, href, media) {� 156 var qs = styles.replace(respond.regex.comments, "").replace(respond.regex.keyframes, "").match(respond.regex.media), ql = qs && qs.length || 0;� 157 href = href.substring(0, href.lastIndexOf("/"));� 158 var repUrls = function(css) {� 159 return css.replace(respond.regex.urls, "$1" + href + "$2$3");� 160 }, useMedia = !ql && media;� 161 if (href.length) {� 162 href += "/";� 163 }� 164 if (useMedia) {� 165 ql = 1;� 166 }� 167 for (var i = 0; i < ql; i++) {� 168 var fullq, thisq, eachq, eql;� 169 if (useMedia) {� 170 fullq = media;� 171 rules.push(repUrls(styles));� 172 } else {� 173 fullq = qs[i].match(respond.regex.findStyles) && RegExp.$1;� 174 rules.push(RegExp.$2 && repUrls(RegExp.$2));� 175 }� 176 eachq = fullq.split(",");� 177 eql = eachq.length;� 178 for (var j = 0; j < eql; j++) {� 179 thisq = eachq[j];� 180 if (isUnsupportedMediaQuery(thisq)) {� 181 continue;� 182 }� 183 mediastyles.push({� 184 media: thisq.split("(")[0].match(respond.regex.only) && RegExp.$2 || "all",� 185 rules: rules.length - 1,� 186 hasquery: thisq.indexOf("(") > -1,� 187 minw: thisq.match(respond.regex.minw) && parseFloat(RegExp.$1) + (RegExp.$2 || ""),� 188 maxw: thisq.match(respond.regex.maxw) && parseFloat(RegExp.$1) + (RegExp.$2 || "")� 189 });� 190 }� 191 }� 192 applyMedia();� 193 }, makeRequests = function() {� 194 if (requestQueue.length) {� 195 var thisRequest = requestQueue.shift();� 196 ajax(thisRequest.href, function(styles) {� 197 translate(styles, thisRequest.href, thisRequest.media);� 198 parsedSheets[thisRequest.href] = true;� 199 w.setTimeout(function() {� 200 makeRequests();� 201 }, 0);� 202 });� 203 }� 204 }, ripCSS = function() {� 205 for (var i = 0; i < links.length; i++) {� 206 var sheet = links[i], href = sheet.href, media = sheet.media, isCSS = sheet.rel && sheet.rel.toLowerCase() === "stylesheet";� 207 if (!!href && isCSS && !parsedSheets[href]) {� 208 if (sheet.styleSheet && sheet.styleSheet.rawCssText) {� 209 translate(sheet.styleSheet.rawCssText, href, media);� 210 parsedSheets[href] = true;� 211 } else {� 212 if (!/^([a-zA-Z:]*\/\/)/.test(href) && !base || href.replace(RegExp.$1, "").split("/")[0] === w.location.host) {� 213 if (href.substring(0, 2) === "//") {� 214 href = w.location.protocol + href;� 215 }� 216 requestQueue.push({� 217 href: href,� 218 media: media� 219 });� 220 }� 221 }� 222 }� 223 }� 224 makeRequests();� 225 };� 226 ripCSS();� 227 respond.update = ripCSS;� 228 respond.getEmValue = getEmValue;� 229 function callMedia() {� 230 applyMedia(true);� 231 }� 232 if (w.addEventListener) {� 233 w.addEventListener("resize", callMedia, false);� 234 } else if (w.attachEvent) {� 235 w.attachEvent("onresize", callMedia);� 236 }� 237})(this);
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