https://mythainguyen.vn/Scripts/respond.js

1/*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas. Dual MIT/BSD license */
2/*! NOTE: If you're already including a window.matchMedia polyfill via Modernizr or otherwise, you don't need this part */
3(function(w) {
4  "use strict";
5  w.matchMedia = w.matchMedia || function(doc, undefined) {
6    var bool, docElem = doc.documentElement, refNode = docElem.firstElementChild || docElem.firstChild, fakeBody = doc.createElement("body"), div = doc.createElement("div");
7    div.id = "mq-test-1";
8    div.style.cssText = "position:absolute;top:-100em";
9    fakeBody.style.background = "none";
10    fakeBody.appendChild(div);
11    return function(q) {
12      div.innerHTML = '&shy;<style media="' + q + '"> #mq-test-1 { width: 42px; }</style>';
13      docElem.insertBefore(fakeBody, refNode);
14      bool = div.offsetWidth === 42;
15      docElem.removeChild(fakeBody);
16      return {
17        matches: bool,
18        media: q
19      };
20    };
21  }(w.document);
22})(this);
23
24/*! Respond.js v1.4.0: min/max-width media query polyfill. (c) Scott Jehl. MIT Lic. j.mp/respondjs  */
25(function(w) {
26  "use strict";
27  var respond = {};
28  w.respond = respond;
29  respond.update = function() {};
30  var requestQueue = [], xmlHttp = function() {
31    var xmlhttpmethod = false;
32    try {
33      xmlhttpmethod = new w.XMLHttpRequest();
34    } catch (e) {
35      xmlhttpmethod = new w.ActiveXObject("Microsoft.XMLHTTP");
36    }
37    return function() {
38      return xmlhttpmethod;
39    };
40  }(), ajax = function(url, callback) {
41    var req = xmlHttp();
42    if (!req) {
43      return;
44    }
45    req.open("GET", url, true);
46    req.onreadystatechange = function() {
47      if (req.readyState !== 4 || req.status !== 200 && req.status !== 304) {
48        return;
49      }
50      callback(req.responseText);
51    };
52    if (req.readyState === 4) {
53      return;
54    }
55    req.send(null);
56  };
57  respond.ajax = ajax;
58  respond.queue = requestQueue;
59  respond.regex = {
60    media: /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi,
61    keyframes: /@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/gi,
62    urls: /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,
63    findStyles: /@media *([^\{]+)\{([\S\s]+?)$/,
64    only: /(only\s+)?([a-zA-Z]+)\s?/,
65    minw: /\([\s]*min\-width\s*:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/,
66    maxw: /\([\s]*max\-width\s*:[\s]*([\s]*[0-9\.]+)(px|em)[\s]*\)/
67  };
68  respond.mediaQueriesSupported = w.matchMedia && w.matchMedia("only all") !== null && w.matchMedia("only all").matches;
69  if (respond.mediaQueriesSupported) {
70    return;
71  }
72  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() {
73    var ret, div = doc.createElement("div"), body = doc.body, originalHTMLFontSize = docElem.style.fontSize, originalBodyFontSize = body && body.style.fontSize, fakeUsed = false;
74    div.style.cssText = "position:absolute;font-size:1em;width:1em";
75    if (!body) {
76      body = fakeUsed = doc.createElement("body");
77      body.style.background = "none";
78    }
79    docElem.style.fontSize = "100%";
80    body.style.fontSize = "100%";
81    body.appendChild(div);
82    if (fakeUsed) {
83      docElem.insertBefore(body, docElem.firstChild);
84    }
85    ret = div.offsetWidth;
86    if (fakeUsed) {
87      docElem.removeChild(body);
88    } else {
89      body.removeChild(div);
90    }
91    docElem.style.fontSize = originalHTMLFontSize;
92    if (originalBodyFontSize) {
93      body.style.fontSize = originalBodyFontSize;
94    }
95    ret = eminpx = parseFloat(ret);
96    return ret;
97  }, applyMedia = function(fromResize) {
98    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();
99    if (fromResize && lastCall && now - lastCall < resizeThrottle) {
100      w.clearTimeout(resizeDefer);
101      resizeDefer = w.setTimeout(applyMedia, resizeThrottle);
102      return;
103    } else {

104      lastCall = now;
105    }
106    for (var i in mediastyles) {
107      if (mediastyles.hasOwnProperty(i)) {
108        var thisstyle = mediastyles[i], min = thisstyle.minw, max = thisstyle.maxw, minnull = min === null, maxnull = max === null, em = "em";
109        if (!!min) {
110          min = parseFloat(min) * (min.indexOf(em) > -1 ? eminpx || getEmValue() : 1);
111        }
112        if (!!max) {
113          max = parseFloat(max) * (max.indexOf(em) > -1 ? eminpx || getEmValue() : 1);
114        }
115        if (!thisstyle.hasquery || (!minnull || !maxnull) && (minnull || currWidth >= min) && (maxnull || currWidth <= max)) {
116          if (!styleBlocks[thisstyle.media]) {
117            styleBlocks[thisstyle.media] = [];
118          }
119          styleBlocks[thisstyle.media].push(rules[thisstyle.rules]);
120        }
121      }
122    }
123    for (var j in appendedEls) {
124      if (appendedEls.hasOwnProperty(j)) {
125        if (appendedEls[j] && appendedEls[j].parentNode === head) {
126          head.removeChild(appendedEls[j]);
127        }
128      }
129    }
130    appendedEls.length = 0;
131    for (var k in styleBlocks) {
132      if (styleBlocks.hasOwnProperty(k)) {
133        var ss = doc.createElement("style"), css = styleBlocks[k].join("\n");
134        ss.type = "text/css";
135        ss.media = k;
136        head.insertBefore(ss, lastLink.nextSibling);
137        if (ss.styleSheet) {
138          ss.styleSheet.cssText = css;
139        } else {
140          ss.appendChild(doc.createTextNode(css));
141        }
142        appendedEls.push(ss);
143      }
144    }
145  }, translate = function(styles, href, media) {
146    var qs = styles.replace(respond.regex.keyframes, "").match(respond.regex.media), ql = qs && qs.length || 0;
147    href = href.substring(0, href.lastIndexOf("/"));
148    var repUrls = function(css) {
149      return css.replace(respond.regex.urls, "$1" + href + "$2$3");
150    }, useMedia = !ql && media;
151    if (href.length) {
152      href += "/";
153    }
154    if (useMedia) {
155      ql = 1;
156    }
157    for (var i = 0; i < ql; i++) {
158      var fullq, thisq, eachq, eql;
159      if (useMedia) {
160        fullq = media;
161        rules.push(repUrls(styles));
162      } else {
163        fullq = qs[i].match(respond.regex.findStyles) && RegExp.$1;
164        rules.push(RegExp.$2 && repUrls(RegExp.$2));
165      }
166      eachq = fullq.split(",");
167      eql = eachq.length;
168      for (var j = 0; j < eql; j++) {
169        thisq = eachq[j];
170        mediastyles.push({
171          media: thisq.split("(")[0].match(respond.regex.only) && RegExp.$2 || "all",
172          rules: rules.length - 1,
173          hasquery: thisq.indexOf("(") > -1,
174          minw: thisq.match(respond.regex.minw) && parseFloat(RegExp.$1) + (RegExp.$2 || ""),
175          maxw: thisq.match(respond.regex.maxw) && parseFloat(RegExp.$1) + (RegExp.$2 || "")
176        });
177      }
178    }
179    applyMedia();
180  }, makeRequests = function() {
181    if (requestQueue.length) {
182      var thisRequest = requestQueue.shift();
183      ajax(thisRequest.href, function(styles) {
184        translate(styles, thisRequest.href, thisRequest.media);
185        parsedSheets[thisRequest.href] = true;
186        w.setTimeout(function() {
187          makeRequests();
188        }, 0);
189      });
190    }
191  }, ripCSS = function() {
192    for (var i = 0; i < links.length; i++) {
193      var sheet = links[i], href = sheet.href, media = sheet.media, isCSS = sheet.rel && sheet.rel.toLowerCase() === "stylesheet";
194      if (!!href && isCSS && !parsedSheets[href]) {
195        if (sheet.styleSheet && sheet.styleSheet.rawCssText) {
196          translate(sheet.styleSheet.rawCssText, href, media);
197          parsedSheets[href] = true;
198        } else {
199          if (!/^([a-zA-Z:]*\/\/)/.test(href) && !base || href.replace(RegExp.$1, "").split("/")[0] === w.location.host) {
200            if (href.substring(0, 2) === "//") {
201              href = w.location.protocol + href;
202            }
203            requestQueue.push({
204              href: href,
205              media: media
206            });
207          }
208        }
209      }
210    }
211    makeRequests();
212  };
213  ripCSS();
214  respond.update = ripCSS;
215  respond.getEmValue = getEmValue;
216  function callMedia() {
217    applyMedia(true);
218  }
219  if (w.addEventListener) {
220    w.addEventListener("resize", callMedia, false);
221  } else if (w.attachEvent) {
222    w.attachEvent("onresize", callMedia);
223  }
224})(this);