From de98e0b232509d5f40c135d540a70e415272ff85 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Wed, 3 May 2017 15:35:00 +0200
Subject: node_modules

---
 node_modules/html-minifier/src/htmlminifier.js | 1308 ++++++++++++++++++++++++
 node_modules/html-minifier/src/htmlparser.js   |  528 ++++++++++
 node_modules/html-minifier/src/tokenchain.js   |   71 ++
 node_modules/html-minifier/src/utils.js        |   18 +
 4 files changed, 1925 insertions(+)
 create mode 100644 node_modules/html-minifier/src/htmlminifier.js
 create mode 100644 node_modules/html-minifier/src/htmlparser.js
 create mode 100644 node_modules/html-minifier/src/tokenchain.js
 create mode 100644 node_modules/html-minifier/src/utils.js

(limited to 'node_modules/html-minifier/src')

diff --git a/node_modules/html-minifier/src/htmlminifier.js b/node_modules/html-minifier/src/htmlminifier.js
new file mode 100644
index 000000000..f7917cd4a
--- /dev/null
+++ b/node_modules/html-minifier/src/htmlminifier.js
@@ -0,0 +1,1308 @@
+'use strict';
+
+var CleanCSS = require('clean-css');
+var decode = require('he').decode;
+var HTMLParser = require('./htmlparser').HTMLParser;
+var RelateUrl = require('relateurl');
+var TokenChain = require('./tokenchain');
+var UglifyJS = require('uglify-js');
+var utils = require('./utils');
+
+var trimWhitespace = String.prototype.trim ? function(str) {
+  if (typeof str !== 'string') {
+    return str;
+  }
+  return str.trim();
+} : function(str) {
+  if (typeof str !== 'string') {
+    return str;
+  }
+  return str.replace(/^\s+/, '').replace(/\s+$/, '');
+};
+
+function collapseWhitespaceAll(str) {
+  return str && str.replace(/\s+/g, function(spaces) {
+    return spaces === '\t' ? '\t' : spaces.replace(/(^|\xA0+)[^\xA0]+/g, '$1 ');
+  });
+}
+
+function collapseWhitespace(str, options, trimLeft, trimRight, collapseAll) {
+  var lineBreakBefore = '', lineBreakAfter = '';
+
+  if (options.preserveLineBreaks) {
+    str = str.replace(/^\s*?[\n\r]\s*/, function() {
+      lineBreakBefore = '\n';
+      return '';
+    }).replace(/\s*?[\n\r]\s*$/, function() {
+      lineBreakAfter = '\n';
+      return '';
+    });
+  }
+
+  if (trimLeft) {
+    str = str.replace(/^\s+/, function(spaces) {
+      var conservative = !lineBreakBefore && options.conservativeCollapse;
+      if (conservative && spaces === '\t') {
+        return '\t';
+      }
+      return spaces.replace(/^[^\xA0]+/, '').replace(/(\xA0+)[^\xA0]+/g, '$1 ') || (conservative ? ' ' : '');
+    });
+  }
+
+  if (trimRight) {
+    str = str.replace(/\s+$/, function(spaces) {
+      var conservative = !lineBreakAfter && options.conservativeCollapse;
+      if (conservative && spaces === '\t') {
+        return '\t';
+      }
+      return spaces.replace(/[^\xA0]+(\xA0+)/g, ' $1').replace(/[^\xA0]+$/, '') || (conservative ? ' ' : '');
+    });
+  }
+
+  if (collapseAll) {
+    // strip non space whitespace then compress spaces to one
+    str = collapseWhitespaceAll(str);
+  }
+
+  return lineBreakBefore + str + lineBreakAfter;
+}
+
+var createMapFromString = utils.createMapFromString;
+// non-empty tags that will maintain whitespace around them
+var inlineTags = createMapFromString('a,abbr,acronym,b,bdi,bdo,big,button,cite,code,del,dfn,em,font,i,ins,kbd,mark,math,nobr,q,rt,rp,s,samp,small,span,strike,strong,sub,sup,svg,time,tt,u,var');
+// non-empty tags that will maintain whitespace within them
+var inlineTextTags = createMapFromString('a,abbr,acronym,b,big,del,em,font,i,ins,kbd,mark,nobr,s,samp,small,span,strike,strong,sub,sup,time,tt,u,var');
+// self-closing tags that will maintain whitespace around them
+var selfClosingInlineTags = createMapFromString('comment,img,input,wbr');
+
+function collapseWhitespaceSmart(str, prevTag, nextTag, options) {
+  var trimLeft = prevTag && !selfClosingInlineTags(prevTag);
+  if (trimLeft && !options.collapseInlineTagWhitespace) {
+    trimLeft = prevTag.charAt(0) === '/' ? !inlineTags(prevTag.slice(1)) : !inlineTextTags(prevTag);
+  }
+  var trimRight = nextTag && !selfClosingInlineTags(nextTag);
+  if (trimRight && !options.collapseInlineTagWhitespace) {
+    trimRight = nextTag.charAt(0) === '/' ? !inlineTextTags(nextTag.slice(1)) : !inlineTags(nextTag);
+  }
+  return collapseWhitespace(str, options, trimLeft, trimRight, prevTag && nextTag);
+}
+
+function isConditionalComment(text) {
+  return /^\[if\s[^\]]+]|\[endif]$/.test(text);
+}
+
+function isIgnoredComment(text, options) {
+  for (var i = 0, len = options.ignoreCustomComments.length; i < len; i++) {
+    if (options.ignoreCustomComments[i].test(text)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function isEventAttribute(attrName, options) {
+  var patterns = options.customEventAttributes;
+  if (patterns) {
+    for (var i = patterns.length; i--;) {
+      if (patterns[i].test(attrName)) {
+        return true;
+      }
+    }
+    return false;
+  }
+  return /^on[a-z]{3,}$/.test(attrName);
+}
+
+function canRemoveAttributeQuotes(value) {
+  // http://mathiasbynens.be/notes/unquoted-attribute-values
+  return /^[^ \t\n\f\r"'`=<>]+$/.test(value);
+}
+
+function attributesInclude(attributes, attribute) {
+  for (var i = attributes.length; i--;) {
+    if (attributes[i].name.toLowerCase() === attribute) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function isAttributeRedundant(tag, attrName, attrValue, attrs) {
+  attrValue = attrValue ? trimWhitespace(attrValue.toLowerCase()) : '';
+
+  return (
+      tag === 'script' &&
+      attrName === 'language' &&
+      attrValue === 'javascript' ||
+
+      tag === 'form' &&
+      attrName === 'method' &&
+      attrValue === 'get' ||
+
+      tag === 'input' &&
+      attrName === 'type' &&
+      attrValue === 'text' ||
+
+      tag === 'script' &&
+      attrName === 'charset' &&
+      !attributesInclude(attrs, 'src') ||
+
+      tag === 'a' &&
+      attrName === 'name' &&
+      attributesInclude(attrs, 'id') ||
+
+      tag === 'area' &&
+      attrName === 'shape' &&
+      attrValue === 'rect'
+  );
+}
+
+// https://mathiasbynens.be/demo/javascript-mime-type
+// https://developer.mozilla.org/en/docs/Web/HTML/Element/script#attr-type
+var executableScriptsMimetypes = utils.createMap([
+  'text/javascript',
+  'text/ecmascript',
+  'text/jscript',
+  'application/javascript',
+  'application/x-javascript',
+  'application/ecmascript'
+]);
+
+function isScriptTypeAttribute(attrValue) {
+  attrValue = trimWhitespace(attrValue.split(/;/, 2)[0]).toLowerCase();
+  return attrValue === '' || executableScriptsMimetypes(attrValue);
+}
+
+function isExecutableScript(tag, attrs) {
+  if (tag !== 'script') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    var attrName = attrs[i].name.toLowerCase();
+    if (attrName === 'type') {
+      return isScriptTypeAttribute(attrs[i].value);
+    }
+  }
+  return true;
+}
+
+function isStyleLinkTypeAttribute(attrValue) {
+  attrValue = trimWhitespace(attrValue).toLowerCase();
+  return attrValue === '' || attrValue === 'text/css';
+}
+
+function isStyleSheet(tag, attrs) {
+  if (tag !== 'style') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    var attrName = attrs[i].name.toLowerCase();
+    if (attrName === 'type') {
+      return isStyleLinkTypeAttribute(attrs[i].value);
+    }
+  }
+  return true;
+}
+
+var isSimpleBoolean = createMapFromString('allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,default,defaultchecked,defaultmuted,defaultselected,defer,disabled,enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,required,reversed,scoped,seamless,selected,sortable,truespeed,typemustmatch,visible');
+var isBooleanValue = createMapFromString('true,false');
+
+function isBooleanAttribute(attrName, attrValue) {
+  return isSimpleBoolean(attrName) || attrName === 'draggable' && !isBooleanValue(attrValue);
+}
+
+function isUriTypeAttribute(attrName, tag) {
+  return (
+    /^(?:a|area|link|base)$/.test(tag) && attrName === 'href' ||
+    tag === 'img' && /^(?:src|longdesc|usemap)$/.test(attrName) ||
+    tag === 'object' && /^(?:classid|codebase|data|usemap)$/.test(attrName) ||
+    tag === 'q' && attrName === 'cite' ||
+    tag === 'blockquote' && attrName === 'cite' ||
+    (tag === 'ins' || tag === 'del') && attrName === 'cite' ||
+    tag === 'form' && attrName === 'action' ||
+    tag === 'input' && (attrName === 'src' || attrName === 'usemap') ||
+    tag === 'head' && attrName === 'profile' ||
+    tag === 'script' && (attrName === 'src' || attrName === 'for')
+  );
+}
+
+function isNumberTypeAttribute(attrName, tag) {
+  return (
+    /^(?:a|area|object|button)$/.test(tag) && attrName === 'tabindex' ||
+    tag === 'input' && (attrName === 'maxlength' || attrName === 'tabindex') ||
+    tag === 'select' && (attrName === 'size' || attrName === 'tabindex') ||
+    tag === 'textarea' && /^(?:rows|cols|tabindex)$/.test(attrName) ||
+    tag === 'colgroup' && attrName === 'span' ||
+    tag === 'col' && attrName === 'span' ||
+    (tag === 'th' || tag === 'td') && (attrName === 'rowspan' || attrName === 'colspan')
+  );
+}
+
+function isLinkType(tag, attrs, value) {
+  if (tag !== 'link') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    if (attrs[i].name === 'rel' && attrs[i].value === value) {
+      return true;
+    }
+  }
+}
+
+function isMediaQuery(tag, attrs, attrName) {
+  return attrName === 'media' && (isLinkType(tag, attrs, 'stylesheet') || isStyleSheet(tag, attrs));
+}
+
+var srcsetTags = createMapFromString('img,source');
+
+function isSrcset(attrName, tag) {
+  return attrName === 'srcset' && srcsetTags(tag);
+}
+
+function cleanAttributeValue(tag, attrName, attrValue, options, attrs) {
+  if (attrValue && isEventAttribute(attrName, options)) {
+    attrValue = trimWhitespace(attrValue).replace(/^javascript:\s*/i, '');
+    return options.minifyJS(attrValue, true);
+  }
+  else if (attrName === 'class') {
+    attrValue = trimWhitespace(attrValue);
+    if (options.sortClassName) {
+      attrValue = options.sortClassName(attrValue);
+    }
+    else {
+      attrValue = collapseWhitespaceAll(attrValue);
+    }
+    return attrValue;
+  }
+  else if (isUriTypeAttribute(attrName, tag)) {
+    attrValue = trimWhitespace(attrValue);
+    return isLinkType(tag, attrs, 'canonical') ? attrValue : options.minifyURLs(attrValue);
+  }
+  else if (isNumberTypeAttribute(attrName, tag)) {
+    return trimWhitespace(attrValue);
+  }
+  else if (attrName === 'style') {
+    attrValue = trimWhitespace(attrValue);
+    if (attrValue) {
+      if (/;$/.test(attrValue) && !/&#?[0-9a-zA-Z]+;$/.test(attrValue)) {
+        attrValue = attrValue.replace(/\s*;$/, '');
+      }
+      attrValue = unwrapInlineCSS(options.minifyCSS(wrapInlineCSS(attrValue)));
+    }
+    return attrValue;
+  }
+  else if (isSrcset(attrName, tag)) {
+    // https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-srcset
+    attrValue = trimWhitespace(attrValue).split(/\s+,\s*|\s*,\s+/).map(function(candidate) {
+      var url = candidate;
+      var descriptor = '';
+      var match = candidate.match(/\s+([1-9][0-9]*w|[0-9]+(?:\.[0-9]+)?x)$/);
+      if (match) {
+        url = url.slice(0, -match[0].length);
+        var num = +match[1].slice(0, -1);
+        var suffix = match[1].slice(-1);
+        if (num !== 1 || suffix !== 'x') {
+          descriptor = ' ' + num + suffix;
+        }
+      }
+      return options.minifyURLs(url) + descriptor;
+    }).join(', ');
+  }
+  else if (isMetaViewport(tag, attrs) && attrName === 'content') {
+    attrValue = attrValue.replace(/\s+/g, '').replace(/[0-9]+\.[0-9]+/g, function(numString) {
+      // "0.90000" -> "0.9"
+      // "1.0" -> "1"
+      // "1.0001" -> "1.0001" (unchanged)
+      return (+numString).toString();
+    });
+  }
+  else if (attrValue && options.customAttrCollapse && options.customAttrCollapse.test(attrName)) {
+    attrValue = attrValue.replace(/\n+|\r+|\s{2,}/g, '');
+  }
+  else if (tag === 'script' && attrName === 'type') {
+    attrValue = trimWhitespace(attrValue.replace(/\s*;\s*/g, ';'));
+  }
+  else if (isMediaQuery(tag, attrs, attrName)) {
+    attrValue = trimWhitespace(attrValue);
+    return unwrapMediaQuery(options.minifyCSS(wrapMediaQuery(attrValue)));
+  }
+  return attrValue;
+}
+
+function isMetaViewport(tag, attrs) {
+  if (tag !== 'meta') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    if (attrs[i].name === 'name' && attrs[i].value === 'viewport') {
+      return true;
+    }
+  }
+}
+
+// Wrap CSS declarations for CleanCSS > 3.x
+// See https://github.com/jakubpawlowicz/clean-css/issues/418
+function wrapInlineCSS(text) {
+  return '*{' + text + '}';
+}
+
+function unwrapInlineCSS(text) {
+  var matches = text.match(/^\*\{([\s\S]*)\}$/);
+  return matches ? matches[1] : text;
+}
+
+function wrapMediaQuery(text) {
+  return '@media ' + text + '{a{top:0}}';
+}
+
+function unwrapMediaQuery(text) {
+  var matches = text.match(/^@media ([\s\S]*?)\s*{[\s\S]*}$/);
+  return matches ? matches[1] : text;
+}
+
+function cleanConditionalComment(comment, options) {
+  return options.processConditionalComments ? comment.replace(/^(\[if\s[^\]]+]>)([\s\S]*?)(<!\[endif])$/, function(match, prefix, text, suffix) {
+    return prefix + minify(text, options, true) + suffix;
+  }) : comment;
+}
+
+function processScript(text, options, currentAttrs) {
+  for (var i = 0, len = currentAttrs.length; i < len; i++) {
+    if (currentAttrs[i].name.toLowerCase() === 'type' &&
+        options.processScripts.indexOf(currentAttrs[i].value) > -1) {
+      return minify(text, options);
+    }
+  }
+  return text;
+}
+
+// Tag omission rules from https://html.spec.whatwg.org/multipage/syntax.html#optional-tags
+// with the following deviations:
+// - retain <body> if followed by <noscript>
+// - </rb>, </rt>, </rtc>, </rp> & </tfoot> follow http://www.w3.org/TR/html5/syntax.html#optional-tags
+// - retain all tags which are adjacent to non-standard HTML tags
+var optionalStartTags = createMapFromString('html,head,body,colgroup,tbody');
+var optionalEndTags = createMapFromString('html,head,body,li,dt,dd,p,rb,rt,rtc,rp,optgroup,option,colgroup,caption,thead,tbody,tfoot,tr,td,th');
+var headerTags = createMapFromString('meta,link,script,style,template,noscript');
+var descriptionTags = createMapFromString('dt,dd');
+var pBlockTags = createMapFromString('address,article,aside,blockquote,details,div,dl,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,hr,main,menu,nav,ol,p,pre,section,table,ul');
+var pInlineTags = createMapFromString('a,audio,del,ins,map,noscript,video');
+var rubyTags = createMapFromString('rb,rt,rtc,rp');
+var rtcTag = createMapFromString('rb,rtc,rp');
+var optionTag = createMapFromString('option,optgroup');
+var tableContentTags = createMapFromString('tbody,tfoot');
+var tableSectionTags = createMapFromString('thead,tbody,tfoot');
+var cellTags = createMapFromString('td,th');
+var topLevelTags = createMapFromString('html,head,body');
+var compactTags = createMapFromString('html,body');
+var looseTags = createMapFromString('head,colgroup,caption');
+var trailingTags = createMapFromString('dt,thead');
+var htmlTags = createMapFromString('a,abbr,acronym,address,applet,area,article,aside,audio,b,base,basefont,bdi,bdo,bgsound,big,blink,blockquote,body,br,button,canvas,caption,center,cite,code,col,colgroup,command,content,data,datalist,dd,del,details,dfn,dialog,dir,div,dl,dt,element,em,embed,fieldset,figcaption,figure,font,footer,form,frame,frameset,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,i,iframe,image,img,input,ins,isindex,kbd,keygen,label,legend,li,link,listing,main,map,mark,marquee,menu,menuitem,meta,meter,multicol,nav,nobr,noembed,noframes,noscript,object,ol,optgroup,option,output,p,param,picture,plaintext,pre,progress,q,rp,rt,rtc,ruby,s,samp,script,section,select,shadow,small,source,spacer,span,strike,strong,style,sub,summary,sup,table,tbody,td,template,textarea,tfoot,th,thead,time,title,tr,track,tt,u,ul,var,video,wbr,xmp');
+
+function canRemoveParentTag(optionalStartTag, tag) {
+  switch (optionalStartTag) {
+    case 'html':
+    case 'head':
+      return true;
+    case 'body':
+      return !headerTags(tag);
+    case 'colgroup':
+      return tag === 'col';
+    case 'tbody':
+      return tag === 'tr';
+  }
+  return false;
+}
+
+function isStartTagMandatory(optionalEndTag, tag) {
+  switch (tag) {
+    case 'colgroup':
+      return optionalEndTag === 'colgroup';
+    case 'tbody':
+      return tableSectionTags(optionalEndTag);
+  }
+  return false;
+}
+
+function canRemovePrecedingTag(optionalEndTag, tag) {
+  switch (optionalEndTag) {
+    case 'html':
+    case 'head':
+    case 'body':
+    case 'colgroup':
+    case 'caption':
+      return true;
+    case 'li':
+    case 'optgroup':
+    case 'tr':
+      return tag === optionalEndTag;
+    case 'dt':
+    case 'dd':
+      return descriptionTags(tag);
+    case 'p':
+      return pBlockTags(tag);
+    case 'rb':
+    case 'rt':
+    case 'rp':
+      return rubyTags(tag);
+    case 'rtc':
+      return rtcTag(tag);
+    case 'option':
+      return optionTag(tag);
+    case 'thead':
+    case 'tbody':
+      return tableContentTags(tag);
+    case 'tfoot':
+      return tag === 'tbody';
+    case 'td':
+    case 'th':
+      return cellTags(tag);
+  }
+  return false;
+}
+
+var reEmptyAttribute = new RegExp(
+  '^(?:class|id|style|title|lang|dir|on(?:focus|blur|change|click|dblclick|mouse(' +
+    '?:down|up|over|move|out)|key(?:press|down|up)))$');
+
+function canDeleteEmptyAttribute(tag, attrName, attrValue, options) {
+  var isValueEmpty = !attrValue || /^\s*$/.test(attrValue);
+  if (!isValueEmpty) {
+    return false;
+  }
+  if (typeof options.removeEmptyAttributes === 'function') {
+    return options.removeEmptyAttributes(attrName, tag);
+  }
+  return tag === 'input' && attrName === 'value' || reEmptyAttribute.test(attrName);
+}
+
+function hasAttrName(name, attrs) {
+  for (var i = attrs.length - 1; i >= 0; i--) {
+    if (attrs[i].name === name) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function canRemoveElement(tag, attrs) {
+  switch (tag) {
+    case 'textarea':
+      return false;
+    case 'audio':
+    case 'script':
+    case 'video':
+      if (hasAttrName('src', attrs)) {
+        return false;
+      }
+      break;
+    case 'iframe':
+      if (hasAttrName('src', attrs) || hasAttrName('srcdoc', attrs)) {
+        return false;
+      }
+      break;
+    case 'object':
+      if (hasAttrName('data', attrs)) {
+        return false;
+      }
+      break;
+    case 'applet':
+      if (hasAttrName('code', attrs)) {
+        return false;
+      }
+      break;
+  }
+  return true;
+}
+
+function canCollapseWhitespace(tag) {
+  return !/^(?:script|style|pre|textarea)$/.test(tag);
+}
+
+function canTrimWhitespace(tag) {
+  return !/^(?:pre|textarea)$/.test(tag);
+}
+
+function normalizeAttr(attr, attrs, tag, options) {
+  var attrName = options.caseSensitive ? attr.name : attr.name.toLowerCase(),
+      attrValue = attr.value;
+
+  if (options.decodeEntities && attrValue) {
+    attrValue = decode(attrValue, { isAttributeValue: true });
+  }
+
+  if (options.removeRedundantAttributes &&
+    isAttributeRedundant(tag, attrName, attrValue, attrs) ||
+    options.removeScriptTypeAttributes && tag === 'script' &&
+    attrName === 'type' && isScriptTypeAttribute(attrValue) ||
+    options.removeStyleLinkTypeAttributes && (tag === 'style' || tag === 'link') &&
+    attrName === 'type' && isStyleLinkTypeAttribute(attrValue)) {
+    return;
+  }
+
+  attrValue = cleanAttributeValue(tag, attrName, attrValue, options, attrs);
+
+  if (options.removeEmptyAttributes &&
+      canDeleteEmptyAttribute(tag, attrName, attrValue, options)) {
+    return;
+  }
+
+  if (options.decodeEntities && attrValue) {
+    attrValue = attrValue.replace(/&(#?[0-9a-zA-Z]+;)/g, '&amp;$1');
+  }
+
+  return {
+    attr: attr,
+    name: attrName,
+    value: attrValue
+  };
+}
+
+function buildAttr(normalized, hasUnarySlash, options, isLast, uidAttr) {
+  var attrName = normalized.name,
+      attrValue = normalized.value,
+      attr = normalized.attr,
+      attrQuote = attr.quote,
+      attrFragment,
+      emittedAttrValue;
+
+  if (typeof attrValue !== 'undefined' && (!options.removeAttributeQuotes ||
+      ~attrValue.indexOf(uidAttr) || !canRemoveAttributeQuotes(attrValue))) {
+    if (!options.preventAttributesEscaping) {
+      if (typeof options.quoteCharacter === 'undefined') {
+        var apos = (attrValue.match(/'/g) || []).length;
+        var quot = (attrValue.match(/"/g) || []).length;
+        attrQuote = apos < quot ? '\'' : '"';
+      }
+      else {
+        attrQuote = options.quoteCharacter === '\'' ? '\'' : '"';
+      }
+      if (attrQuote === '"') {
+        attrValue = attrValue.replace(/"/g, '&#34;');
+      }
+      else {
+        attrValue = attrValue.replace(/'/g, '&#39;');
+      }
+    }
+    emittedAttrValue = attrQuote + attrValue + attrQuote;
+    if (!isLast && !options.removeTagWhitespace) {
+      emittedAttrValue += ' ';
+    }
+  }
+  // make sure trailing slash is not interpreted as HTML self-closing tag
+  else if (isLast && !hasUnarySlash && !/\/$/.test(attrValue)) {
+    emittedAttrValue = attrValue;
+  }
+  else {
+    emittedAttrValue = attrValue + ' ';
+  }
+
+  if (typeof attrValue === 'undefined' || options.collapseBooleanAttributes &&
+      isBooleanAttribute(attrName.toLowerCase(), attrValue.toLowerCase())) {
+    attrFragment = attrName;
+    if (!isLast) {
+      attrFragment += ' ';
+    }
+  }
+  else {
+    attrFragment = attrName + attr.customAssign + emittedAttrValue;
+  }
+
+  return attr.customOpen + attrFragment + attr.customClose;
+}
+
+function identity(value) {
+  return value;
+}
+
+function processOptions(options) {
+  ['html5', 'includeAutoGeneratedTags'].forEach(function(key) {
+    if (!(key in options)) {
+      options[key] = true;
+    }
+  });
+
+  if (typeof options.log !== 'function') {
+    options.log = identity;
+  }
+
+  var defaultTesters = ['canCollapseWhitespace', 'canTrimWhitespace'];
+  for (var i = 0, len = defaultTesters.length; i < len; i++) {
+    if (!options[defaultTesters[i]]) {
+      options[defaultTesters[i]] = function() {
+        return false;
+      };
+    }
+  }
+
+  if (!('ignoreCustomComments' in options)) {
+    options.ignoreCustomComments = [/^!/];
+  }
+
+  if (!('ignoreCustomFragments' in options)) {
+    options.ignoreCustomFragments = [
+      /<%[\s\S]*?%>/,
+      /<\?[\s\S]*?\?>/
+    ];
+  }
+
+  if (!options.minifyURLs) {
+    options.minifyURLs = identity;
+  }
+  if (typeof options.minifyURLs !== 'function') {
+    var minifyURLs = options.minifyURLs;
+    if (typeof minifyURLs === 'string') {
+      minifyURLs = { site: minifyURLs };
+    }
+    else if (typeof minifyURLs !== 'object') {
+      minifyURLs = {};
+    }
+    options.minifyURLs = function(text) {
+      try {
+        return RelateUrl.relate(text, minifyURLs);
+      }
+      catch (err) {
+        options.log(err);
+        return text;
+      }
+    };
+  }
+
+  if (!options.minifyJS) {
+    options.minifyJS = identity;
+  }
+  if (typeof options.minifyJS !== 'function') {
+    var minifyJS = options.minifyJS;
+    if (typeof minifyJS !== 'object') {
+      minifyJS = {};
+    }
+    minifyJS.fromString = true;
+    (minifyJS.parse || (minifyJS.parse = {})).bare_returns = false;
+    options.minifyJS = function(text, inline) {
+      var start = text.match(/^\s*<!--.*/);
+      var code = start ? text.slice(start[0].length).replace(/\n\s*-->\s*$/, '') : text;
+      try {
+        minifyJS.parse.bare_returns = inline;
+        code = UglifyJS.minify(code, minifyJS).code;
+        if (/;$/.test(code)) {
+          code = code.slice(0, -1);
+        }
+        return code;
+      }
+      catch (err) {
+        options.log(err);
+        return text;
+      }
+    };
+  }
+
+  if (!options.minifyCSS) {
+    options.minifyCSS = identity;
+  }
+  if (typeof options.minifyCSS !== 'function') {
+    var minifyCSS = options.minifyCSS;
+    if (typeof minifyCSS !== 'object') {
+      minifyCSS = {};
+    }
+    options.minifyCSS = function(text) {
+      text = text.replace(/(url\s*\(\s*)("|'|)(.*?)\2(\s*\))/ig, function(match, prefix, quote, url, suffix) {
+        return prefix + quote + options.minifyURLs(url) + quote + suffix;
+      });
+      try {
+        return new CleanCSS(minifyCSS).minify(text).styles;
+      }
+      catch (err) {
+        options.log(err);
+        return text;
+      }
+    };
+  }
+}
+
+function uniqueId(value) {
+  var id;
+  do {
+    id = Math.random().toString(36).replace(/^0\.[0-9]*/, '');
+  } while (~value.indexOf(id));
+  return id;
+}
+
+var specialContentTags = createMapFromString('script,style');
+
+function createSortFns(value, options, uidIgnore, uidAttr) {
+  var attrChains = options.sortAttributes && Object.create(null);
+  var classChain = options.sortClassName && new TokenChain();
+
+  function attrNames(attrs) {
+    return attrs.map(function(attr) {
+      return options.caseSensitive ? attr.name : attr.name.toLowerCase();
+    });
+  }
+
+  function shouldSkipUID(token, uid) {
+    return !uid || token.indexOf(uid) === -1;
+  }
+
+  function shouldSkipUIDs(token) {
+    return shouldSkipUID(token, uidIgnore) && shouldSkipUID(token, uidAttr);
+  }
+
+  function scan(input) {
+    var currentTag, currentType;
+    new HTMLParser(input, {
+      start: function(tag, attrs) {
+        if (attrChains) {
+          if (!attrChains[tag]) {
+            attrChains[tag] = new TokenChain();
+          }
+          attrChains[tag].add(attrNames(attrs).filter(shouldSkipUIDs));
+        }
+        for (var i = 0, len = attrs.length; i < len; i++) {
+          var attr = attrs[i];
+          if (classChain && (options.caseSensitive ? attr.name : attr.name.toLowerCase()) === 'class') {
+            classChain.add(trimWhitespace(attr.value).split(/\s+/).filter(shouldSkipUIDs));
+          }
+          else if (options.processScripts && attr.name.toLowerCase() === 'type') {
+            currentTag = tag;
+            currentType = attr.value;
+          }
+        }
+      },
+      end: function() {
+        currentTag = '';
+      },
+      chars: function(text) {
+        if (options.processScripts && specialContentTags(currentTag) &&
+            options.processScripts.indexOf(currentType) > -1) {
+          scan(text);
+        }
+      }
+    });
+  }
+
+  var log = options.log;
+  options.log = null;
+  options.sortAttributes = false;
+  options.sortClassName = false;
+  scan(minify(value, options));
+  options.log = log;
+  if (attrChains) {
+    var attrSorters = Object.create(null);
+    for (var tag in attrChains) {
+      attrSorters[tag] = attrChains[tag].createSorter();
+    }
+    options.sortAttributes = function(tag, attrs) {
+      var sorter = attrSorters[tag];
+      if (sorter) {
+        var attrMap = Object.create(null);
+        var names = attrNames(attrs);
+        names.forEach(function(name, index) {
+          (attrMap[name] || (attrMap[name] = [])).push(attrs[index]);
+        });
+        sorter.sort(names).forEach(function(name, index) {
+          attrs[index] = attrMap[name].shift();
+        });
+      }
+    };
+  }
+  if (classChain) {
+    var sorter = classChain.createSorter();
+    options.sortClassName = function(value) {
+      return sorter.sort(value.split(/\s+/)).join(' ');
+    };
+  }
+}
+
+function minify(value, options, partialMarkup) {
+  options = options || {};
+  var optionsStack = [];
+  processOptions(options);
+  if (options.collapseWhitespace) {
+    value = collapseWhitespace(value, options, true, true);
+  }
+
+  var buffer = [],
+      charsPrevTag,
+      currentChars = '',
+      hasChars,
+      currentTag = '',
+      currentAttrs = [],
+      stackNoTrimWhitespace = [],
+      stackNoCollapseWhitespace = [],
+      optionalStartTag = '',
+      optionalEndTag = '',
+      t = Date.now(),
+      ignoredMarkupChunks = [],
+      ignoredCustomMarkupChunks = [],
+      uidIgnore,
+      uidAttr,
+      uidPattern;
+
+  // temporarily replace ignored chunks with comments,
+  // so that we don't have to worry what's there.
+  // for all we care there might be
+  // completely-horribly-broken-alien-non-html-emoj-cthulhu-filled content
+  value = value.replace(/<!-- htmlmin:ignore -->([\s\S]*?)<!-- htmlmin:ignore -->/g, function(match, group1) {
+    if (!uidIgnore) {
+      uidIgnore = uniqueId(value);
+      var pattern = new RegExp('^' + uidIgnore + '([0-9]+)$');
+      if (options.ignoreCustomComments) {
+        options.ignoreCustomComments.push(pattern);
+      }
+      else {
+        options.ignoreCustomComments = [pattern];
+      }
+    }
+    var token = '<!--' + uidIgnore + ignoredMarkupChunks.length + '-->';
+    ignoredMarkupChunks.push(group1);
+    return token;
+  });
+
+  function escapeFragments(text) {
+    return text.replace(uidPattern, function(match, prefix, index) {
+      var chunks = ignoredCustomMarkupChunks[+index];
+      return chunks[1] + uidAttr + index + chunks[2];
+    });
+  }
+
+  var customFragments = options.ignoreCustomFragments.map(function(re) {
+    return re.source;
+  });
+  if (customFragments.length) {
+    var reCustomIgnore = new RegExp('\\s*(?:' + customFragments.join('|') + ')+\\s*', 'g');
+    // temporarily replace custom ignored fragments with unique attributes
+    value = value.replace(reCustomIgnore, function(match) {
+      if (!uidAttr) {
+        uidAttr = uniqueId(value);
+        uidPattern = new RegExp('(\\s*)' + uidAttr + '([0-9]+)(\\s*)', 'g');
+        var minifyCSS = options.minifyCSS;
+        if (minifyCSS) {
+          options.minifyCSS = function(text) {
+            return minifyCSS(escapeFragments(text));
+          };
+        }
+        var minifyJS = options.minifyJS;
+        if (minifyJS) {
+          options.minifyJS = function(text, inline) {
+            return minifyJS(escapeFragments(text), inline);
+          };
+        }
+      }
+      var token = uidAttr + ignoredCustomMarkupChunks.length;
+      ignoredCustomMarkupChunks.push(/^(\s*)[\s\S]*?(\s*)$/.exec(match));
+      return '\t' + token + '\t';
+    });
+  }
+
+  if (options.sortAttributes && typeof options.sortAttributes !== 'function' ||
+      options.sortClassName && typeof options.sortClassName !== 'function') {
+    createSortFns(value, options, uidIgnore, uidAttr);
+  }
+
+  function _canCollapseWhitespace(tag, attrs) {
+    return canCollapseWhitespace(tag) || options.canCollapseWhitespace(tag, attrs);
+  }
+
+  function _canTrimWhitespace(tag, attrs) {
+    return canTrimWhitespace(tag) || options.canTrimWhitespace(tag, attrs);
+  }
+
+  function removeStartTag() {
+    var index = buffer.length - 1;
+    while (index > 0 && !/^<[^/!]/.test(buffer[index])) {
+      index--;
+    }
+    buffer.length = Math.max(0, index);
+  }
+
+  function removeEndTag() {
+    var index = buffer.length - 1;
+    while (index > 0 && !/^<\//.test(buffer[index])) {
+      index--;
+    }
+    buffer.length = Math.max(0, index);
+  }
+
+  // look for trailing whitespaces, bypass any inline tags
+  function trimTrailingWhitespace(index, nextTag) {
+    for (var endTag = null; index >= 0 && _canTrimWhitespace(endTag); index--) {
+      var str = buffer[index];
+      var match = str.match(/^<\/([\w:-]+)>$/);
+      if (match) {
+        endTag = match[1];
+      }
+      else if (/>$/.test(str) || (buffer[index] = collapseWhitespaceSmart(str, null, nextTag, options))) {
+        break;
+      }
+    }
+  }
+
+  // look for trailing whitespaces from previously processed text
+  // which may not be trimmed due to a following comment or an empty
+  // element which has now been removed
+  function squashTrailingWhitespace(nextTag) {
+    var charsIndex = buffer.length - 1;
+    if (buffer.length > 1) {
+      var item = buffer[buffer.length - 1];
+      if (/^(?:<!|$)/.test(item) && item.indexOf(uidIgnore) === -1) {
+        charsIndex--;
+      }
+    }
+    trimTrailingWhitespace(charsIndex, nextTag);
+  }
+
+  new HTMLParser(value, {
+    partialMarkup: partialMarkup,
+    html5: options.html5,
+
+    start: function(tag, attrs, unary, unarySlash, autoGenerated) {
+      var lowerTag = tag.toLowerCase();
+
+      if (lowerTag === 'svg') {
+        optionsStack.push(options);
+        var nextOptions = {};
+        for (var key in options) {
+          nextOptions[key] = options[key];
+        }
+        nextOptions.keepClosingSlash = true;
+        nextOptions.caseSensitive = true;
+        options = nextOptions;
+      }
+
+      tag = options.caseSensitive ? tag : lowerTag;
+
+      currentTag = tag;
+      charsPrevTag = tag;
+      if (!inlineTextTags(tag)) {
+        currentChars = '';
+      }
+      hasChars = false;
+      currentAttrs = attrs;
+
+      var optional = options.removeOptionalTags;
+      if (optional) {
+        var htmlTag = htmlTags(tag);
+        // <html> may be omitted if first thing inside is not comment
+        // <head> may be omitted if first thing inside is an element
+        // <body> may be omitted if first thing inside is not space, comment, <meta>, <link>, <script>, <style> or <template>
+        // <colgroup> may be omitted if first thing inside is <col>
+        // <tbody> may be omitted if first thing inside is <tr>
+        if (htmlTag && canRemoveParentTag(optionalStartTag, tag)) {
+          removeStartTag();
+        }
+        optionalStartTag = '';
+        // end-tag-followed-by-start-tag omission rules
+        if (htmlTag && canRemovePrecedingTag(optionalEndTag, tag)) {
+          removeEndTag();
+          // <colgroup> cannot be omitted if preceding </colgroup> is omitted
+          // <tbody> cannot be omitted if preceding </tbody>, </thead> or </tfoot> is omitted
+          optional = !isStartTagMandatory(optionalEndTag, tag);
+        }
+        optionalEndTag = '';
+      }
+
+      // set whitespace flags for nested tags (eg. <code> within a <pre>)
+      if (options.collapseWhitespace) {
+        if (!stackNoTrimWhitespace.length) {
+          squashTrailingWhitespace(tag);
+        }
+        if (!_canTrimWhitespace(tag, attrs)) {
+          stackNoTrimWhitespace.push(tag);
+        }
+        if (!_canCollapseWhitespace(tag, attrs)) {
+          stackNoCollapseWhitespace.push(tag);
+        }
+      }
+
+      var openTag = '<' + tag;
+      var hasUnarySlash = unarySlash && options.keepClosingSlash;
+
+      buffer.push(openTag);
+
+      if (options.sortAttributes) {
+        options.sortAttributes(tag, attrs);
+      }
+
+      var parts = [];
+      for (var i = attrs.length, isLast = true; --i >= 0;) {
+        var normalized = normalizeAttr(attrs[i], attrs, tag, options);
+        if (normalized) {
+          parts.unshift(buildAttr(normalized, hasUnarySlash, options, isLast, uidAttr));
+          isLast = false;
+        }
+      }
+      if (parts.length > 0) {
+        buffer.push(' ');
+        buffer.push.apply(buffer, parts);
+      }
+      // start tag must never be omitted if it has any attributes
+      else if (optional && optionalStartTags(tag)) {
+        optionalStartTag = tag;
+      }
+
+      buffer.push(buffer.pop() + (hasUnarySlash ? '/' : '') + '>');
+
+      if (autoGenerated && !options.includeAutoGeneratedTags) {
+        removeStartTag();
+        optionalStartTag = '';
+      }
+    },
+    end: function(tag, attrs, autoGenerated) {
+      var lowerTag = tag.toLowerCase();
+      if (lowerTag === 'svg') {
+        options = optionsStack.pop();
+      }
+      tag = options.caseSensitive ? tag : lowerTag;
+
+      // check if current tag is in a whitespace stack
+      if (options.collapseWhitespace) {
+        if (stackNoTrimWhitespace.length) {
+          if (tag === stackNoTrimWhitespace[stackNoTrimWhitespace.length - 1]) {
+            stackNoTrimWhitespace.pop();
+          }
+        }
+        else {
+          squashTrailingWhitespace('/' + tag);
+        }
+        if (stackNoCollapseWhitespace.length &&
+          tag === stackNoCollapseWhitespace[stackNoCollapseWhitespace.length - 1]) {
+          stackNoCollapseWhitespace.pop();
+        }
+      }
+
+      var isElementEmpty = false;
+      if (tag === currentTag) {
+        currentTag = '';
+        isElementEmpty = !hasChars;
+      }
+
+      if (options.removeOptionalTags) {
+        // <html>, <head> or <body> may be omitted if the element is empty
+        if (isElementEmpty && topLevelTags(optionalStartTag)) {
+          removeStartTag();
+        }
+        optionalStartTag = '';
+        // </html> or </body> may be omitted if not followed by comment
+        // </head> may be omitted if not followed by space or comment
+        // </p> may be omitted if no more content in non-</a> parent
+        // except for </dt> or </thead>, end tags may be omitted if no more content in parent element
+        if (htmlTags(tag) && optionalEndTag && !trailingTags(optionalEndTag) && (optionalEndTag !== 'p' || !pInlineTags(tag))) {
+          removeEndTag();
+        }
+        optionalEndTag = optionalEndTags(tag) ? tag : '';
+      }
+
+      if (options.removeEmptyElements && isElementEmpty && canRemoveElement(tag, attrs)) {
+        // remove last "element" from buffer
+        removeStartTag();
+        optionalStartTag = '';
+        optionalEndTag = '';
+      }
+      else {
+        if (autoGenerated && !options.includeAutoGeneratedTags) {
+          optionalEndTag = '';
+        }
+        else {
+          buffer.push('</' + tag + '>');
+        }
+        charsPrevTag = '/' + tag;
+        if (!inlineTags(tag)) {
+          currentChars = '';
+        }
+        else if (isElementEmpty) {
+          currentChars += '|';
+        }
+      }
+    },
+    chars: function(text, prevTag, nextTag) {
+      prevTag = prevTag === '' ? 'comment' : prevTag;
+      nextTag = nextTag === '' ? 'comment' : nextTag;
+      if (options.decodeEntities && text && !specialContentTags(currentTag)) {
+        text = decode(text);
+      }
+      if (options.collapseWhitespace) {
+        if (!stackNoTrimWhitespace.length) {
+          if (prevTag === 'comment') {
+            var prevComment = buffer[buffer.length - 1];
+            if (prevComment.indexOf(uidIgnore) === -1) {
+              if (!prevComment) {
+                prevTag = charsPrevTag;
+              }
+              if (buffer.length > 1 && (!prevComment || !options.conservativeCollapse && / $/.test(currentChars))) {
+                var charsIndex = buffer.length - 2;
+                buffer[charsIndex] = buffer[charsIndex].replace(/\s+$/, function(trailingSpaces) {
+                  text = trailingSpaces + text;
+                  return '';
+                });
+              }
+            }
+          }
+          if (prevTag) {
+            if (prevTag === '/nobr' || prevTag === 'wbr') {
+              if (/^\s/.test(text)) {
+                var tagIndex = buffer.length - 1;
+                while (tagIndex > 0 && buffer[tagIndex].lastIndexOf('<' + prevTag) !== 0) {
+                  tagIndex--;
+                }
+                trimTrailingWhitespace(tagIndex - 1, 'br');
+              }
+            }
+            else if (inlineTextTags(prevTag.charAt(0) === '/' ? prevTag.slice(1) : prevTag)) {
+              text = collapseWhitespace(text, options, /(?:^|\s)$/.test(currentChars));
+            }
+          }
+          if (prevTag || nextTag) {
+            text = collapseWhitespaceSmart(text, prevTag, nextTag, options);
+          }
+          else {
+            text = collapseWhitespace(text, options, true, true);
+          }
+          if (!text && /\s$/.test(currentChars) && prevTag && prevTag.charAt(0) === '/') {
+            trimTrailingWhitespace(buffer.length - 1, nextTag);
+          }
+        }
+        if (!stackNoCollapseWhitespace.length && nextTag !== 'html' && !(prevTag && nextTag)) {
+          text = collapseWhitespace(text, options, false, false, true);
+        }
+      }
+      if (options.processScripts && specialContentTags(currentTag)) {
+        text = processScript(text, options, currentAttrs);
+      }
+      if (isExecutableScript(currentTag, currentAttrs)) {
+        text = options.minifyJS(text);
+      }
+      if (isStyleSheet(currentTag, currentAttrs)) {
+        text = options.minifyCSS(text);
+      }
+      if (options.removeOptionalTags && text) {
+        // <html> may be omitted if first thing inside is not comment
+        // <body> may be omitted if first thing inside is not space, comment, <meta>, <link>, <script>, <style> or <template>
+        if (optionalStartTag === 'html' || optionalStartTag === 'body' && !/^\s/.test(text)) {
+          removeStartTag();
+        }
+        optionalStartTag = '';
+        // </html> or </body> may be omitted if not followed by comment
+        // </head>, </colgroup> or </caption> may be omitted if not followed by space or comment
+        if (compactTags(optionalEndTag) || looseTags(optionalEndTag) && !/^\s/.test(text)) {
+          removeEndTag();
+        }
+        optionalEndTag = '';
+      }
+      charsPrevTag = /^\s*$/.test(text) ? prevTag : 'comment';
+      if (options.decodeEntities && text && !specialContentTags(currentTag)) {
+        // semi-colon can be omitted
+        // https://mathiasbynens.be/notes/ambiguous-ampersands
+        text = text.replace(/&(#?[0-9a-zA-Z]+;)/g, '&amp$1').replace(/</g, '&lt;');
+      }
+      currentChars += text;
+      if (text) {
+        hasChars = true;
+      }
+      buffer.push(text);
+    },
+    comment: function(text, nonStandard) {
+      var prefix = nonStandard ? '<!' : '<!--';
+      var suffix = nonStandard ? '>' : '-->';
+      if (isConditionalComment(text)) {
+        text = prefix + cleanConditionalComment(text, options) + suffix;
+      }
+      else if (options.removeComments) {
+        if (isIgnoredComment(text, options)) {
+          text = '<!--' + text + '-->';
+        }
+        else {
+          text = '';
+        }
+      }
+      else {
+        text = prefix + text + suffix;
+      }
+      if (options.removeOptionalTags && text) {
+        // preceding comments suppress tag omissions
+        optionalStartTag = '';
+        optionalEndTag = '';
+      }
+      buffer.push(text);
+    },
+    doctype: function(doctype) {
+      buffer.push(options.useShortDoctype ? '<!DOCTYPE html>' : collapseWhitespaceAll(doctype));
+    },
+    customAttrAssign: options.customAttrAssign,
+    customAttrSurround: options.customAttrSurround
+  });
+
+  if (options.removeOptionalTags) {
+    // <html> may be omitted if first thing inside is not comment
+    // <head> or <body> may be omitted if empty
+    if (topLevelTags(optionalStartTag)) {
+      removeStartTag();
+    }
+    // except for </dt> or </thead>, end tags may be omitted if no more content in parent element
+    if (optionalEndTag && !trailingTags(optionalEndTag)) {
+      removeEndTag();
+    }
+  }
+  if (options.collapseWhitespace) {
+    squashTrailingWhitespace('br');
+  }
+
+  var str = joinResultSegments(buffer, options);
+
+  if (uidPattern) {
+    str = str.replace(uidPattern, function(match, prefix, index, suffix) {
+      var chunk = ignoredCustomMarkupChunks[+index][0];
+      if (options.collapseWhitespace) {
+        if (prefix !== '\t') {
+          chunk = prefix + chunk;
+        }
+        if (suffix !== '\t') {
+          chunk += suffix;
+        }
+        return collapseWhitespace(chunk, {
+          preserveLineBreaks: options.preserveLineBreaks,
+          conservativeCollapse: !options.trimCustomFragments
+        }, /^\s/.test(chunk), /\s$/.test(chunk));
+      }
+      return chunk;
+    });
+  }
+  if (uidIgnore) {
+    str = str.replace(new RegExp('<!--' + uidIgnore + '([0-9]+)-->', 'g'), function(match, index) {
+      return ignoredMarkupChunks[+index];
+    });
+  }
+
+  options.log('minified in: ' + (Date.now() - t) + 'ms');
+  return str;
+}
+
+function joinResultSegments(results, options) {
+  var str;
+  var maxLineLength = options.maxLineLength;
+  if (maxLineLength) {
+    var token;
+    var lines = [];
+    var line = '';
+    for (var i = 0, len = results.length; i < len; i++) {
+      token = results[i];
+      if (line.length + token.length < maxLineLength) {
+        line += token;
+      }
+      else {
+        lines.push(line.replace(/^\n/, ''));
+        line = token;
+      }
+    }
+    lines.push(line);
+
+    str = lines.join('\n');
+  }
+  else {
+    str = results.join('');
+  }
+  return options.collapseWhitespace ? collapseWhitespace(str, options, true, true) : str;
+}
+
+exports.minify = function(value, options) {
+  return minify(value, options);
+};
diff --git a/node_modules/html-minifier/src/htmlparser.js b/node_modules/html-minifier/src/htmlparser.js
new file mode 100644
index 000000000..2195347dc
--- /dev/null
+++ b/node_modules/html-minifier/src/htmlparser.js
@@ -0,0 +1,528 @@
+/*!
+ * HTML Parser By John Resig (ejohn.org)
+ * Modified by Juriy "kangax" Zaytsev
+ * Original code by Erik Arvidsson, Mozilla Public License
+ * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+ */
+
+/*
+ * // Use like so:
+ * HTMLParser(htmlString, {
+ *     start: function(tag, attrs, unary) {},
+ *     end: function(tag) {},
+ *     chars: function(text) {},
+ *     comment: function(text) {}
+ * });
+ *
+ * // or to get an XML string:
+ * HTMLtoXML(htmlString);
+ *
+ * // or to get an XML DOM Document
+ * HTMLtoDOM(htmlString);
+ *
+ * // or to inject into an existing document/DOM node
+ * HTMLtoDOM(htmlString, document);
+ * HTMLtoDOM(htmlString, document.body);
+ *
+ */
+
+ /* global ActiveXObject, DOMDocument */
+
+'use strict';
+
+var createMapFromString = require('./utils').createMapFromString;
+
+function makeMap(values) {
+  return createMapFromString(values, true);
+}
+
+// Regular Expressions for parsing tags and attributes
+var singleAttrIdentifier = /([^\s"'<>/=]+)/,
+    singleAttrAssigns = [/=/],
+    singleAttrValues = [
+      // attr value double quotes
+      /"([^"]*)"+/.source,
+      // attr value, single quotes
+      /'([^']*)'+/.source,
+      // attr value, no quotes
+      /([^ \t\n\f\r"'`=<>]+)/.source
+    ],
+    // https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
+    qnameCapture = (function() {
+      var ncname = require('ncname').source.slice(1, -1);
+      return '((?:' + ncname + '\\:)?' + ncname + ')';
+    })(),
+    startTagOpen = new RegExp('^<' + qnameCapture),
+    startTagClose = /^\s*(\/?)>/,
+    endTag = new RegExp('^<\\/' + qnameCapture + '[^>]*>'),
+    doctype = /^<!DOCTYPE [^>]+>/i;
+
+var IS_REGEX_CAPTURING_BROKEN = false;
+'x'.replace(/x(.)?/g, function(m, g) {
+  IS_REGEX_CAPTURING_BROKEN = g === '';
+});
+
+// Empty Elements
+var empty = makeMap('area,base,basefont,br,col,embed,frame,hr,img,input,isindex,keygen,link,meta,param,source,track,wbr');
+
+// Inline Elements
+var inline = makeMap('a,abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,noscript,object,q,s,samp,script,select,small,span,strike,strong,sub,sup,svg,textarea,tt,u,var');
+
+// Elements that you can, intentionally, leave open
+// (and which close themselves)
+var closeSelf = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source');
+
+// Attributes that have their values filled in disabled='disabled'
+var fillAttrs = makeMap('checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected');
+
+// Special Elements (can contain anything)
+var special = makeMap('script,style');
+
+// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+var nonPhrasing = makeMap('address,article,aside,base,blockquote,body,caption,col,colgroup,dd,details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,title,tr,track');
+
+var reCache = {};
+
+function attrForHandler(handler) {
+  var pattern = singleAttrIdentifier.source +
+                '(?:\\s*(' + joinSingleAttrAssigns(handler) + ')' +
+                '[ \\t\\n\\f\\r]*(?:' + singleAttrValues.join('|') + '))?';
+  if (handler.customAttrSurround) {
+    var attrClauses = [];
+    for (var i = handler.customAttrSurround.length - 1; i >= 0; i--) {
+      attrClauses[i] = '(?:' +
+                       '(' + handler.customAttrSurround[i][0].source + ')\\s*' +
+                       pattern +
+                       '\\s*(' + handler.customAttrSurround[i][1].source + ')' +
+                       ')';
+    }
+    attrClauses.push('(?:' + pattern + ')');
+    pattern = '(?:' + attrClauses.join('|') + ')';
+  }
+  return new RegExp('^\\s*' + pattern);
+}
+
+function joinSingleAttrAssigns(handler) {
+  return singleAttrAssigns.concat(
+    handler.customAttrAssign || []
+  ).map(function(assign) {
+    return '(?:' + assign.source + ')';
+  }).join('|');
+}
+
+function HTMLParser(html, handler) {
+  var stack = [], lastTag;
+  var attribute = attrForHandler(handler);
+  var last, prevTag, nextTag;
+  while (html) {
+    last = html;
+    // Make sure we're not in a script or style element
+    if (!lastTag || !special(lastTag)) {
+      var textEnd = html.indexOf('<');
+      if (textEnd === 0) {
+        // Comment:
+        if (/^<!--/.test(html)) {
+          var commentEnd = html.indexOf('-->');
+
+          if (commentEnd >= 0) {
+            if (handler.comment) {
+              handler.comment(html.substring(4, commentEnd));
+            }
+            html = html.substring(commentEnd + 3);
+            prevTag = '';
+            continue;
+          }
+        }
+
+        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+        if (/^<!\[/.test(html)) {
+          var conditionalEnd = html.indexOf(']>');
+
+          if (conditionalEnd >= 0) {
+            if (handler.comment) {
+              handler.comment(html.substring(2, conditionalEnd + 1), true /* non-standard */);
+            }
+            html = html.substring(conditionalEnd + 2);
+            prevTag = '';
+            continue;
+          }
+        }
+
+        // Doctype:
+        var doctypeMatch = html.match(doctype);
+        if (doctypeMatch) {
+          if (handler.doctype) {
+            handler.doctype(doctypeMatch[0]);
+          }
+          html = html.substring(doctypeMatch[0].length);
+          prevTag = '';
+          continue;
+        }
+
+        // End tag:
+        var endTagMatch = html.match(endTag);
+        if (endTagMatch) {
+          html = html.substring(endTagMatch[0].length);
+          endTagMatch[0].replace(endTag, parseEndTag);
+          prevTag = '/' + endTagMatch[1].toLowerCase();
+          continue;
+        }
+
+        // Start tag:
+        var startTagMatch = parseStartTag(html);
+        if (startTagMatch) {
+          html = startTagMatch.rest;
+          handleStartTag(startTagMatch);
+          prevTag = startTagMatch.tagName.toLowerCase();
+          continue;
+        }
+      }
+
+      var text;
+      if (textEnd >= 0) {
+        text = html.substring(0, textEnd);
+        html = html.substring(textEnd);
+      }
+      else {
+        text = html;
+        html = '';
+      }
+
+      // next tag
+      var nextTagMatch = parseStartTag(html);
+      if (nextTagMatch) {
+        nextTag = nextTagMatch.tagName;
+      }
+      else {
+        nextTagMatch = html.match(endTag);
+        if (nextTagMatch) {
+          nextTag = '/' + nextTagMatch[1];
+        }
+        else {
+          nextTag = '';
+        }
+      }
+
+      if (handler.chars) {
+        handler.chars(text, prevTag, nextTag);
+      }
+      prevTag = '';
+
+    }
+    else {
+      var stackedTag = lastTag.toLowerCase();
+      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)</' + stackedTag + '[^>]*>', 'i'));
+
+      html = html.replace(reStackedTag, function(all, text) {
+        if (stackedTag !== 'script' && stackedTag !== 'style' && stackedTag !== 'noscript') {
+          text = text
+            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+        }
+
+        if (handler.chars) {
+          handler.chars(text);
+        }
+
+        return '';
+      });
+
+      parseEndTag('</' + stackedTag + '>', stackedTag);
+    }
+
+    if (html === last) {
+      throw new Error('Parse Error: ' + html);
+    }
+  }
+
+  if (!handler.partialMarkup) {
+    // Clean up any remaining tags
+    parseEndTag();
+  }
+
+  function parseStartTag(input) {
+    var start = input.match(startTagOpen);
+    if (start) {
+      var match = {
+        tagName: start[1],
+        attrs: []
+      };
+      input = input.slice(start[0].length);
+      var end, attr;
+      while (!(end = input.match(startTagClose)) && (attr = input.match(attribute))) {
+        input = input.slice(attr[0].length);
+        match.attrs.push(attr);
+      }
+      if (end) {
+        match.unarySlash = end[1];
+        match.rest = input.slice(end[0].length);
+        return match;
+      }
+    }
+  }
+
+  function handleStartTag(match) {
+    var tagName = match.tagName;
+    var unarySlash = match.unarySlash;
+
+    if (handler.html5 && lastTag === 'p' && nonPhrasing(tagName)) {
+      parseEndTag('', lastTag);
+    }
+
+    if (!handler.html5) {
+      while (lastTag && inline(lastTag)) {
+        parseEndTag('', lastTag);
+      }
+    }
+
+    if (closeSelf(tagName) && lastTag === tagName) {
+      parseEndTag('', tagName);
+    }
+
+    var unary = empty(tagName) || tagName === 'html' && lastTag === 'head' || !!unarySlash;
+
+    var attrs = match.attrs.map(function(args) {
+      var name, value, customOpen, customClose, customAssign, quote;
+      var ncp = 7; // number of captured parts, scalar
+
+      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
+      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
+        if (args[3] === '') { delete args[3]; }
+        if (args[4] === '') { delete args[4]; }
+        if (args[5] === '') { delete args[5]; }
+      }
+
+      function populate(index) {
+        customAssign = args[index];
+        value = args[index + 1];
+        if (typeof value !== 'undefined') {
+          return '"';
+        }
+        value = args[index + 2];
+        if (typeof value !== 'undefined') {
+          return '\'';
+        }
+        value = args[index + 3];
+        if (typeof value === 'undefined' && fillAttrs(name)) {
+          value = name;
+        }
+        return '';
+      }
+
+      var j = 1;
+      if (handler.customAttrSurround) {
+        for (var i = 0, l = handler.customAttrSurround.length; i < l; i++, j += ncp) {
+          name = args[j + 1];
+          if (name) {
+            quote = populate(j + 2);
+            customOpen = args[j];
+            customClose = args[j + 6];
+            break;
+          }
+        }
+      }
+
+      if (!name && (name = args[j])) {
+        quote = populate(j + 1);
+      }
+
+      return {
+        name: name,
+        value: value,
+        customAssign: customAssign || '=',
+        customOpen: customOpen || '',
+        customClose: customClose || '',
+        quote: quote || ''
+      };
+    });
+
+    if (!unary) {
+      stack.push({ tag: tagName, attrs: attrs });
+      lastTag = tagName;
+      unarySlash = '';
+    }
+
+    if (handler.start) {
+      handler.start(tagName, attrs, unary, unarySlash);
+    }
+  }
+
+  function parseEndTag(tag, tagName) {
+    var pos;
+
+    // Find the closest opened tag of the same type
+    if (tagName) {
+      var needle = tagName.toLowerCase();
+      for (pos = stack.length - 1; pos >= 0; pos--) {
+        if (stack[pos].tag.toLowerCase() === needle) {
+          break;
+        }
+      }
+    }
+    // If no tag name is provided, clean shop
+    else {
+      pos = 0;
+    }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if (handler.end) {
+          handler.end(stack[i].tag, stack[i].attrs, i > pos || !tag);
+        }
+      }
+
+      // Remove the open elements from the stack
+      stack.length = pos;
+      lastTag = pos && stack[pos - 1].tag;
+    }
+    else if (tagName.toLowerCase() === 'br') {
+      if (handler.start) {
+        handler.start(tagName, [], true, '');
+      }
+    }
+    else if (tagName.toLowerCase() === 'p') {
+      if (handler.start) {
+        handler.start(tagName, [], false, '', true);
+      }
+      if (handler.end) {
+        handler.end(tagName, []);
+      }
+    }
+  }
+}
+
+exports.HTMLParser = HTMLParser;
+exports.HTMLtoXML = function(html) {
+  var results = '';
+
+  new HTMLParser(html, {
+    start: function(tag, attrs, unary) {
+      results += '<' + tag;
+
+      for (var i = 0, len = attrs.length; i < len; i++) {
+        results += ' ' + attrs[i].name + '="' + (attrs[i].value || '').replace(/"/g, '&#34;') + '"';
+      }
+
+      results += (unary ? '/' : '') + '>';
+    },
+    end: function(tag) {
+      results += '</' + tag + '>';
+    },
+    chars: function(text) {
+      results += text;
+    },
+    comment: function(text) {
+      results += '<!--' + text + '-->';
+    },
+    ignore: function(text) {
+      results += text;
+    }
+  });
+
+  return results;
+};
+
+exports.HTMLtoDOM = function(html, doc) {
+  // There can be only one of these elements
+  var one = {
+    html: true,
+    head: true,
+    body: true,
+    title: true
+  };
+
+  // Enforce a structure for the document
+  var structure = {
+    link: 'head',
+    base: 'head'
+  };
+
+  if (doc) {
+    doc = doc.ownerDocument || doc.getOwnerDocument && doc.getOwnerDocument() || doc;
+  }
+  else if (typeof DOMDocument !== 'undefined') {
+    doc = new DOMDocument();
+  }
+  else if (typeof document !== 'undefined' && document.implementation && document.implementation.createDocument) {
+    doc = document.implementation.createDocument('', '', null);
+  }
+  else if (typeof ActiveX !== 'undefined') {
+    doc = new ActiveXObject('Msxml.DOMDocument');
+  }
+
+  var elems = [],
+      documentElement = doc.documentElement ||
+        doc.getDocumentElement && doc.getDocumentElement();
+
+  // If we're dealing with an empty document then we
+  // need to pre-populate it with the HTML document structure
+  if (!documentElement && doc.createElement) {
+    (function() {
+      var html = doc.createElement('html');
+      var head = doc.createElement('head');
+      head.appendChild(doc.createElement('title'));
+      html.appendChild(head);
+      html.appendChild(doc.createElement('body'));
+      doc.appendChild(html);
+    })();
+  }
+
+  // Find all the unique elements
+  if (doc.getElementsByTagName) {
+    for (var i in one) {
+      one[i] = doc.getElementsByTagName(i)[0];
+    }
+  }
+
+  // If we're working with a document, inject contents into
+  // the body element
+  var curParentNode = one.body;
+
+  new HTMLParser(html, {
+    start: function(tagName, attrs, unary) {
+      // If it's a pre-built element, then we can ignore
+      // its construction
+      if (one[tagName]) {
+        curParentNode = one[tagName];
+        return;
+      }
+
+      var elem = doc.createElement(tagName);
+
+      for (var attr in attrs) {
+        elem.setAttribute(attrs[attr].name, attrs[attr].value);
+      }
+
+      if (structure[tagName] && typeof one[structure[tagName]] !== 'boolean') {
+        one[structure[tagName]].appendChild(elem);
+      }
+      else if (curParentNode && curParentNode.appendChild) {
+        curParentNode.appendChild(elem);
+      }
+
+      if (!unary) {
+        elems.push(elem);
+        curParentNode = elem;
+      }
+    },
+    end: function(/* tag */) {
+      elems.length -= 1;
+
+      // Init the new parentNode
+      curParentNode = elems[elems.length - 1];
+    },
+    chars: function(text) {
+      curParentNode.appendChild(doc.createTextNode(text));
+    },
+    comment: function(/* text */) {
+      // create comment node
+    },
+    ignore: function(/* text */) {
+      // What to do here?
+    }
+  });
+
+  return doc;
+};
diff --git a/node_modules/html-minifier/src/tokenchain.js b/node_modules/html-minifier/src/tokenchain.js
new file mode 100644
index 000000000..f8892d017
--- /dev/null
+++ b/node_modules/html-minifier/src/tokenchain.js
@@ -0,0 +1,71 @@
+'use strict';
+
+function Sorter() {
+}
+
+Sorter.prototype.sort = function(tokens, fromIndex) {
+  fromIndex = fromIndex || 0;
+  for (var i = 0, len = this.keys.length; i < len; i++) {
+    var key = this.keys[i];
+    var token = key.slice(1);
+    var index = tokens.indexOf(token, fromIndex);
+    if (index !== -1) {
+      do {
+        if (index !== fromIndex) {
+          tokens.splice(index, 1);
+          tokens.splice(fromIndex, 0, token);
+        }
+        fromIndex++;
+      } while ((index = tokens.indexOf(token, fromIndex)) !== -1);
+      return this[key].sort(tokens, fromIndex);
+    }
+  }
+  return tokens;
+};
+
+function TokenChain() {
+}
+
+TokenChain.prototype = {
+  add: function(tokens) {
+    var self = this;
+    tokens.forEach(function(token) {
+      var key = '$' + token;
+      if (!self[key]) {
+        self[key] = [];
+        self[key].processed = 0;
+      }
+      self[key].push(tokens);
+    });
+  },
+  createSorter: function() {
+    var self = this;
+    var sorter = new Sorter();
+    sorter.keys = Object.keys(self).sort(function(j, k) {
+      var m = self[j].length;
+      var n = self[k].length;
+      return m < n ? 1 : m > n ? -1 : j < k ? -1 : j > k ? 1 : 0;
+    }).filter(function(key) {
+      if (self[key].processed < self[key].length) {
+        var token = key.slice(1);
+        var chain = new TokenChain();
+        self[key].forEach(function(tokens) {
+          var index;
+          while ((index = tokens.indexOf(token)) !== -1) {
+            tokens.splice(index, 1);
+          }
+          tokens.forEach(function(token) {
+            self['$' + token].processed++;
+          });
+          chain.add(tokens.slice(0));
+        });
+        sorter[key] = chain.createSorter();
+        return true;
+      }
+      return false;
+    });
+    return sorter;
+  }
+};
+
+module.exports = TokenChain;
diff --git a/node_modules/html-minifier/src/utils.js b/node_modules/html-minifier/src/utils.js
new file mode 100644
index 000000000..62b43636d
--- /dev/null
+++ b/node_modules/html-minifier/src/utils.js
@@ -0,0 +1,18 @@
+'use strict';
+
+function createMap(values, ignoreCase) {
+  var map = {};
+  values.forEach(function(value) {
+    map[value] = 1;
+  });
+  return ignoreCase ? function(value) {
+    return map[value.toLowerCase()] === 1;
+  } : function(value) {
+    return map[value] === 1;
+  };
+}
+
+exports.createMap = createMap;
+exports.createMapFromString = function(values, ignoreCase) {
+  return createMap(values.split(/,/), ignoreCase);
+};
-- 
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