Index: imaps-frontend/node_modules/html-minifier-terser/src/htmlminifier.js
===================================================================
--- imaps-frontend/node_modules/html-minifier-terser/src/htmlminifier.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
+++ imaps-frontend/node_modules/html-minifier-terser/src/htmlminifier.js	(revision 79a03170cdde4e801d12257ee86723774970427b)
@@ -0,0 +1,1368 @@
+'use strict';
+
+var CleanCSS = require('clean-css');
+var decode = require('he').decode;
+var HTMLParser = require('./htmlparser').HTMLParser;
+var endTag = require('./htmlparser').endTag;
+var RelateUrl = require('relateurl');
+var TokenChain = require('./tokenchain');
+var Terser = require('terser');
+var utils = require('./utils');
+
+function trimWhitespace(str) {
+  return str && str.replace(/^[ \n\r\t\f]+/, '').replace(/[ \n\r\t\f]+$/, '');
+}
+
+function collapseWhitespaceAll(str) {
+  // Non-breaking space is specifically handled inside the replacer function here:
+  return str && str.replace(/[ \n\r\t\f\xA0]+/g, function(spaces) {
+    return spaces === '\t' ? '\t' : spaces.replace(/(^|\xA0+)[^\xA0]+/g, '$1 ');
+  });
+}
+
+function collapseWhitespace(str, options, trimLeft, trimRight, collapseAll) {
+  var lineBreakBefore = '', lineBreakAfter = '';
+
+  if (options.preserveLineBreaks) {
+    str = str.replace(/^[ \n\r\t\f]*?[\n\r][ \n\r\t\f]*/, function() {
+      lineBreakBefore = '\n';
+      return '';
+    }).replace(/[ \n\r\t\f]*?[\n\r][ \n\r\t\f]*$/, function() {
+      lineBreakAfter = '\n';
+      return '';
+    });
+  }
+
+  if (trimLeft) {
+    // Non-breaking space is specifically handled inside the replacer function here:
+    str = str.replace(/^[ \n\r\t\f\xA0]+/, function(spaces) {
+      var conservative = !lineBreakBefore && options.conservativeCollapse;
+      if (conservative && spaces === '\t') {
+        return '\t';
+      }
+      return spaces.replace(/^[^\xA0]+/, '').replace(/(\xA0+)[^\xA0]+/g, '$1 ') || (conservative ? ' ' : '');
+    });
+  }
+
+  if (trimRight) {
+    // Non-breaking space is specifically handled inside the replacer function here:
+    str = str.replace(/[ \n\r\t\f\xA0]+$/, 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,label,mark,math,nobr,object,q,rp,rt,rtc,ruby,s,samp,select,small,span,strike,strong,sub,sup,svg,textarea,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,rp,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) {
+  // https://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',
+  'module'
+]);
+
+var keepScriptsMimetypes = utils.createMap([
+  'module'
+]);
+
+function isScriptTypeAttribute(attrValue) {
+  attrValue = trimWhitespace(attrValue.split(/;/, 2)[0]).toLowerCase();
+  return attrValue === '' || executableScriptsMimetypes(attrValue);
+}
+
+function keepScriptTypeAttribute(attrValue) {
+  attrValue = trimWhitespace(attrValue.split(/;/, 2)[0]).toLowerCase();
+  return keepScriptsMimetypes(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);
+}
+
+async function cleanAttributeValue(tag, attrName, attrValue, options, attrs) {
+  if (isEventAttribute(attrName, options)) {
+    attrValue = trimWhitespace(attrValue).replace(/^javascript:\s*/i, '');
+    return await 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*;$/, ';');
+      }
+      attrValue = options.minifyCSS(attrValue, 'inline');
+    }
+    return attrValue;
+  }
+  else if (isSrcset(attrName, tag)) {
+    // https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-srcset
+    attrValue = trimWhitespace(attrValue).split(/\s+,\s*|\s*,\s+/).map(function(candidate) {
+      var url = candidate;
+      var descriptor = '';
+      var match = candidate.match(/\s+([1-9][0-9]*w|[0-9]+(?:\.[0-9]+)?x)$/);
+      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 (isContentSecurityPolicy(tag, attrs) && attrName.toLowerCase() === 'content') {
+    return collapseWhitespaceAll(attrValue);
+  }
+  else if (options.customAttrCollapse && options.customAttrCollapse.test(attrName)) {
+    attrValue = trimWhitespace(attrValue.replace(/ ?[\n\r]+ ?/g, '').replace(/\s{2,}/g, options.conservativeCollapse ? ' ' : ''));
+  }
+  else if (tag === 'script' && attrName === 'type') {
+    attrValue = trimWhitespace(attrValue.replace(/\s*;\s*/g, ';'));
+  }
+  else if (isMediaQuery(tag, attrs, attrName)) {
+    attrValue = trimWhitespace(attrValue);
+    return options.minifyCSS(attrValue, 'media');
+  }
+  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;
+    }
+  }
+}
+
+function isContentSecurityPolicy(tag, attrs) {
+  if (tag !== 'meta') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    if (attrs[i].name.toLowerCase() === 'http-equiv' && attrs[i].value.toLowerCase() === 'content-security-policy') {
+      return true;
+    }
+  }
+}
+
+function ignoreCSS(id) {
+  return '/* clean-css ignore:start */' + id + '/* clean-css ignore:end */';
+}
+
+// Wrap CSS declarations for CleanCSS > 3.x
+// See https://github.com/jakubpawlowicz/clean-css/issues/418
+function wrapCSS(text, type) {
+  switch (type) {
+    case 'inline':
+      return '*{' + text + '}';
+    case 'media':
+      return '@media ' + text + '{a{top:0}}';
+    default:
+      return text;
+  }
+}
+
+function unwrapCSS(text, type) {
+  var matches;
+  switch (type) {
+    case 'inline':
+      matches = text.match(/^\*\{([\s\S]*)\}$/);
+      break;
+    case 'media':
+      matches = text.match(/^@media ([\s\S]*?)\s*{[\s\S]*}$/);
+      break;
+  }
+  return matches ? matches[1] : text;
+}
+
+async function cleanConditionalComment(comment, options) {
+  return options.processConditionalComments ? await utils.replaceAsync(comment, /^(\[if\s[^\]]+]>)([\s\S]*?)(<!\[endif])$/, async function(match, prefix, text, suffix) {
+    return prefix + await minify(text, options, true) + suffix;
+  }) : comment;
+}
+
+async 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 await 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 https://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,rb,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);
+}
+
+async function normalizeAttr(attr, attrs, tag, options) {
+  var attrName = options.name(attr.name),
+      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) && !keepScriptTypeAttribute(attrValue) ||
+    options.removeStyleLinkTypeAttributes && (tag === 'style' || tag === 'link') &&
+    attrName === 'type' && isStyleLinkTypeAttribute(attrValue)) {
+    return;
+  }
+
+  if (attrValue) {
+    attrValue = await 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(values) {
+  var options = {
+    name: function(name) {
+      return name.toLowerCase();
+    },
+    canCollapseWhitespace: canCollapseWhitespace,
+    canTrimWhitespace: canTrimWhitespace,
+    html5: true,
+    ignoreCustomComments: [
+      /^!/,
+      /^\s*#/
+    ],
+    ignoreCustomFragments: [
+      /<%[\s\S]*?%>/,
+      /<\?[\s\S]*?\?>/
+    ],
+    includeAutoGeneratedTags: true,
+    log: identity,
+    minifyCSS: identity,
+    minifyJS: identity,
+    minifyURLs: identity
+  };
+  Object.keys(values).forEach(function(key) {
+    var value = values[key];
+    if (key === 'caseSensitive') {
+      if (value) {
+        options.name = identity;
+      }
+    }
+    else if (key === 'log') {
+      if (typeof value === 'function') {
+        options.log = value;
+      }
+    }
+    else if (key === 'minifyCSS' && typeof value !== 'function') {
+      if (!value) {
+        return;
+      }
+      if (typeof value !== 'object') {
+        value = {};
+      }
+      options.minifyCSS = function(text, type) {
+        text = text.replace(/(url\s*\(\s*)("|'|)(.*?)\2(\s*\))/ig, function(match, prefix, quote, url, suffix) {
+          return prefix + quote + options.minifyURLs(url) + quote + suffix;
+        });
+        var cleanCssOutput = new CleanCSS(value).minify(wrapCSS(text, type));
+        if (cleanCssOutput.errors.length > 0) {
+          cleanCssOutput.errors.forEach(options.log);
+          return text;
+        }
+        return unwrapCSS(cleanCssOutput.styles, type);
+      };
+    }
+    else if (key === 'minifyJS' && typeof value !== 'function') {
+      if (!value) {
+        return;
+      }
+      if (typeof value !== 'object') {
+        value = {};
+      }
+      (value.parse || (value.parse = {})).bare_returns = false;
+      options.minifyJS = async function(text, inline) {
+        var start = text.match(/^\s*<!--.*/);
+        var code = start ? text.slice(start[0].length).replace(/\n\s*-->\s*$/, '') : text;
+        value.parse.bare_returns = inline;
+        try {
+          const result = await Terser.minify(code, value);
+          return result.code.replace(/;$/, '');
+        }
+        catch (error) {
+          options.log(error);
+          return text;
+        }
+      };
+    }
+    else if (key === 'minifyURLs' && typeof value !== 'function') {
+      if (!value) {
+        return;
+      }
+      if (typeof value === 'string') {
+        value = { site: value };
+      }
+      else if (typeof value !== 'object') {
+        value = {};
+      }
+      options.minifyURLs = function(text) {
+        try {
+          return RelateUrl.relate(text, value);
+        }
+        catch (err) {
+          options.log(err);
+          return text;
+        }
+      };
+    }
+    else {
+      options[key] = value;
+    }
+  });
+  return options;
+}
+
+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');
+
+async 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.name(attr.name);
+    });
+  }
+
+  function shouldSkipUID(token, uid) {
+    return !uid || token.indexOf(uid) === -1;
+  }
+
+  function shouldSkipUIDs(token) {
+    return shouldSkipUID(token, uidIgnore) && shouldSkipUID(token, uidAttr);
+  }
+
+  async function scan(input) {
+    var currentTag, currentType;
+    const parser = 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 && attr.value && options.name(attr.name) === 'class') {
+            classChain.add(trimWhitespace(attr.value).split(/[ \t\n\f\r]+/).filter(shouldSkipUIDs));
+          }
+          else if (options.processScripts && attr.name.toLowerCase() === 'type') {
+            currentTag = tag;
+            currentType = attr.value;
+          }
+        }
+      },
+      end: function() {
+        currentTag = '';
+      },
+      chars: async function(text) {
+        if (options.processScripts && specialContentTags(currentTag) &&
+            options.processScripts.indexOf(currentType) > -1) {
+          await scan(text);
+        }
+      }
+    });
+
+    await parser.parse();
+  }
+
+  var log = options.log;
+  options.log = identity;
+  options.sortAttributes = false;
+  options.sortClassName = false;
+  await scan(await 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(/[ \n\f\r]+/)).join(' ');
+    };
+  }
+}
+
+async function minify(value, options, partialMarkup) {
+  if (options.collapseWhitespace) {
+    value = collapseWhitespace(value, options, true, true);
+  }
+
+  var buffer = [],
+      charsPrevTag,
+      currentChars = '',
+      hasChars,
+      currentTag = '',
+      currentAttrs = [],
+      stackNoTrimWhitespace = [],
+      stackNoCollapseWhitespace = [],
+      optionalStartTag = '',
+      optionalEndTag = '',
+      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 = options.ignoreCustomComments.slice();
+      }
+      else {
+        options.ignoreCustomComments = [];
+      }
+      options.ignoreCustomComments.push(pattern);
+    }
+    var token = '<!--' + uidIgnore + ignoredMarkupChunks.length + '-->';
+    ignoredMarkupChunks.push(group1);
+    return token;
+  });
+
+  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]+)' + uidAttr + '(\\s*)', 'g');
+        if (options.minifyCSS) {
+          options.minifyCSS = (function(fn) {
+            return function(text, type) {
+              text = text.replace(uidPattern, function(match, prefix, index) {
+                var chunks = ignoredCustomMarkupChunks[+index];
+                return chunks[1] + uidAttr + index + uidAttr + chunks[2];
+              });
+              var ids = [];
+              new CleanCSS().minify(wrapCSS(text, type)).warnings.forEach(function(warning) {
+                var match = uidPattern.exec(warning);
+                if (match) {
+                  var id = uidAttr + match[2] + uidAttr;
+                  text = text.replace(id, ignoreCSS(id));
+                  ids.push(id);
+                }
+              });
+              text = fn(text, type);
+              ids.forEach(function(id) {
+                text = text.replace(ignoreCSS(id), id);
+              });
+              return text;
+            };
+          })(options.minifyCSS);
+        }
+        if (options.minifyJS) {
+          options.minifyJS = (function(fn) {
+            return function(text, type) {
+              return fn(text.replace(uidPattern, function(match, prefix, index) {
+                var chunks = ignoredCustomMarkupChunks[+index];
+                return chunks[1] + uidAttr + index + uidAttr + chunks[2];
+              }), type);
+            };
+          })(options.minifyJS);
+        }
+      }
+      var token = uidAttr + ignoredCustomMarkupChunks.length + uidAttr;
+      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') {
+    await createSortFns(value, options, uidIgnore, uidAttr);
+  }
+
+  function _canCollapseWhitespace(tag, attrs) {
+    return options.canCollapseWhitespace(tag, attrs, canCollapseWhitespace);
+  }
+
+  function _canTrimWhitespace(tag, attrs) {
+    return options.canTrimWhitespace(tag, attrs, canTrimWhitespace);
+  }
+
+  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);
+  }
+
+  const parser = new HTMLParser(value, {
+    partialMarkup: partialMarkup,
+    continueOnParseError: options.continueOnParseError,
+    customAttrAssign: options.customAttrAssign,
+    customAttrSurround: options.customAttrSurround,
+    html5: options.html5,
+
+    start: async function(tag, attrs, unary, unarySlash, autoGenerated) {
+      if (tag.toLowerCase() === 'svg') {
+        options = Object.create(options);
+        options.caseSensitive = true;
+        options.keepClosingSlash = true;
+        options.name = identity;
+      }
+      tag = options.name(tag);
+      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 (!unary) {
+          if (!_canTrimWhitespace(tag, attrs) || stackNoTrimWhitespace.length) {
+            stackNoTrimWhitespace.push(tag);
+          }
+          if (!_canCollapseWhitespace(tag, attrs) || stackNoCollapseWhitespace.length) {
+            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 = await 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) {
+      if (tag.toLowerCase() === 'svg') {
+        options = Object.getPrototypeOf(options);
+      }
+      tag = options.name(tag);
+
+      // 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: async 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 = await processScript(text, options, currentAttrs);
+      }
+      if (isExecutableScript(currentTag, currentAttrs)) {
+        text = await 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)) {
+        // Escape any `&` symbols that start either:
+        // 1) a legacy named character reference (i.e. one that doesn't end with `;`)
+        // 2) or any other character reference (i.e. one that does end with `;`)
+        // Note that `&` can be escaped as `&amp`, without the semi-colon.
+        // https://mathiasbynens.be/notes/ambiguous-ampersands
+        text = text.replace(/&((?:Iacute|aacute|uacute|plusmn|Otilde|otilde|agrave|Agrave|Yacute|yacute|Oslash|oslash|atilde|Atilde|brvbar|ccedil|Ccedil|Ograve|curren|divide|eacute|Eacute|ograve|Oacute|egrave|Egrave|Ugrave|frac12|frac14|frac34|ugrave|oacute|iacute|Ntilde|ntilde|Uacute|middot|igrave|Igrave|iquest|Aacute|cedil|laquo|micro|iexcl|Icirc|icirc|acirc|Ucirc|Ecirc|ocirc|Ocirc|ecirc|ucirc|Aring|aring|AElig|aelig|acute|pound|raquo|Acirc|times|THORN|szlig|thorn|COPY|auml|ordf|ordm|Uuml|macr|uuml|Auml|ouml|Ouml|para|nbsp|euml|quot|QUOT|Euml|yuml|cent|sect|copy|sup1|sup2|sup3|iuml|Iuml|ETH|shy|reg|not|yen|amp|AMP|REG|uml|eth|deg|gt|GT|LT|lt)(?!;)|(?:#?[0-9a-zA-Z]+;))/g, '&amp$1').replace(/</g, '&lt;');
+      }
+      if (uidPattern && options.collapseWhitespace && stackNoTrimWhitespace.length) {
+        text = text.replace(uidPattern, function(match, prefix, index) {
+          return ignoredCustomMarkupChunks[+index][0];
+        });
+      }
+      currentChars += text;
+      if (text) {
+        hasChars = true;
+      }
+      buffer.push(text);
+    },
+    comment: async function(text, nonStandard) {
+      var prefix = nonStandard ? '<!' : '<!--';
+      var suffix = nonStandard ? '>' : '-->';
+      if (isConditionalComment(text)) {
+        text = prefix + await 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' +
+        (options.removeTagWhitespace ? '' : ' ') + 'html>' :
+        collapseWhitespaceAll(doctype));
+    }
+  });
+
+  await parser.parse();
+
+  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');
+  }
+
+  return joinResultSegments(buffer, options, uidPattern ? function(str) {
+    return 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
+        }, /^[ \n\r\t\f]/.test(chunk), /[ \n\r\t\f]$/.test(chunk));
+      }
+      return chunk;
+    });
+  } : identity, uidIgnore ? function(str) {
+    return str.replace(new RegExp('<!--' + uidIgnore + '([0-9]+)-->', 'g'), function(match, index) {
+      return ignoredMarkupChunks[+index];
+    });
+  } : identity);
+}
+
+function joinResultSegments(results, options, restoreCustom, restoreIgnore) {
+  var str;
+  var maxLineLength = options.maxLineLength;
+  var noNewlinesBeforeTagClose = options.noNewlinesBeforeTagClose;
+
+  if (maxLineLength) {
+    var line = '', lines = [];
+    while (results.length) {
+      var len = line.length;
+      var end = results[0].indexOf('\n');
+      var isClosingTag = Boolean(results[0].match(endTag));
+      var shouldKeepSameLine = noNewlinesBeforeTagClose && isClosingTag;
+      if (end < 0) {
+        line += restoreIgnore(restoreCustom(results.shift()));
+      }
+      else {
+        line += restoreIgnore(restoreCustom(results[0].slice(0, end)));
+        results[0] = results[0].slice(end + 1);
+      }
+      if (len > 0 && line.length > maxLineLength && !shouldKeepSameLine) {
+        lines.push(line.slice(0, len));
+        line = line.slice(len);
+      }
+      else if (end >= 0) {
+        lines.push(line);
+        line = '';
+      }
+    }
+    if (line) {
+      lines.push(line);
+    }
+    str = lines.join('\n');
+  }
+  else {
+    str = restoreIgnore(restoreCustom(results.join('')));
+  }
+  return options.collapseWhitespace ? collapseWhitespace(str, options, true, true) : str;
+}
+
+exports.minify = async function(value, options) {
+  var start = Date.now();
+  options = processOptions(options || {});
+  var result = await minify(value, options);
+  options.log('minified in: ' + (Date.now() - start) + 'ms');
+  return result;
+};
