setup needed libraries for browser-scripting

1 files changed, 2824 insertions, 0 deletions

diff --git a/html/assets/js/marked/marked.esm.js b/html/assets/js/marked/marked.esm.js
new file mode 100644
index 0000000..319dfb2
--- /dev/null
+++ b/html/assets/js/marked/marked.esm.js
@@ -0,0 +1,2824 @@
+/**
+ * marked v4.2.12 - a markdown parser
+ * Copyright (c) 2011-2023, Christopher Jeffrey. (MIT Licensed)
+ * https://github.com/markedjs/marked
+ */
+
+/**
+ * DO NOT EDIT THIS FILE
+ * The code in this file is generated from files in ./src/
+ */
+
+function getDefaults() {
+  return {
+    async: false,
+    baseUrl: null,
+    breaks: false,
+    extensions: null,
+    gfm: true,
+    headerIds: true,
+    headerPrefix: '',
+    highlight: null,
+    langPrefix: 'language-',
+    mangle: true,
+    pedantic: false,
+    renderer: null,
+    sanitize: false,
+    sanitizer: null,
+    silent: false,
+    smartypants: false,
+    tokenizer: null,
+    walkTokens: null,
+    xhtml: false
+  };
+}
+
+let defaults = getDefaults();
+
+function changeDefaults(newDefaults) {
+  defaults = newDefaults;
+}
+
+/**
+ * Helpers
+ */
+const escapeTest = /[&<>"']/;
+const escapeReplace = new RegExp(escapeTest.source, 'g');
+const escapeTestNoEncode = /[<>"']|&(?!(#\d{1,7}|#[Xx][a-fA-F0-9]{1,6}|\w+);)/;
+const escapeReplaceNoEncode = new RegExp(escapeTestNoEncode.source, 'g');
+const escapeReplacements = {
+  '&': '&amp;',
+  '<': '&lt;',
+  '>': '&gt;',
+  '"': '&quot;',
+  "'": '&#39;'
+};
+const getEscapeReplacement = (ch) => escapeReplacements[ch];
+function escape(html, encode) {
+  if (encode) {
+    if (escapeTest.test(html)) {
+      return html.replace(escapeReplace, getEscapeReplacement);
+    }
+  } else {
+    if (escapeTestNoEncode.test(html)) {
+      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
+    }
+  }
+
+  return html;
+}
+
+const unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+
+/**
+ * @param {string} html
+ */
+function unescape(html) {
+  // explicitly match decimal, hex, and named HTML entities
+  return html.replace(unescapeTest, (_, n) => {
+    n = n.toLowerCase();
+    if (n === 'colon') return ':';
+    if (n.charAt(0) === '#') {
+      return n.charAt(1) === 'x'
+        ? String.fromCharCode(parseInt(n.substring(2), 16))
+        : String.fromCharCode(+n.substring(1));
+    }
+    return '';
+  });
+}
+
+const caret = /(^|[^\[])\^/g;
+
+/**
+ * @param {string | RegExp} regex
+ * @param {string} opt
+ */
+function edit(regex, opt) {
+  regex = typeof regex === 'string' ? regex : regex.source;
+  opt = opt || '';
+  const obj = {
+    replace: (name, val) => {
+      val = val.source || val;
+      val = val.replace(caret, '$1');
+      regex = regex.replace(name, val);
+      return obj;
+    },
+    getRegex: () => {
+      return new RegExp(regex, opt);
+    }
+  };
+  return obj;
+}
+
+const nonWordAndColonTest = /[^\w:]/g;
+const originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
+
+/**
+ * @param {boolean} sanitize
+ * @param {string} base
+ * @param {string} href
+ */
+function cleanUrl(sanitize, base, href) {
+  if (sanitize) {
+    let prot;
+    try {
+      prot = decodeURIComponent(unescape(href))
+        .replace(nonWordAndColonTest, '')
+        .toLowerCase();
+    } catch (e) {
+      return null;
+    }
+    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+      return null;
+    }
+  }
+  if (base && !originIndependentUrl.test(href)) {
+    href = resolveUrl(base, href);
+  }
+  try {
+    href = encodeURI(href).replace(/%25/g, '%');
+  } catch (e) {
+    return null;
+  }
+  return href;
+}
+
+const baseUrls = {};
+const justDomain = /^[^:]+:\/*[^/]*$/;
+const protocol = /^([^:]+:)[\s\S]*$/;
+const domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+
+/**
+ * @param {string} base
+ * @param {string} href
+ */
+function resolveUrl(base, href) {
+  if (!baseUrls[' ' + base]) {
+    // we can ignore everything in base after the last slash of its path component,
+    // but we might need to add _that_
+    // https://tools.ietf.org/html/rfc3986#section-3
+    if (justDomain.test(base)) {
+      baseUrls[' ' + base] = base + '/';
+    } else {
+      baseUrls[' ' + base] = rtrim(base, '/', true);
+    }
+  }
+  base = baseUrls[' ' + base];
+  const relativeBase = base.indexOf(':') === -1;
+
+  if (href.substring(0, 2) === '//') {
+    if (relativeBase) {
+      return href;
+    }
+    return base.replace(protocol, '$1') + href;
+  } else if (href.charAt(0) === '/') {
+    if (relativeBase) {
+      return href;
+    }
+    return base.replace(domain, '$1') + href;
+  } else {
+    return base + href;
+  }
+}
+
+const noopTest = { exec: function noopTest() {} };
+
+function merge(obj) {
+  let i = 1,
+    target,
+    key;
+
+  for (; i < arguments.length; i++) {
+    target = arguments[i];
+    for (key in target) {
+      if (Object.prototype.hasOwnProperty.call(target, key)) {
+        obj[key] = target[key];
+      }
+    }
+  }
+
+  return obj;
+}
+
+function splitCells(tableRow, count) {
+  // ensure that every cell-delimiting pipe has a space
+  // before it to distinguish it from an escaped pipe
+  const row = tableRow.replace(/\|/g, (match, offset, str) => {
+      let escaped = false,
+        curr = offset;
+      while (--curr >= 0 && str[curr] === '\\') escaped = !escaped;
+      if (escaped) {
+        // odd number of slashes means | is escaped
+        // so we leave it alone
+        return '|';
+      } else {
+        // add space before unescaped |
+        return ' |';
+      }
+    }),
+    cells = row.split(/ \|/);
+  let i = 0;
+
+  // First/last cell in a row cannot be empty if it has no leading/trailing pipe
+  if (!cells[0].trim()) { cells.shift(); }
+  if (cells.length > 0 && !cells[cells.length - 1].trim()) { cells.pop(); }
+
+  if (cells.length > count) {
+    cells.splice(count);
+  } else {
+    while (cells.length < count) cells.push('');
+  }
+
+  for (; i < cells.length; i++) {
+    // leading or trailing whitespace is ignored per the gfm spec
+    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+  }
+  return cells;
+}
+
+/**
+ * Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+ * /c*$/ is vulnerable to REDOS.
+ *
+ * @param {string} str
+ * @param {string} c
+ * @param {boolean} invert Remove suffix of non-c chars instead. Default falsey.
+ */
+function rtrim(str, c, invert) {
+  const l = str.length;
+  if (l === 0) {
+    return '';
+  }
+
+  // Length of suffix matching the invert condition.
+  let suffLen = 0;
+
+  // Step left until we fail to match the invert condition.
+  while (suffLen < l) {
+    const currChar = str.charAt(l - suffLen - 1);
+    if (currChar === c && !invert) {
+      suffLen++;
+    } else if (currChar !== c && invert) {
+      suffLen++;
+    } else {
+      break;
+    }
+  }
+
+  return str.slice(0, l - suffLen);
+}
+
+function findClosingBracket(str, b) {
+  if (str.indexOf(b[1]) === -1) {
+    return -1;
+  }
+  const l = str.length;
+  let level = 0,
+    i = 0;
+  for (; i < l; i++) {
+    if (str[i] === '\\') {
+      i++;
+    } else if (str[i] === b[0]) {
+      level++;
+    } else if (str[i] === b[1]) {
+      level--;
+      if (level < 0) {
+        return i;
+      }
+    }
+  }
+  return -1;
+}
+
+function checkSanitizeDeprecation(opt) {
+  if (opt && opt.sanitize && !opt.silent) {
+    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+  }
+}
+
+// copied from https://stackoverflow.com/a/5450113/806777
+/**
+ * @param {string} pattern
+ * @param {number} count
+ */
+function repeatString(pattern, count) {
+  if (count < 1) {
+    return '';
+  }
+  let result = '';
+  while (count > 1) {
+    if (count & 1) {
+      result += pattern;
+    }
+    count >>= 1;
+    pattern += pattern;
+  }
+  return result + pattern;
+}
+
+function outputLink(cap, link, raw, lexer) {
+  const href = link.href;
+  const title = link.title ? escape(link.title) : null;
+  const text = cap[1].replace(/\\([\[\]])/g, '$1');
+
+  if (cap[0].charAt(0) !== '!') {
+    lexer.state.inLink = true;
+    const token = {
+      type: 'link',
+      raw,
+      href,
+      title,
+      text,
+      tokens: lexer.inlineTokens(text)
+    };
+    lexer.state.inLink = false;
+    return token;
+  }
+  return {
+    type: 'image',
+    raw,
+    href,
+    title,
+    text: escape(text)
+  };
+}
+
+function indentCodeCompensation(raw, text) {
+  const matchIndentToCode = raw.match(/^(\s+)(?:```)/);
+
+  if (matchIndentToCode === null) {
+    return text;
+  }
+
+  const indentToCode = matchIndentToCode[1];
+
+  return text
+    .split('\n')
+    .map(node => {
+      const matchIndentInNode = node.match(/^\s+/);
+      if (matchIndentInNode === null) {
+        return node;
+      }
+
+      const [indentInNode] = matchIndentInNode;
+
+      if (indentInNode.length >= indentToCode.length) {
+        return node.slice(indentToCode.length);
+      }
+
+      return node;
+    })
+    .join('\n');
+}
+
+/**
+ * Tokenizer
+ */
+class Tokenizer {
+  constructor(options) {
+    this.options = options || defaults;
+  }
+
+  space(src) {
+    const cap = this.rules.block.newline.exec(src);
+    if (cap && cap[0].length > 0) {
+      return {
+        type: 'space',
+        raw: cap[0]
+      };
+    }
+  }
+
+  code(src) {
+    const cap = this.rules.block.code.exec(src);
+    if (cap) {
+      const text = cap[0].replace(/^ {1,4}/gm, '');
+      return {
+        type: 'code',
+        raw: cap[0],
+        codeBlockStyle: 'indented',
+        text: !this.options.pedantic
+          ? rtrim(text, '\n')
+          : text
+      };
+    }
+  }
+
+  fences(src) {
+    const cap = this.rules.block.fences.exec(src);
+    if (cap) {
+      const raw = cap[0];
+      const text = indentCodeCompensation(raw, cap[3] || '');
+
+      return {
+        type: 'code',
+        raw,
+        lang: cap[2] ? cap[2].trim().replace(this.rules.inline._escapes, '$1') : cap[2],
+        text
+      };
+    }
+  }
+
+  heading(src) {
+    const cap = this.rules.block.heading.exec(src);
+    if (cap) {
+      let text = cap[2].trim();
+
+      // remove trailing #s
+      if (/#$/.test(text)) {
+        const trimmed = rtrim(text, '#');
+        if (this.options.pedantic) {
+          text = trimmed.trim();
+        } else if (!trimmed || / $/.test(trimmed)) {
+          // CommonMark requires space before trailing #s
+          text = trimmed.trim();
+        }
+      }
+
+      return {
+        type: 'heading',
+        raw: cap[0],
+        depth: cap[1].length,
+        text,
+        tokens: this.lexer.inline(text)
+      };
+    }
+  }
+
+  hr(src) {
+    const cap = this.rules.block.hr.exec(src);
+    if (cap) {
+      return {
+        type: 'hr',
+        raw: cap[0]
+      };
+    }
+  }
+
+  blockquote(src) {
+    const cap = this.rules.block.blockquote.exec(src);
+    if (cap) {
+      const text = cap[0].replace(/^ *>[ \t]?/gm, '');
+      const top = this.lexer.state.top;
+      this.lexer.state.top = true;
+      const tokens = this.lexer.blockTokens(text);
+      this.lexer.state.top = top;
+      return {
+        type: 'blockquote',
+        raw: cap[0],
+        tokens,
+        text
+      };
+    }
+  }
+
+  list(src) {
+    let cap = this.rules.block.list.exec(src);
+    if (cap) {
+      let raw, istask, ischecked, indent, i, blankLine, endsWithBlankLine,
+        line, nextLine, rawLine, itemContents, endEarly;
+
+      let bull = cap[1].trim();
+      const isordered = bull.length > 1;
+
+      const list = {
+        type: 'list',
+        raw: '',
+        ordered: isordered,
+        start: isordered ? +bull.slice(0, -1) : '',
+        loose: false,
+        items: []
+      };
+
+      bull = isordered ? `\\d{1,9}\\${bull.slice(-1)}` : `\\${bull}`;
+
+      if (this.options.pedantic) {
+        bull = isordered ? bull : '[*+-]';
+      }
+
+      // Get next list item
+      const itemRegex = new RegExp(`^( {0,3}${bull})((?:[\t ][^\\n]*)?(?:\\n|$))`);
+
+      // Check if current bullet point can start a new List Item
+      while (src) {
+        endEarly = false;
+        if (!(cap = itemRegex.exec(src))) {
+          break;
+        }
+
+        if (this.rules.block.hr.test(src)) { // End list if bullet was actually HR (possibly move into itemRegex?)
+          break;
+        }
+
+        raw = cap[0];
+        src = src.substring(raw.length);
+
+        line = cap[2].split('\n', 1)[0].replace(/^\t+/, (t) => ' '.repeat(3 * t.length));
+        nextLine = src.split('\n', 1)[0];
+
+        if (this.options.pedantic) {
+          indent = 2;
+          itemContents = line.trimLeft();
+        } else {
+          indent = cap[2].search(/[^ ]/); // Find first non-space char
+          indent = indent > 4 ? 1 : indent; // Treat indented code blocks (> 4 spaces) as having only 1 indent
+          itemContents = line.slice(indent);
+          indent += cap[1].length;
+        }
+
+        blankLine = false;
+
+        if (!line && /^ *$/.test(nextLine)) { // Items begin with at most one blank line
+          raw += nextLine + '\n';
+          src = src.substring(nextLine.length + 1);
+          endEarly = true;
+        }
+
+        if (!endEarly) {
+          const nextBulletRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:[*+-]|\\d{1,9}[.)])((?:[ \t][^\\n]*)?(?:\\n|$))`);
+          const hrRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}((?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$)`);
+          const fencesBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:\`\`\`|~~~)`);
+          const headingBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}#`);
+
+          // Check if following lines should be included in List Item
+          while (src) {
+            rawLine = src.split('\n', 1)[0];
+            nextLine = rawLine;
+
+            // Re-align to follow commonmark nesting rules
+            if (this.options.pedantic) {
+              nextLine = nextLine.replace(/^ {1,4}(?=( {4})*[^ ])/g, '  ');
+            }
+
+            // End list item if found code fences
+            if (fencesBeginRegex.test(nextLine)) {
+              break;
+            }
+
+            // End list item if found start of new heading
+            if (headingBeginRegex.test(nextLine)) {
+              break;
+            }
+
+            // End list item if found start of new bullet
+            if (nextBulletRegex.test(nextLine)) {
+              break;
+            }
+
+            // Horizontal rule found
+            if (hrRegex.test(src)) {
+              break;
+            }
+
+            if (nextLine.search(/[^ ]/) >= indent || !nextLine.trim()) { // Dedent if possible
+              itemContents += '\n' + nextLine.slice(indent);
+            } else {
+              // not enough indentation
+              if (blankLine) {
+                break;
+              }
+
+              // paragraph continuation unless last line was a different block level element
+              if (line.search(/[^ ]/) >= 4) { // indented code block
+                break;
+              }
+              if (fencesBeginRegex.test(line)) {
+                break;
+              }
+              if (headingBeginRegex.test(line)) {
+                break;
+              }
+              if (hrRegex.test(line)) {
+                break;
+              }
+
+              itemContents += '\n' + nextLine;
+            }
+
+            if (!blankLine && !nextLine.trim()) { // Check if current line is blank
+              blankLine = true;
+            }
+
+            raw += rawLine + '\n';
+            src = src.substring(rawLine.length + 1);
+            line = nextLine.slice(indent);
+          }
+        }
+
+        if (!list.loose) {
+          // If the previous item ended with a blank line, the list is loose
+          if (endsWithBlankLine) {
+            list.loose = true;
+          } else if (/\n *\n *$/.test(raw)) {
+            endsWithBlankLine = true;
+          }
+        }
+
+        // Check for task list items
+        if (this.options.gfm) {
+          istask = /^\[[ xX]\] /.exec(itemContents);
+          if (istask) {
+            ischecked = istask[0] !== '[ ] ';
+            itemContents = itemContents.replace(/^\[[ xX]\] +/, '');
+          }
+        }
+
+        list.items.push({
+          type: 'list_item',
+          raw,
+          task: !!istask,
+          checked: ischecked,
+          loose: false,
+          text: itemContents
+        });
+
+        list.raw += raw;
+      }
+
+      // Do not consume newlines at end of final item. Alternatively, make itemRegex *start* with any newlines to simplify/speed up endsWithBlankLine logic
+      list.items[list.items.length - 1].raw = raw.trimRight();
+      list.items[list.items.length - 1].text = itemContents.trimRight();
+      list.raw = list.raw.trimRight();
+
+      const l = list.items.length;
+
+      // Item child tokens handled here at end because we needed to have the final item to trim it first
+      for (i = 0; i < l; i++) {
+        this.lexer.state.top = false;
+        list.items[i].tokens = this.lexer.blockTokens(list.items[i].text, []);
+
+        if (!list.loose) {
+          // Check if list should be loose
+          const spacers = list.items[i].tokens.filter(t => t.type === 'space');
+          const hasMultipleLineBreaks = spacers.length > 0 && spacers.some(t => /\n.*\n/.test(t.raw));
+
+          list.loose = hasMultipleLineBreaks;
+        }
+      }
+
+      // Set all items to loose if list is loose
+      if (list.loose) {
+        for (i = 0; i < l; i++) {
+          list.items[i].loose = true;
+        }
+      }
+
+      return list;
+    }
+  }
+
+  html(src) {
+    const cap = this.rules.block.html.exec(src);
+    if (cap) {
+      const token = {
+        type: 'html',
+        raw: cap[0],
+        pre: !this.options.sanitizer
+          && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+        text: cap[0]
+      };
+      if (this.options.sanitize) {
+        const text = this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape(cap[0]);
+        token.type = 'paragraph';
+        token.text = text;
+        token.tokens = this.lexer.inline(text);
+      }
+      return token;
+    }
+  }
+
+  def(src) {
+    const cap = this.rules.block.def.exec(src);
+    if (cap) {
+      const tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+      const href = cap[2] ? cap[2].replace(/^<(.*)>$/, '$1').replace(this.rules.inline._escapes, '$1') : '';
+      const title = cap[3] ? cap[3].substring(1, cap[3].length - 1).replace(this.rules.inline._escapes, '$1') : cap[3];
+      return {
+        type: 'def',
+        tag,
+        raw: cap[0],
+        href,
+        title
+      };
+    }
+  }
+
+  table(src) {
+    const cap = this.rules.block.table.exec(src);
+    if (cap) {
+      const item = {
+        type: 'table',
+        header: splitCells(cap[1]).map(c => { return { text: c }; }),
+        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+        rows: cap[3] && cap[3].trim() ? cap[3].replace(/\n[ \t]*$/, '').split('\n') : []
+      };
+
+      if (item.header.length === item.align.length) {
+        item.raw = cap[0];
+
+        let l = item.align.length;
+        let i, j, k, row;
+        for (i = 0; i < l; i++) {
+          if (/^ *-+: *$/.test(item.align[i])) {
+            item.align[i] = 'right';
+          } else if (/^ *:-+: *$/.test(item.align[i])) {
+            item.align[i] = 'center';
+          } else if (/^ *:-+ *$/.test(item.align[i])) {
+            item.align[i] = 'left';
+          } else {
+            item.align[i] = null;
+          }
+        }
+
+        l = item.rows.length;
+        for (i = 0; i < l; i++) {
+          item.rows[i] = splitCells(item.rows[i], item.header.length).map(c => { return { text: c }; });
+        }
+
+        // parse child tokens inside headers and cells
+
+        // header child tokens
+        l = item.header.length;
+        for (j = 0; j < l; j++) {
+          item.header[j].tokens = this.lexer.inline(item.header[j].text);
+        }
+
+        // cell child tokens
+        l = item.rows.length;
+        for (j = 0; j < l; j++) {
+          row = item.rows[j];
+          for (k = 0; k < row.length; k++) {
+            row[k].tokens = this.lexer.inline(row[k].text);
+          }
+        }
+
+        return item;
+      }
+    }
+  }
+
+  lheading(src) {
+    const cap = this.rules.block.lheading.exec(src);
+    if (cap) {
+      return {
+        type: 'heading',
+        raw: cap[0],
+        depth: cap[2].charAt(0) === '=' ? 1 : 2,
+        text: cap[1],
+        tokens: this.lexer.inline(cap[1])
+      };
+    }
+  }
+
+  paragraph(src) {
+    const cap = this.rules.block.paragraph.exec(src);
+    if (cap) {
+      const text = cap[1].charAt(cap[1].length - 1) === '\n'
+        ? cap[1].slice(0, -1)
+        : cap[1];
+      return {
+        type: 'paragraph',
+        raw: cap[0],
+        text,
+        tokens: this.lexer.inline(text)
+      };
+    }
+  }
+
+  text(src) {
+    const cap = this.rules.block.text.exec(src);
+    if (cap) {
+      return {
+        type: 'text',
+        raw: cap[0],
+        text: cap[0],
+        tokens: this.lexer.inline(cap[0])
+      };
+    }
+  }
+
+  escape(src) {
+    const cap = this.rules.inline.escape.exec(src);
+    if (cap) {
+      return {
+        type: 'escape',
+        raw: cap[0],
+        text: escape(cap[1])
+      };
+    }
+  }
+
+  tag(src) {
+    const cap = this.rules.inline.tag.exec(src);
+    if (cap) {
+      if (!this.lexer.state.inLink && /^<a /i.test(cap[0])) {
+        this.lexer.state.inLink = true;
+      } else if (this.lexer.state.inLink && /^<\/a>/i.test(cap[0])) {
+        this.lexer.state.inLink = false;
+      }
+      if (!this.lexer.state.inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+        this.lexer.state.inRawBlock = true;
+      } else if (this.lexer.state.inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+        this.lexer.state.inRawBlock = false;
+      }
+
+      return {
+        type: this.options.sanitize
+          ? 'text'
+          : 'html',
+        raw: cap[0],
+        inLink: this.lexer.state.inLink,
+        inRawBlock: this.lexer.state.inRawBlock,
+        text: this.options.sanitize
+          ? (this.options.sanitizer
+            ? this.options.sanitizer(cap[0])
+            : escape(cap[0]))
+          : cap[0]
+      };
+    }
+  }
+
+  link(src) {
+    const cap = this.rules.inline.link.exec(src);
+    if (cap) {
+      const trimmedUrl = cap[2].trim();
+      if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+        // commonmark requires matching angle brackets
+        if (!(/>$/.test(trimmedUrl))) {
+          return;
+        }
+
+        // ending angle bracket cannot be escaped
+        const rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
+        if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
+          return;
+        }
+      } else {
+        // find closing parenthesis
+        const lastParenIndex = findClosingBracket(cap[2], '()');
+        if (lastParenIndex > -1) {
+          const start = cap[0].indexOf('!') === 0 ? 5 : 4;
+          const linkLen = start + cap[1].length + lastParenIndex;
+          cap[2] = cap[2].substring(0, lastParenIndex);
+          cap[0] = cap[0].substring(0, linkLen).trim();
+          cap[3] = '';
+        }
+      }
+      let href = cap[2];
+      let title = '';
+      if (this.options.pedantic) {
+        // split pedantic href and title
+        const link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+
+        if (link) {
+          href = link[1];
+          title = link[3];
+        }
+      } else {
+        title = cap[3] ? cap[3].slice(1, -1) : '';
+      }
+
+      href = href.trim();
+      if (/^</.test(href)) {
+        if (this.options.pedantic && !(/>$/.test(trimmedUrl))) {
+          // pedantic allows starting angle bracket without ending angle bracket
+          href = href.slice(1);
+        } else {
+          href = href.slice(1, -1);
+        }
+      }
+      return outputLink(cap, {
+        href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
+        title: title ? title.replace(this.rules.inline._escapes, '$1') : title
+      }, cap[0], this.lexer);
+    }
+  }
+
+  reflink(src, links) {
+    let cap;
+    if ((cap = this.rules.inline.reflink.exec(src))
+        || (cap = this.rules.inline.nolink.exec(src))) {
+      let link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+      link = links[link.toLowerCase()];
+      if (!link) {
+        const text = cap[0].charAt(0);
+        return {
+          type: 'text',
+          raw: text,
+          text
+        };
+      }
+      return outputLink(cap, link, cap[0], this.lexer);
+    }
+  }
+
+  emStrong(src, maskedSrc, prevChar = '') {
+    let match = this.rules.inline.emStrong.lDelim.exec(src);
+    if (!match) return;
+
+    // _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well
+    if (match[3] && prevChar.match(/[\p{L}\p{N}]/u)) return;
+
+    const nextChar = match[1] || match[2] || '';
+
+    if (!nextChar || (nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
+      const lLength = match[0].length - 1;
+      let rDelim, rLength, delimTotal = lLength, midDelimTotal = 0;
+
+      const endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
+      endReg.lastIndex = 0;
+
+      // Clip maskedSrc to same section of string as src (move to lexer?)
+      maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
+
+      while ((match = endReg.exec(maskedSrc)) != null) {
+        rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
+
+        if (!rDelim) continue; // skip single * in __abc*abc__
+
+        rLength = rDelim.length;
+
+        if (match[3] || match[4]) { // found another Left Delim
+          delimTotal += rLength;
+          continue;
+        } else if (match[5] || match[6]) { // either Left or Right Delim
+          if (lLength % 3 && !((lLength + rLength) % 3)) {
+            midDelimTotal += rLength;
+            continue; // CommonMark Emphasis Rules 9-10
+          }
+        }
+
+        delimTotal -= rLength;
+
+        if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+
+        // Remove extra characters. *a*** -> *a*
+        rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal);
+
+        const raw = src.slice(0, lLength + match.index + (match[0].length - rDelim.length) + rLength);
+
+        // Create `em` if smallest delimiter has odd char count. *a***
+        if (Math.min(lLength, rLength) % 2) {
+          const text = raw.slice(1, -1);
+          return {
+            type: 'em',
+            raw,
+            text,
+            tokens: this.lexer.inlineTokens(text)
+          };
+        }
+
+        // Create 'strong' if smallest delimiter has even char count. **a***
+        const text = raw.slice(2, -2);
+        return {
+          type: 'strong',
+          raw,
+          text,
+          tokens: this.lexer.inlineTokens(text)
+        };
+      }
+    }
+  }
+
+  codespan(src) {
+    const cap = this.rules.inline.code.exec(src);
+    if (cap) {
+      let text = cap[2].replace(/\n/g, ' ');
+      const hasNonSpaceChars = /[^ ]/.test(text);
+      const hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
+      if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+        text = text.substring(1, text.length - 1);
+      }
+      text = escape(text, true);
+      return {
+        type: 'codespan',
+        raw: cap[0],
+        text
+      };
+    }
+  }
+
+  br(src) {
+    const cap = this.rules.inline.br.exec(src);
+    if (cap) {
+      return {
+        type: 'br',
+        raw: cap[0]
+      };
+    }
+  }
+
+  del(src) {
+    const cap = this.rules.inline.del.exec(src);
+    if (cap) {
+      return {
+        type: 'del',
+        raw: cap[0],
+        text: cap[2],
+        tokens: this.lexer.inlineTokens(cap[2])
+      };
+    }
+  }
+
+  autolink(src, mangle) {
+    const cap = this.rules.inline.autolink.exec(src);
+    if (cap) {
+      let text, href;
+      if (cap[2] === '@') {
+        text = escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+        href = 'mailto:' + text;
+      } else {
+        text = escape(cap[1]);
+        href = text;
+      }
+
+      return {
+        type: 'link',
+        raw: cap[0],
+        text,
+        href,
+        tokens: [
+          {
+            type: 'text',
+            raw: text,
+            text
+          }
+        ]
+      };
+    }
+  }
+
+  url(src, mangle) {
+    let cap;
+    if (cap = this.rules.inline.url.exec(src)) {
+      let text, href;
+      if (cap[2] === '@') {
+        text = escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+        href = 'mailto:' + text;
+      } else {
+        // do extended autolink path validation
+        let prevCapZero;
+        do {
+          prevCapZero = cap[0];
+          cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+        } while (prevCapZero !== cap[0]);
+        text = escape(cap[0]);
+        if (cap[1] === 'www.') {
+          href = 'http://' + cap[0];
+        } else {
+          href = cap[0];
+        }
+      }
+      return {
+        type: 'link',
+        raw: cap[0],
+        text,
+        href,
+        tokens: [
+          {
+            type: 'text',
+            raw: text,
+            text
+          }
+        ]
+      };
+    }
+  }
+
+  inlineText(src, smartypants) {
+    const cap = this.rules.inline.text.exec(src);
+    if (cap) {
+      let text;
+      if (this.lexer.state.inRawBlock) {
+        text = this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape(cap[0])) : cap[0];
+      } else {
+        text = escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
+      }
+      return {
+        type: 'text',
+        raw: cap[0],
+        text
+      };
+    }
+  }
+}
+
+/**
+ * Block-Level Grammar
+ */
+const block = {
+  newline: /^(?: *(?:\n|$))+/,
+  code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
+  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?=\n|$)|$)/,
+  hr: /^ {0,3}((?:-[\t ]*){3,}|(?:_[ \t]*){3,}|(?:\*[ \t]*){3,})(?:\n+|$)/,
+  heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
+  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+  list: /^( {0,3}bull)([ \t][^\n]+?)?(?:\n|$)/,
+  html: '^ {0,3}(?:' // optional indentation
+    + '<(script|pre|style|textarea)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+    + '|comment[^\\n]*(\\n+|$)' // (2)
+    + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
+    + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
+    + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
+    + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
+    + '|<(?!script|pre|style|textarea)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
+    + '|</(?!script|pre|style|textarea)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
+    + ')',
+  def: /^ {0,3}\[(label)\]: *(?:\n *)?([^<\s][^\s]*|<.*?>)(?:(?: +(?:\n *)?| *\n *)(title))? *(?:\n+|$)/,
+  table: noopTest,
+  lheading: /^((?:.|\n(?!\n))+?)\n {0,3}(=+|-+) *(?:\n+|$)/,
+  // regex template, placeholders will be replaced according to different paragraph
+  // interruption rules of commonmark and the original markdown spec:
+  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html|table| +\n)[^\n]+)*)/,
+  text: /^[^\n]+/
+};
+
+block._label = /(?!\s*\])(?:\\.|[^\[\]\\])+/;
+block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+block.def = edit(block.def)
+  .replace('label', block._label)
+  .replace('title', block._title)
+  .getRegex();
+
+block.bullet = /(?:[*+-]|\d{1,9}[.)])/;
+block.listItemStart = edit(/^( *)(bull) */)
+  .replace('bull', block.bullet)
+  .getRegex();
+
+block.list = edit(block.list)
+  .replace(/bull/g, block.bullet)
+  .replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
+  .replace('def', '\\n+(?=' + block.def.source + ')')
+  .getRegex();
+
+block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
+  + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
+  + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
+  + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
+  + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
+  + '|track|ul';
+block._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
+block.html = edit(block.html, 'i')
+  .replace('comment', block._comment)
+  .replace('tag', block._tag)
+  .replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
+  .getRegex();
+
+block.paragraph = edit(block._paragraph)
+  .replace('hr', block.hr)
+  .replace('heading', ' {0,3}#{1,6} ')
+  .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+  .replace('|table', '')
+  .replace('blockquote', ' {0,3}>')
+  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
+  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|textarea|!--)')
+  .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
+  .getRegex();
+
+block.blockquote = edit(block.blockquote)
+  .replace('paragraph', block.paragraph)
+  .getRegex();
+
+/**
+ * Normal Block Grammar
+ */
+
+block.normal = merge({}, block);
+
+/**
+ * GFM Block Grammar
+ */
+
+block.gfm = merge({}, block.normal, {
+  table: '^ *([^\\n ].*\\|.*)\\n' // Header
+    + ' {0,3}(?:\\| *)?(:?-+:? *(?:\\| *:?-+:? *)*)(?:\\| *)?' // Align
+    + '(?:\\n((?:(?! *\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
+});
+
+block.gfm.table = edit(block.gfm.table)
+  .replace('hr', block.hr)
+  .replace('heading', ' {0,3}#{1,6} ')
+  .replace('blockquote', ' {0,3}>')
+  .replace('code', ' {4}[^\\n]')
+  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
+  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|textarea|!--)')
+  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
+  .getRegex();
+
+block.gfm.paragraph = edit(block._paragraph)
+  .replace('hr', block.hr)
+  .replace('heading', ' {0,3}#{1,6} ')
+  .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+  .replace('table', block.gfm.table) // interrupt paragraphs with table
+  .replace('blockquote', ' {0,3}>')
+  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
+  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|textarea|!--)')
+  .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
+  .getRegex();
+/**
+ * Pedantic grammar (original John Gruber's loose markdown specification)
+ */
+
+block.pedantic = merge({}, block.normal, {
+  html: edit(
+    '^ *(?:comment *(?:\\n|\\s*$)'
+    + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+    + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
+    .replace('comment', block._comment)
+    .replace(/tag/g, '(?!(?:'
+      + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
+      + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
+      + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
+    .getRegex(),
+  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+  heading: /^(#{1,6})(.*)(?:\n+|$)/,
+  fences: noopTest, // fences not supported
+  lheading: /^(.+?)\n {0,3}(=+|-+) *(?:\n+|$)/,
+  paragraph: edit(block.normal._paragraph)
+    .replace('hr', block.hr)
+    .replace('heading', ' *#{1,6} *[^\n]')
+    .replace('lheading', block.lheading)
+    .replace('blockquote', ' {0,3}>')
+    .replace('|fences', '')
+    .replace('|list', '')
+    .replace('|html', '')
+    .getRegex()
+});
+
+/**
+ * Inline-Level Grammar
+ */
+const inline = {
+  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+  url: noopTest,
+  tag: '^comment'
+    + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+    + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+    + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+    + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+    + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
+  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
+  reflink: /^!?\[(label)\]\[(ref)\]/,
+  nolink: /^!?\[(ref)\](?:\[\])?/,
+  reflinkSearch: 'reflink|nolink(?!\\()',
+  emStrong: {
+    lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
+    //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.
+    //          () Skip orphan inside strong                                      () Consume to delim     (1) #***                (2) a***#, a***                             (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a
+    rDelimAst: /^(?:[^_*\\]|\\.)*?\_\_(?:[^_*\\]|\\.)*?\*(?:[^_*\\]|\\.)*?(?=\_\_)|(?:[^*\\]|\\.)+(?=[^*])|[punct_](\*+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|(?:[^punct*_\s\\]|\\.)(\*+)(?=[^punct*_\s])/,
+    rDelimUnd: /^(?:[^_*\\]|\\.)*?\*\*(?:[^_*\\]|\\.)*?\_(?:[^_*\\]|\\.)*?(?=\*\*)|(?:[^_\\]|\\.)+(?=[^_])|[punct*](\_+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _
+  },
+  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+  br: /^( {2,}|\\)\n(?!\s*$)/,
+  del: noopTest,
+  text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
+  punctuation: /^([\spunctuation])/
+};
+
+// list of punctuation marks from CommonMark spec
+// without * and _ to handle the different emphasis markers * and _
+inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+inline.punctuation = edit(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex();
+
+// sequences em should skip over [title](link), `code`, <html>
+inline.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
+// lookbehind is not available on Safari as of version 16
+// inline.escapedEmSt = /(?<=(?:^|[^\\)(?:\\[^])*)\\[*_]/g;
+inline.escapedEmSt = /(?:^|[^\\])(?:\\\\)*\\[*_]/g;
+
+inline._comment = edit(block._comment).replace('(?:-->|$)', '-->').getRegex();
+
+inline.emStrong.lDelim = edit(inline.emStrong.lDelim)
+  .replace(/punct/g, inline._punctuation)
+  .getRegex();
+
+inline.emStrong.rDelimAst = edit(inline.emStrong.rDelimAst, 'g')
+  .replace(/punct/g, inline._punctuation)
+  .getRegex();
+
+inline.emStrong.rDelimUnd = edit(inline.emStrong.rDelimUnd, 'g')
+  .replace(/punct/g, inline._punctuation)
+  .getRegex();
+
+inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+
+inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+inline.autolink = edit(inline.autolink)
+  .replace('scheme', inline._scheme)
+  .replace('email', inline._email)
+  .getRegex();
+
+inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+
+inline.tag = edit(inline.tag)
+  .replace('comment', inline._comment)
+  .replace('attribute', inline._attribute)
+  .getRegex();
+
+inline._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
+inline._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
+inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+
+inline.link = edit(inline.link)
+  .replace('label', inline._label)
+  .replace('href', inline._href)
+  .replace('title', inline._title)
+  .getRegex();
+
+inline.reflink = edit(inline.reflink)
+  .replace('label', inline._label)
+  .replace('ref', block._label)
+  .getRegex();
+
+inline.nolink = edit(inline.nolink)
+  .replace('ref', block._label)
+  .getRegex();
+
+inline.reflinkSearch = edit(inline.reflinkSearch, 'g')
+  .replace('reflink', inline.reflink)
+  .replace('nolink', inline.nolink)
+  .getRegex();
+
+/**
+ * Normal Inline Grammar
+ */
+
+inline.normal = merge({}, inline);
+
+/**
+ * Pedantic Inline Grammar
+ */
+
+inline.pedantic = merge({}, inline.normal, {
+  strong: {
+    start: /^__|\*\*/,
+    middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+    endAst: /\*\*(?!\*)/g,
+    endUnd: /__(?!_)/g
+  },
+  em: {
+    start: /^_|\*/,
+    middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
+    endAst: /\*(?!\*)/g,
+    endUnd: /_(?!_)/g
+  },
+  link: edit(/^!?\[(label)\]\((.*?)\)/)
+    .replace('label', inline._label)
+    .getRegex(),
+  reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/)
+    .replace('label', inline._label)
+    .getRegex()
+});
+
+/**
+ * GFM Inline Grammar
+ */
+
+inline.gfm = merge({}, inline.normal, {
+  escape: edit(inline.escape).replace('])', '~|])').getRegex(),
+  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+  _backpedal: /(?:[^?!.,:;*_'"~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_'"~)]+(?!$))+/,
+  del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
+  text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
+});
+
+inline.gfm.url = edit(inline.gfm.url, 'i')
+  .replace('email', inline.gfm._extended_email)
+  .getRegex();
+/**
+ * GFM + Line Breaks Inline Grammar
+ */
+
+inline.breaks = merge({}, inline.gfm, {
+  br: edit(inline.br).replace('{2,}', '*').getRegex(),
+  text: edit(inline.gfm.text)
+    .replace('\\b_', '\\b_| {2,}\\n')
+    .replace(/\{2,\}/g, '*')
+    .getRegex()
+});
+
+/**
+ * smartypants text replacement
+ * @param {string} text
+ */
+function smartypants(text) {
+  return text
+    // em-dashes
+    .replace(/---/g, '\u2014')
+    // en-dashes
+    .replace(/--/g, '\u2013')
+    // opening singles
+    .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
+    // closing singles & apostrophes
+    .replace(/'/g, '\u2019')
+    // opening doubles
+    .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
+    // closing doubles
+    .replace(/"/g, '\u201d')
+    // ellipses
+    .replace(/\.{3}/g, '\u2026');
+}
+
+/**
+ * mangle email addresses
+ * @param {string} text
+ */
+function mangle(text) {
+  let out = '',
+    i,
+    ch;
+
+  const l = text.length;
+  for (i = 0; i < l; i++) {
+    ch = text.charCodeAt(i);
+    if (Math.random() > 0.5) {
+      ch = 'x' + ch.toString(16);
+    }
+    out += '&#' + ch + ';';
+  }
+
+  return out;
+}
+
+/**
+ * Block Lexer
+ */
+class Lexer {
+  constructor(options) {
+    this.tokens = [];
+    this.tokens.links = Object.create(null);
+    this.options = options || defaults;
+    this.options.tokenizer = this.options.tokenizer || new Tokenizer();
+    this.tokenizer = this.options.tokenizer;
+    this.tokenizer.options = this.options;
+    this.tokenizer.lexer = this;
+    this.inlineQueue = [];
+    this.state = {
+      inLink: false,
+      inRawBlock: false,
+      top: true
+    };
+
+    const rules = {
+      block: block.normal,
+      inline: inline.normal
+    };
+
+    if (this.options.pedantic) {
+      rules.block = block.pedantic;
+      rules.inline = inline.pedantic;
+    } else if (this.options.gfm) {
+      rules.block = block.gfm;
+      if (this.options.breaks) {
+        rules.inline = inline.breaks;
+      } else {
+        rules.inline = inline.gfm;
+      }
+    }
+    this.tokenizer.rules = rules;
+  }
+
+  /**
+   * Expose Rules
+   */
+  static get rules() {
+    return {
+      block,
+      inline
+    };
+  }
+
+  /**
+   * Static Lex Method
+   */
+  static lex(src, options) {
+    const lexer = new Lexer(options);
+    return lexer.lex(src);
+  }
+
+  /**
+   * Static Lex Inline Method
+   */
+  static lexInline(src, options) {
+    const lexer = new Lexer(options);
+    return lexer.inlineTokens(src);
+  }
+
+  /**
+   * Preprocessing
+   */
+  lex(src) {
+    src = src
+      .replace(/\r\n|\r/g, '\n');
+
+    this.blockTokens(src, this.tokens);
+
+    let next;
+    while (next = this.inlineQueue.shift()) {
+      this.inlineTokens(next.src, next.tokens);
+    }
+
+    return this.tokens;
+  }
+
+  /**
+   * Lexing
+   */
+  blockTokens(src, tokens = []) {
+    if (this.options.pedantic) {
+      src = src.replace(/\t/g, '    ').replace(/^ +$/gm, '');
+    } else {
+      src = src.replace(/^( *)(\t+)/gm, (_, leading, tabs) => {
+        return leading + '    '.repeat(tabs.length);
+      });
+    }
+
+    let token, lastToken, cutSrc, lastParagraphClipped;
+
+    while (src) {
+      if (this.options.extensions
+        && this.options.extensions.block
+        && this.options.extensions.block.some((extTokenizer) => {
+          if (token = extTokenizer.call({ lexer: this }, src, tokens)) {
+            src = src.substring(token.raw.length);
+            tokens.push(token);
+            return true;
+          }
+          return false;
+        })) {
+        continue;
+      }
+
+      // newline
+      if (token = this.tokenizer.space(src)) {
+        src = src.substring(token.raw.length);
+        if (token.raw.length === 1 && tokens.length > 0) {
+          // if there's a single \n as a spacer, it's terminating the last line,
+          // so move it there so that we don't get unecessary paragraph tags
+          tokens[tokens.length - 1].raw += '\n';
+        } else {
+          tokens.push(token);
+        }
+        continue;
+      }
+
+      // code
+      if (token = this.tokenizer.code(src)) {
+        src = src.substring(token.raw.length);
+        lastToken = tokens[tokens.length - 1];
+        // An indented code block cannot interrupt a paragraph.
+        if (lastToken && (lastToken.type === 'paragraph' || lastToken.type === 'text')) {
+          lastToken.raw += '\n' + token.raw;
+          lastToken.text += '\n' + token.text;
+          this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
+        } else {
+          tokens.push(token);
+        }
+        continue;
+      }
+
+      // fences
+      if (token = this.tokenizer.fences(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // heading
+      if (token = this.tokenizer.heading(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // hr
+      if (token = this.tokenizer.hr(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // blockquote
+      if (token = this.tokenizer.blockquote(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // list
+      if (token = this.tokenizer.list(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // html
+      if (token = this.tokenizer.html(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // def
+      if (token = this.tokenizer.def(src)) {
+        src = src.substring(token.raw.length);
+        lastToken = tokens[tokens.length - 1];
+        if (lastToken && (lastToken.type === 'paragraph' || lastToken.type === 'text')) {
+          lastToken.raw += '\n' + token.raw;
+          lastToken.text += '\n' + token.raw;
+          this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
+        } else if (!this.tokens.links[token.tag]) {
+          this.tokens.links[token.tag] = {
+            href: token.href,
+            title: token.title
+          };
+        }
+        continue;
+      }
+
+      // table (gfm)
+      if (token = this.tokenizer.table(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // lheading
+      if (token = this.tokenizer.lheading(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // top-level paragraph
+      // prevent paragraph consuming extensions by clipping 'src' to extension start
+      cutSrc = src;
+      if (this.options.extensions && this.options.extensions.startBlock) {
+        let startIndex = Infinity;
+        const tempSrc = src.slice(1);
+        let tempStart;
+        this.options.extensions.startBlock.forEach(function(getStartIndex) {
+          tempStart = getStartIndex.call({ lexer: this }, tempSrc);
+          if (typeof tempStart === 'number' && tempStart >= 0) { startIndex = Math.min(startIndex, tempStart); }
+        });
+        if (startIndex < Infinity && startIndex >= 0) {
+          cutSrc = src.substring(0, startIndex + 1);
+        }
+      }
+      if (this.state.top && (token = this.tokenizer.paragraph(cutSrc))) {
+        lastToken = tokens[tokens.length - 1];
+        if (lastParagraphClipped && lastToken.type === 'paragraph') {
+          lastToken.raw += '\n' + token.raw;
+          lastToken.text += '\n' + token.text;
+          this.inlineQueue.pop();
+          this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
+        } else {
+          tokens.push(token);
+        }
+        lastParagraphClipped = (cutSrc.length !== src.length);
+        src = src.substring(token.raw.length);
+        continue;
+      }
+
+      // text
+      if (token = this.tokenizer.text(src)) {
+        src = src.substring(token.raw.length);
+        lastToken = tokens[tokens.length - 1];
+        if (lastToken && lastToken.type === 'text') {
+          lastToken.raw += '\n' + token.raw;
+          lastToken.text += '\n' + token.text;
+          this.inlineQueue.pop();
+          this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
+        } else {
+          tokens.push(token);
+        }
+        continue;
+      }
+
+      if (src) {
+        const errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+        if (this.options.silent) {
+          console.error(errMsg);
+          break;
+        } else {
+          throw new Error(errMsg);
+        }
+      }
+    }
+
+    this.state.top = true;
+    return tokens;
+  }
+
+  inline(src, tokens = []) {
+    this.inlineQueue.push({ src, tokens });
+    return tokens;
+  }
+
+  /**
+   * Lexing/Compiling
+   */
+  inlineTokens(src, tokens = []) {
+    let token, lastToken, cutSrc;
+
+    // String with links masked to avoid interference with em and strong
+    let maskedSrc = src;
+    let match;
+    let keepPrevChar, prevChar;
+
+    // Mask out reflinks
+    if (this.tokens.links) {
+      const links = Object.keys(this.tokens.links);
+      if (links.length > 0) {
+        while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
+          if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
+            maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+          }
+        }
+      }
+    }
+    // Mask out other blocks
+    while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
+      maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+    }
+
+    // Mask out escaped em & strong delimiters
+    while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+      maskedSrc = maskedSrc.slice(0, match.index + match[0].length - 2) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
+      this.tokenizer.rules.inline.escapedEmSt.lastIndex--;
+    }
+
+    while (src) {
+      if (!keepPrevChar) {
+        prevChar = '';
+      }
+      keepPrevChar = false;
+
+      // extensions
+      if (this.options.extensions
+        && this.options.extensions.inline
+        && this.options.extensions.inline.some((extTokenizer) => {
+          if (token = extTokenizer.call({ lexer: this }, src, tokens)) {
+            src = src.substring(token.raw.length);
+            tokens.push(token);
+            return true;
+          }
+          return false;
+        })) {
+        continue;
+      }
+
+      // escape
+      if (token = this.tokenizer.escape(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // tag
+      if (token = this.tokenizer.tag(src)) {
+        src = src.substring(token.raw.length);
+        lastToken = tokens[tokens.length - 1];
+        if (lastToken && token.type === 'text' && lastToken.type === 'text') {
+          lastToken.raw += token.raw;
+          lastToken.text += token.text;
+        } else {
+          tokens.push(token);
+        }
+        continue;
+      }
+
+      // link
+      if (token = this.tokenizer.link(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // reflink, nolink
+      if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+        src = src.substring(token.raw.length);
+        lastToken = tokens[tokens.length - 1];
+        if (lastToken && token.type === 'text' && lastToken.type === 'text') {
+          lastToken.raw += token.raw;
+          lastToken.text += token.text;
+        } else {
+          tokens.push(token);
+        }
+        continue;
+      }
+
+      // em & strong
+      if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // code
+      if (token = this.tokenizer.codespan(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // br
+      if (token = this.tokenizer.br(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // del (gfm)
+      if (token = this.tokenizer.del(src)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // autolink
+      if (token = this.tokenizer.autolink(src, mangle)) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // url (gfm)
+      if (!this.state.inLink && (token = this.tokenizer.url(src, mangle))) {
+        src = src.substring(token.raw.length);
+        tokens.push(token);
+        continue;
+      }
+
+      // text
+      // prevent inlineText consuming extensions by clipping 'src' to extension start
+      cutSrc = src;
+      if (this.options.extensions && this.options.extensions.startInline) {
+        let startIndex = Infinity;
+        const tempSrc = src.slice(1);
+        let tempStart;
+        this.options.extensions.startInline.forEach(function(getStartIndex) {
+          tempStart = getStartIndex.call({ lexer: this }, tempSrc);
+          if (typeof tempStart === 'number' && tempStart >= 0) { startIndex = Math.min(startIndex, tempStart); }
+        });
+        if (startIndex < Infinity && startIndex >= 0) {
+          cutSrc = src.substring(0, startIndex + 1);
+        }
+      }
+      if (token = this.tokenizer.inlineText(cutSrc, smartypants)) {
+        src = src.substring(token.raw.length);
+        if (token.raw.slice(-1) !== '_') { // Track prevChar before string of ____ started
+          prevChar = token.raw.slice(-1);
+        }
+        keepPrevChar = true;
+        lastToken = tokens[tokens.length - 1];
+        if (lastToken && lastToken.type === 'text') {
+          lastToken.raw += token.raw;
+          lastToken.text += token.text;
+        } else {
+          tokens.push(token);
+        }
+        continue;
+      }
+
+      if (src) {
+        const errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+        if (this.options.silent) {
+          console.error(errMsg);
+          break;
+        } else {
+          throw new Error(errMsg);
+        }
+      }
+    }
+
+    return tokens;
+  }
+}
+
+/**
+ * Renderer
+ */
+class Renderer {
+  constructor(options) {
+    this.options = options || defaults;
+  }
+
+  code(code, infostring, escaped) {
+    const lang = (infostring || '').match(/\S*/)[0];
+    if (this.options.highlight) {
+      const out = this.options.highlight(code, lang);
+      if (out != null && out !== code) {
+        escaped = true;
+        code = out;
+      }
+    }
+
+    code = code.replace(/\n$/, '') + '\n';
+
+    if (!lang) {
+      return '<pre><code>'
+        + (escaped ? code : escape(code, true))
+        + '</code></pre>\n';
+    }
+
+    return '<pre><code class="'
+      + this.options.langPrefix
+      + escape(lang)
+      + '">'
+      + (escaped ? code : escape(code, true))
+      + '</code></pre>\n';
+  }
+
+  /**
+   * @param {string} quote
+   */
+  blockquote(quote) {
+    return `<blockquote>\n${quote}</blockquote>\n`;
+  }
+
+  html(html) {
+    return html;
+  }
+
+  /**
+   * @param {string} text
+   * @param {string} level
+   * @param {string} raw
+   * @param {any} slugger
+   */
+  heading(text, level, raw, slugger) {
+    if (this.options.headerIds) {
+      const id = this.options.headerPrefix + slugger.slug(raw);
+      return `<h${level} id="${id}">${text}</h${level}>\n`;
+    }
+
+    // ignore IDs
+    return `<h${level}>${text}</h${level}>\n`;
+  }
+
+  hr() {
+    return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+  }
+
+  list(body, ordered, start) {
+    const type = ordered ? 'ol' : 'ul',
+      startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
+    return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+  }
+
+  /**
+   * @param {string} text
+   */
+  listitem(text) {
+    return `<li>${text}</li>\n`;
+  }
+
+  checkbox(checked) {
+    return '<input '
+      + (checked ? 'checked="" ' : '')
+      + 'disabled="" type="checkbox"'
+      + (this.options.xhtml ? ' /' : '')
+      + '> ';
+  }
+
+  /**
+   * @param {string} text
+   */
+  paragraph(text) {
+    return `<p>${text}</p>\n`;
+  }
+
+  /**
+   * @param {string} header
+   * @param {string} body
+   */
+  table(header, body) {
+    if (body) body = `<tbody>${body}</tbody>`;
+
+    return '<table>\n'
+      + '<thead>\n'
+      + header
+      + '</thead>\n'
+      + body
+      + '</table>\n';
+  }
+
+  /**
+   * @param {string} content
+   */
+  tablerow(content) {
+    return `<tr>\n${content}</tr>\n`;
+  }
+
+  tablecell(content, flags) {
+    const type = flags.header ? 'th' : 'td';
+    const tag = flags.align
+      ? `<${type} align="${flags.align}">`
+      : `<${type}>`;
+    return tag + content + `</${type}>\n`;
+  }
+
+  /**
+   * span level renderer
+   * @param {string} text
+   */
+  strong(text) {
+    return `<strong>${text}</strong>`;
+  }
+
+  /**
+   * @param {string} text
+   */
+  em(text) {
+    return `<em>${text}</em>`;
+  }
+
+  /**
+   * @param {string} text
+   */
+  codespan(text) {
+    return `<code>${text}</code>`;
+  }
+
+  br() {
+    return this.options.xhtml ? '<br/>' : '<br>';
+  }
+
+  /**
+   * @param {string} text
+   */
+  del(text) {
+    return `<del>${text}</del>`;
+  }
+
+  /**
+   * @param {string} href
+   * @param {string} title
+   * @param {string} text
+   */
+  link(href, title, text) {
+    href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
+    if (href === null) {
+      return text;
+    }
+    let out = '<a href="' + href + '"';
+    if (title) {
+      out += ' title="' + title + '"';
+    }
+    out += '>' + text + '</a>';
+    return out;
+  }
+
+  /**
+   * @param {string} href
+   * @param {string} title
+   * @param {string} text
+   */
+  image(href, title, text) {
+    href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
+    if (href === null) {
+      return text;
+    }
+
+    let out = `<img src="${href}" alt="${text}"`;
+    if (title) {
+      out += ` title="${title}"`;
+    }
+    out += this.options.xhtml ? '/>' : '>';
+    return out;
+  }
+
+  text(text) {
+    return text;
+  }
+}
+
+/**
+ * TextRenderer
+ * returns only the textual part of the token
+ */
+class TextRenderer {
+  // no need for block level renderers
+  strong(text) {
+    return text;
+  }
+
+  em(text) {
+    return text;
+  }
+
+  codespan(text) {
+    return text;
+  }
+
+  del(text) {
+    return text;
+  }
+
+  html(text) {
+    return text;
+  }
+
+  text(text) {
+    return text;
+  }
+
+  link(href, title, text) {
+    return '' + text;
+  }
+
+  image(href, title, text) {
+    return '' + text;
+  }
+
+  br() {
+    return '';
+  }
+}
+
+/**
+ * Slugger generates header id
+ */
+class Slugger {
+  constructor() {
+    this.seen = {};
+  }
+
+  /**
+   * @param {string} value
+   */
+  serialize(value) {
+    return value
+      .toLowerCase()
+      .trim()
+      // remove html tags
+      .replace(/<[!\/a-z].*?>/ig, '')
+      // remove unwanted chars
+      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '')
+      .replace(/\s/g, '-');
+  }
+
+  /**
+   * Finds the next safe (unique) slug to use
+   * @param {string} originalSlug
+   * @param {boolean} isDryRun
+   */
+  getNextSafeSlug(originalSlug, isDryRun) {
+    let slug = originalSlug;
+    let occurenceAccumulator = 0;
+    if (this.seen.hasOwnProperty(slug)) {
+      occurenceAccumulator = this.seen[originalSlug];
+      do {
+        occurenceAccumulator++;
+        slug = originalSlug + '-' + occurenceAccumulator;
+      } while (this.seen.hasOwnProperty(slug));
+    }
+    if (!isDryRun) {
+      this.seen[originalSlug] = occurenceAccumulator;
+      this.seen[slug] = 0;
+    }
+    return slug;
+  }
+
+  /**
+   * Convert string to unique id
+   * @param {object} [options]
+   * @param {boolean} [options.dryrun] Generates the next unique slug without
+   * updating the internal accumulator.
+   */
+  slug(value, options = {}) {
+    const slug = this.serialize(value);
+    return this.getNextSafeSlug(slug, options.dryrun);
+  }
+}
+
+/**
+ * Parsing & Compiling
+ */
+class Parser {
+  constructor(options) {
+    this.options = options || defaults;
+    this.options.renderer = this.options.renderer || new Renderer();
+    this.renderer = this.options.renderer;
+    this.renderer.options = this.options;
+    this.textRenderer = new TextRenderer();
+    this.slugger = new Slugger();
+  }
+
+  /**
+   * Static Parse Method
+   */
+  static parse(tokens, options) {
+    const parser = new Parser(options);
+    return parser.parse(tokens);
+  }
+
+  /**
+   * Static Parse Inline Method
+   */
+  static parseInline(tokens, options) {
+    const parser = new Parser(options);
+    return parser.parseInline(tokens);
+  }
+
+  /**
+   * Parse Loop
+   */
+  parse(tokens, top = true) {
+    let out = '',
+      i,
+      j,
+      k,
+      l2,
+      l3,
+      row,
+      cell,
+      header,
+      body,
+      token,
+      ordered,
+      start,
+      loose,
+      itemBody,
+      item,
+      checked,
+      task,
+      checkbox,
+      ret;
+
+    const l = tokens.length;
+    for (i = 0; i < l; i++) {
+      token = tokens[i];
+
+      // Run any renderer extensions
+      if (this.options.extensions && this.options.extensions.renderers && this.options.extensions.renderers[token.type]) {
+        ret = this.options.extensions.renderers[token.type].call({ parser: this }, token);
+        if (ret !== false || !['space', 'hr', 'heading', 'code', 'table', 'blockquote', 'list', 'html', 'paragraph', 'text'].includes(token.type)) {
+          out += ret || '';
+          continue;
+        }
+      }
+
+      switch (token.type) {
+        case 'space': {
+          continue;
+        }
+        case 'hr': {
+          out += this.renderer.hr();
+          continue;
+        }
+        case 'heading': {
+          out += this.renderer.heading(
+            this.parseInline(token.tokens),
+            token.depth,
+            unescape(this.parseInline(token.tokens, this.textRenderer)),
+            this.slugger);
+          continue;
+        }
+        case 'code': {
+          out += this.renderer.code(token.text,
+            token.lang,
+            token.escaped);
+          continue;
+        }
+        case 'table': {
+          header = '';
+
+          // header
+          cell = '';
+          l2 = token.header.length;
+          for (j = 0; j < l2; j++) {
+            cell += this.renderer.tablecell(
+              this.parseInline(token.header[j].tokens),
+              { header: true, align: token.align[j] }
+            );
+          }
+          header += this.renderer.tablerow(cell);
+
+          body = '';
+          l2 = token.rows.length;
+          for (j = 0; j < l2; j++) {
+            row = token.rows[j];
+
+            cell = '';
+            l3 = row.length;
+            for (k = 0; k < l3; k++) {
+              cell += this.renderer.tablecell(
+                this.parseInline(row[k].tokens),
+                { header: false, align: token.align[k] }
+              );
+            }
+
+            body += this.renderer.tablerow(cell);
+          }
+          out += this.renderer.table(header, body);
+          continue;
+        }
+        case 'blockquote': {
+          body = this.parse(token.tokens);
+          out += this.renderer.blockquote(body);
+          continue;
+        }
+        case 'list': {
+          ordered = token.ordered;
+          start = token.start;
+          loose = token.loose;
+          l2 = token.items.length;
+
+          body = '';
+          for (j = 0; j < l2; j++) {
+            item = token.items[j];
+            checked = item.checked;
+            task = item.task;
+
+            itemBody = '';
+            if (item.task) {
+              checkbox = this.renderer.checkbox(checked);
+              if (loose) {
+                if (item.tokens.length > 0 && item.tokens[0].type === 'paragraph') {
+                  item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+                  if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
+                    item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
+                  }
+                } else {
+                  item.tokens.unshift({
+                    type: 'text',
+                    text: checkbox
+                  });
+                }
+              } else {
+                itemBody += checkbox;
+              }
+            }
+
+            itemBody += this.parse(item.tokens, loose);
+            body += this.renderer.listitem(itemBody, task, checked);
+          }
+
+          out += this.renderer.list(body, ordered, start);
+          continue;
+        }
+        case 'html': {
+          // TODO parse inline content if parameter markdown=1
+          out += this.renderer.html(token.text);
+          continue;
+        }
+        case 'paragraph': {
+          out += this.renderer.paragraph(this.parseInline(token.tokens));
+          continue;
+        }
+        case 'text': {
+          body = token.tokens ? this.parseInline(token.tokens) : token.text;
+          while (i + 1 < l && tokens[i + 1].type === 'text') {
+            token = tokens[++i];
+            body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+          }
+          out += top ? this.renderer.paragraph(body) : body;
+          continue;
+        }
+
+        default: {
+          const errMsg = 'Token with "' + token.type + '" type was not found.';
+          if (this.options.silent) {
+            console.error(errMsg);
+            return;
+          } else {
+            throw new Error(errMsg);
+          }
+        }
+      }
+    }
+
+    return out;
+  }
+
+  /**
+   * Parse Inline Tokens
+   */
+  parseInline(tokens, renderer) {
+    renderer = renderer || this.renderer;
+    let out = '',
+      i,
+      token,
+      ret;
+
+    const l = tokens.length;
+    for (i = 0; i < l; i++) {
+      token = tokens[i];
+
+      // Run any renderer extensions
+      if (this.options.extensions && this.options.extensions.renderers && this.options.extensions.renderers[token.type]) {
+        ret = this.options.extensions.renderers[token.type].call({ parser: this }, token);
+        if (ret !== false || !['escape', 'html', 'link', 'image', 'strong', 'em', 'codespan', 'br', 'del', 'text'].includes(token.type)) {
+          out += ret || '';
+          continue;
+        }
+      }
+
+      switch (token.type) {
+        case 'escape': {
+          out += renderer.text(token.text);
+          break;
+        }
+        case 'html': {
+          out += renderer.html(token.text);
+          break;
+        }
+        case 'link': {
+          out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+          break;
+        }
+        case 'image': {
+          out += renderer.image(token.href, token.title, token.text);
+          break;
+        }
+        case 'strong': {
+          out += renderer.strong(this.parseInline(token.tokens, renderer));
+          break;
+        }
+        case 'em': {
+          out += renderer.em(this.parseInline(token.tokens, renderer));
+          break;
+        }
+        case 'codespan': {
+          out += renderer.codespan(token.text);
+          break;
+        }
+        case 'br': {
+          out += renderer.br();
+          break;
+        }
+        case 'del': {
+          out += renderer.del(this.parseInline(token.tokens, renderer));
+          break;
+        }
+        case 'text': {
+          out += renderer.text(token.text);
+          break;
+        }
+        default: {
+          const errMsg = 'Token with "' + token.type + '" type was not found.';
+          if (this.options.silent) {
+            console.error(errMsg);
+            return;
+          } else {
+            throw new Error(errMsg);
+          }
+        }
+      }
+    }
+    return out;
+  }
+}
+
+/**
+ * Marked
+ */
+function marked(src, opt, callback) {
+  // throw error in case of non string input
+  if (typeof src === 'undefined' || src === null) {
+    throw new Error('marked(): input parameter is undefined or null');
+  }
+  if (typeof src !== 'string') {
+    throw new Error('marked(): input parameter is of type '
+      + Object.prototype.toString.call(src) + ', string expected');
+  }
+
+  if (typeof opt === 'function') {
+    callback = opt;
+    opt = null;
+  }
+
+  opt = merge({}, marked.defaults, opt || {});
+  checkSanitizeDeprecation(opt);
+
+  if (callback) {
+    const highlight = opt.highlight;
+    let tokens;
+
+    try {
+      tokens = Lexer.lex(src, opt);
+    } catch (e) {
+      return callback(e);
+    }
+
+    const done = function(err) {
+      let out;
+
+      if (!err) {
+        try {
+          if (opt.walkTokens) {
+            marked.walkTokens(tokens, opt.walkTokens);
+          }
+          out = Parser.parse(tokens, opt);
+        } catch (e) {
+          err = e;
+        }
+      }
+
+      opt.highlight = highlight;
+
+      return err
+        ? callback(err)
+        : callback(null, out);
+    };
+
+    if (!highlight || highlight.length < 3) {
+      return done();
+    }
+
+    delete opt.highlight;
+
+    if (!tokens.length) return done();
+
+    let pending = 0;
+    marked.walkTokens(tokens, function(token) {
+      if (token.type === 'code') {
+        pending++;
+        setTimeout(() => {
+          highlight(token.text, token.lang, function(err, code) {
+            if (err) {
+              return done(err);
+            }
+            if (code != null && code !== token.text) {
+              token.text = code;
+              token.escaped = true;
+            }
+
+            pending--;
+            if (pending === 0) {
+              done();
+            }
+          });
+        }, 0);
+      }
+    });
+
+    if (pending === 0) {
+      done();
+    }
+
+    return;
+  }
+
+  function onError(e) {
+    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+    if (opt.silent) {
+      return '<p>An error occurred:</p><pre>'
+        + escape(e.message + '', true)
+        + '</pre>';
+    }
+    throw e;
+  }
+
+  try {
+    const tokens = Lexer.lex(src, opt);
+    if (opt.walkTokens) {
+      if (opt.async) {
+        return Promise.all(marked.walkTokens(tokens, opt.walkTokens))
+          .then(() => {
+            return Parser.parse(tokens, opt);
+          })
+          .catch(onError);
+      }
+      marked.walkTokens(tokens, opt.walkTokens);
+    }
+    return Parser.parse(tokens, opt);
+  } catch (e) {
+    onError(e);
+  }
+}
+
+/**
+ * Options
+ */
+
+marked.options =
+marked.setOptions = function(opt) {
+  merge(marked.defaults, opt);
+  changeDefaults(marked.defaults);
+  return marked;
+};
+
+marked.getDefaults = getDefaults;
+
+marked.defaults = defaults;
+
+/**
+ * Use Extension
+ */
+
+marked.use = function(...args) {
+  const extensions = marked.defaults.extensions || { renderers: {}, childTokens: {} };
+
+  args.forEach((pack) => {
+    // copy options to new object
+    const opts = merge({}, pack);
+
+    // set async to true if it was set to true before
+    opts.async = marked.defaults.async || opts.async;
+
+    // ==-- Parse "addon" extensions --== //
+    if (pack.extensions) {
+      pack.extensions.forEach((ext) => {
+        if (!ext.name) {
+          throw new Error('extension name required');
+        }
+        if (ext.renderer) { // Renderer extensions
+          const prevRenderer = extensions.renderers[ext.name];
+          if (prevRenderer) {
+            // Replace extension with func to run new extension but fall back if false
+            extensions.renderers[ext.name] = function(...args) {
+              let ret = ext.renderer.apply(this, args);
+              if (ret === false) {
+                ret = prevRenderer.apply(this, args);
+              }
+              return ret;
+            };
+          } else {
+            extensions.renderers[ext.name] = ext.renderer;
+          }
+        }
+        if (ext.tokenizer) { // Tokenizer Extensions
+          if (!ext.level || (ext.level !== 'block' && ext.level !== 'inline')) {
+            throw new Error("extension level must be 'block' or 'inline'");
+          }
+          if (extensions[ext.level]) {
+            extensions[ext.level].unshift(ext.tokenizer);
+          } else {
+            extensions[ext.level] = [ext.tokenizer];
+          }
+          if (ext.start) { // Function to check for start of token
+            if (ext.level === 'block') {
+              if (extensions.startBlock) {
+                extensions.startBlock.push(ext.start);
+              } else {
+                extensions.startBlock = [ext.start];
+              }
+            } else if (ext.level === 'inline') {
+              if (extensions.startInline) {
+                extensions.startInline.push(ext.start);
+              } else {
+                extensions.startInline = [ext.start];
+              }
+            }
+          }
+        }
+        if (ext.childTokens) { // Child tokens to be visited by walkTokens
+          extensions.childTokens[ext.name] = ext.childTokens;
+        }
+      });
+      opts.extensions = extensions;
+    }
+
+    // ==-- Parse "overwrite" extensions --== //
+    if (pack.renderer) {
+      const renderer = marked.defaults.renderer || new Renderer();
+      for (const prop in pack.renderer) {
+        const prevRenderer = renderer[prop];
+        // Replace renderer with func to run extension, but fall back if false
+        renderer[prop] = (...args) => {
+          let ret = pack.renderer[prop].apply(renderer, args);
+          if (ret === false) {
+            ret = prevRenderer.apply(renderer, args);
+          }
+          return ret;
+        };
+      }
+      opts.renderer = renderer;
+    }
+    if (pack.tokenizer) {
+      const tokenizer = marked.defaults.tokenizer || new Tokenizer();
+      for (const prop in pack.tokenizer) {
+        const prevTokenizer = tokenizer[prop];
+        // Replace tokenizer with func to run extension, but fall back if false
+        tokenizer[prop] = (...args) => {
+          let ret = pack.tokenizer[prop].apply(tokenizer, args);
+          if (ret === false) {
+            ret = prevTokenizer.apply(tokenizer, args);
+          }
+          return ret;
+        };
+      }
+      opts.tokenizer = tokenizer;
+    }
+
+    // ==-- Parse WalkTokens extensions --== //
+    if (pack.walkTokens) {
+      const walkTokens = marked.defaults.walkTokens;
+      opts.walkTokens = function(token) {
+        let values = [];
+        values.push(pack.walkTokens.call(this, token));
+        if (walkTokens) {
+          values = values.concat(walkTokens.call(this, token));
+        }
+        return values;
+      };
+    }
+
+    marked.setOptions(opts);
+  });
+};
+
+/**
+ * Run callback for every token
+ */
+
+marked.walkTokens = function(tokens, callback) {
+  let values = [];
+  for (const token of tokens) {
+    values = values.concat(callback.call(marked, token));
+    switch (token.type) {
+      case 'table': {
+        for (const cell of token.header) {
+          values = values.concat(marked.walkTokens(cell.tokens, callback));
+        }
+        for (const row of token.rows) {
+          for (const cell of row) {
+            values = values.concat(marked.walkTokens(cell.tokens, callback));
+          }
+        }
+        break;
+      }
+      case 'list': {
+        values = values.concat(marked.walkTokens(token.items, callback));
+        break;
+      }
+      default: {
+        if (marked.defaults.extensions && marked.defaults.extensions.childTokens && marked.defaults.extensions.childTokens[token.type]) { // Walk any extensions
+          marked.defaults.extensions.childTokens[token.type].forEach(function(childTokens) {
+            values = values.concat(marked.walkTokens(token[childTokens], callback));
+          });
+        } else if (token.tokens) {
+          values = values.concat(marked.walkTokens(token.tokens, callback));
+        }
+      }
+    }
+  }
+  return values;
+};
+
+/**
+ * Parse Inline
+ * @param {string} src
+ */
+marked.parseInline = function(src, opt) {
+  // throw error in case of non string input
+  if (typeof src === 'undefined' || src === null) {
+    throw new Error('marked.parseInline(): input parameter is undefined or null');
+  }
+  if (typeof src !== 'string') {
+    throw new Error('marked.parseInline(): input parameter is of type '
+      + Object.prototype.toString.call(src) + ', string expected');
+  }
+
+  opt = merge({}, marked.defaults, opt || {});
+  checkSanitizeDeprecation(opt);
+
+  try {
+    const tokens = Lexer.lexInline(src, opt);
+    if (opt.walkTokens) {
+      marked.walkTokens(tokens, opt.walkTokens);
+    }
+    return Parser.parseInline(tokens, opt);
+  } catch (e) {
+    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+    if (opt.silent) {
+      return '<p>An error occurred:</p><pre>'
+        + escape(e.message + '', true)
+        + '</pre>';
+    }
+    throw e;
+  }
+};
+
+/**
+ * Expose
+ */
+marked.Parser = Parser;
+marked.parser = Parser.parse;
+marked.Renderer = Renderer;
+marked.TextRenderer = TextRenderer;
+marked.Lexer = Lexer;
+marked.lexer = Lexer.lex;
+marked.Tokenizer = Tokenizer;
+marked.Slugger = Slugger;
+marked.parse = marked;
+
+const options = marked.options;
+const setOptions = marked.setOptions;
+const use = marked.use;
+const walkTokens = marked.walkTokens;
+const parseInline = marked.parseInline;
+const parse = marked;
+const parser = Parser.parse;
+const lexer = Lexer.lex;
+
+export { Lexer, Parser, Renderer, Slugger, TextRenderer, Tokenizer, defaults, getDefaults, lexer, marked, options, parse, parseInline, parser, setOptions, use, walkTokens };