gistfile1.txt

new RegExp(
      [
        '<',
        '(/?)', // 2 - is closing
        '([-:\\w]+)', // 3 - name
        '((?:\\s+[-\\w]+(?:', '=', '(?:' +
          '\\w+|' +
          '"[^"]*"|' +
          '\'[^\']*\'))?)*)', // 4 - attributes
        '(/?)', // 5 - is self-closing
        '>'
      ].join('\\s*')
    )