htmlparser2.coffee

htmlParser = require('htmlparser2')

result = ''
selfClosingTags = ['img', 'br', 'hr']

parser = new htmlParser.Parser(
  onopentag: (name, attribs) =>
    result += "<#{name}"
    for attr, val of attribs
      if val.length
        result += "=\"#{val}\""
    if selfClosingTags.indexOf(name) != -1
      result += ' />'
    else
      result += '>'
  ontext: (text) =>
    result += text.replace(/(#\w+)/, '<span class="entry-hashtag">$1</span>')

  onclosetag: (name) =>
    if selfClosingTags.indexOf(name) != -1
      result += "</#{name}>"
)

parser.write("<div>\n<font size=\"10\" data-key>これはテストです。 #hash</font>\n<br /></div>")
parser.end()
console.log(result)