bulk-clean-html.js

var fs = require('fs')
var cleaner = require('clean-html')

function readFiles(dir, onFileContent, onError) {
  fs.readdir(dir, function (err, filenames) {
    if (err) {
      onError(err)
      return
    }
    filenames.forEach(function (filename) {
      fs.readFile(dir + filename, 'utf-8', function (err, content) {
        if (err) {
          onError(err)
          return
        }
        onFileContent(filename, content)
      })
    })
  })
}

var data = {}
var options = {
  'add-remove-tags': ['html', 'head', 'meta', 'style', 'body', 'span', 'div'],
  'remove-empty-tags': ['div', 'p'],
  'replace-nbsp': true,
  'add-remove-attributes': ['class', 'id']
}
readFiles('source\\', function (filename, content) {
  data[filename] = content

  console.log(filename)

  cleaner.clean(content, options, function (html) {
    fs.writeFile('output\\' + filename, html, function (err) {
      if (err) {
        console.log(err)
        return
      }
    })
  })
}, function (err) {
  throw err
})