format-html-fragment-tidy.js

const libtidy = require('libtidy')
let options = {
  indent: true,
  indentSpaces: 2,
  markup: true,
  doctype: 'omit',
  showBodyOnly: true
}
const fs = require('fs')

const html = fs.readFileSync('./test.html').toString()

libtidy.tidyBuffer(html, options, (errlog, output) => {
  if (errlog) {
    console.log(errlog)
  }
  console.log(output)
  fs.writeFileSync(`${Date.now()}-cleaned-tidy.html`, output.output.toString())
})