Simple search in Express and Mongoose

// html
<form id="searchForm" action="/results" method="POST" enctype="multipart/form-data">
  <input type="text" id="search" name="search" placeholder="search" />
</form>


// ExpressJS
app.post('/results', (req, res) => {
  const form = new formidable.IncomingForm()

  form.parse(req, (err, field) => {
    if (err) console.log(err)

    const rawRequest = field.search
    const keyword = rawRequest.toLowerCase().trim().replace(/\W+\D+/gim, "")

    // in MongoDB you need to have 'keywords' field
    var query = contact.find({ keywords: { $regex: keyword } })
    query.exec(function(err, contact) {
      if (err) console.log(err)

      res.render('results.html', {
        contacts: contact
      })
    })
  })
})