app.js

$('#save-button').on('click', function () {
  const data = [
     ['name', document.getElementById('name-input').value],
     ['email', document.getElementById('email-input').value],
     ['age', document.getElementById('age-input').value]
  ]

  var csv = 'id,value'
  data.forEach(function(row) {
    csv += '\n'
    csv += row.join(',')
  })

  const hiddenElement = document.createElement('a')
  hiddenElement.href = 'data:text/csvcharset=utf-8,' + encodeURI(csv)
  hiddenElement.target = '_blank'
  hiddenElement.download = 'meta_'+Date.now()+'.csv'
  hiddenElement.click()
})