// OBJECTS

user: {
  email: '',
  password: ''
}

formFields: [
  { name: 'email', type: 'text', required: true },
  { name: 'password', type: 'password', required: true }
]

// HTML

<input :type="getPropType($key)"

// FUNCTION

getPropType (key) {
  console.log(this.fields)
  console.log(key)
  return this.fields.map(field => {
    if (field.name === key) return field.type
  })
}