no-full-cookie.js

const axios = require('axios').default
const fetch = require('node-fetch')
const request = require('request')
const FormData = require('form-data')

const ua = require('useragent-generator')

const userAgent = ua.chrome({ version: '72.0.3626.121', os: 'Windows NT 10.0' })
const url = 'https://mangadex.org/ajax/actions.ajax.php?function=login&nojs=1'
const username = 'some-username'
const password = 'some-password'

const form = new FormData()

form.append('login_username', username)
form.append('login_password', password)
form.append('remember_me', '1')

request.post({
  url,
  method: 'POST',
  formData: {
    'login_username': username,
    'login_password': password,
    'remember_me': '1'
  },
  headers: {
    'User-Agent': userAgent
  }
}, (err, res) => {
  if (err) console.log('error,', err)
  console.log('request', res.headers)
})

fetch(url, {
  method: 'POST',
  body: form,
  headers: {
    'Content-Type': `multipart/form-data; boundary=${form._boundary}`,
    'User-Agent': userAgent
  }
})
.then(res => {
  console.log('fetch', res.headers.raw())
})
axios.post(url, form, {
  headers: {
    'Content-Type': `multipart/form-data; boundary=${form._boundary}`,
    'User-Agent': userAgent
  }
})
  .then(res => {
    console.log('axios', res.headers)
  })