get cookie used headless chrome.

getCookie.js

const Chromy = require('chromy')
const fs = require('fs')

let chromy = new Chromy()

async function main () {
  chromy.chain()
    .goto('https://example.com/login.php')
    .type('#username', 'username')
    .type('#password', 'password')
    .click('#submit', {waitLoadEvent: true})
    .getCookies()
    .result((cookie) => {
      fs.writeFileSync('./cookies.json', JSON.stringify(cookie))
      console.log("save cookie!")
    })
    .end()
    .then(_ => chromy.close())
    .catch(e => {
      console.log(e)
      chromy.close()
    })
}

main()