I have a website I want to automate some actions on but the page is generated by 2 JavaScript files and is defined like this in the html:

<script src="/build/runtime.js"></script><script src="/build/app.js"></script>

runtime.js is about 70 lines and app.js is about 40k lines... I have no idea how to read the code as I don't know any JavaScript and my Pyton knowledge is a mere atom more ;)

I'd share the particular site but the page is behind a login. So I've managed to get to the page using 2 different methods but can't find a way to press buttons within this next page generated by the JS.

Method 1 - Requests & BeautifulSoup but got stuck on the JS bit so switched to method2.

import requests
from bs4 import BeautifulSoup

# Site & creds
LOGIN_URL = 'https://website.com/login'
USERNAME = 'user'
PASSWORD = 'pass'

# Pretend to be browser
headers = {
    'accept': 'text/html,application/xhtml+xml,application/xml',
    'user-agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36'
}
# Start session
session = requests.session()
# Get login page
response = session.get(LOGIN_URL, headers=headers, verify=False)
# Get csrf token
soup = BeautifulSoup(response.content, 'html.parser')
csrf_token = (soup.find(id="login_form__token")["value"])
# Set creds with csfr token
payload = {
    'login_form[username]': USERNAME,
    'login_form[password]': PASSWORD,
    'login_form[login]': '',
    'login_form[_token]': csrf_token
}
# Login & do something else with cookies I don't understand
response = session.post(LOGIN_URL, data=payload, verify=False)
response = session.get('https://website.com/pageIWant', verify=False)

soup = BeautifulSoup(response.content, 'html.parser')
print(soup.prettify())

Method 2 - Selenium & ChromeDriver

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By

options = Options()
options.headless = True
options.add_argument("--window-size=1920,1200")
options.add_argument('--disable-gpu')
options.add_argument('--disable-software-rasterizer')

driver = webdriver.Chrome(options=options, executable_path='chromedriver.exe')
driver.get("https://website.com/login")

driver.find_element_by_id("login_form_username").send_keys('user')
driver.find_element_by_id("login_form_password").send_keys('pass')
driver.find_element_by_id("login_form_login").click()

driver.get("https://website.com/pageIWant")

html = driver.page_source
print(html)

So I thought method 2 would make things easier but pretty much stuck at the same point. The page generated that I want contains buttons I'd need to press in order to access downstream pages. Read a lot about accessing elements but can't see anything within this 40k worth of JS jibberish. Where is a good place to start?