Yes, I understand your idea. I will try that and let you know. thank you

If I redirect before the fetch, is not it the Paypal popup gone? because all the fetches are happening from Paypal popup actions? (once the PP popup opens it creates the 'order fetch' and after login and payment approval the 'capture fetch')

I modified the code, now you can check the whole onApprove: function which contains 'order_creation' and then 'order_capture'. I can not directly redirect once the onApprove function calls coz it does 2 fetch() calls. (also both order creation and capture happen while the Paypal popup is active)

As a result, every function will be called multiple(as many payment methods as you have) times!!

if I call those functions inside the paypal.Buttons({...}) will be looped multiple times. the same object will be created multiple times!

Yes, know this. for form submit this is fine. but i need auto-login without submitting the form. For example, I have a URL with some hash code that would auto-login to contao 4. So, no form submit but another solution.