For my tests, I would like to login to this page: https://www.ebay-kleinanzeigen.de/m-einloggen.html
When first requested, this page returns a page like the following:
<html><head><meta charset="utf-8">
<script>
function(){/* some logic*/}();
</script>
</head><body></body></html>
This script has functions and an anonymous function that should be executed when the browser loads the page.
In a normal browser, this function fires a xhr request (where the server will set cookies) and then reloads the same page, that thanks to the cookies will contain the login form.
To see this in action, open a private tab in your favorite browser, open the dev tools, set the networking logs to persist and visit the page. The first network requests will look like this: 
Using the following Puppeteer script, the browser doesn't execute the anonymous function and gets stuck waiting for the login form, that never appears:
import puppeteer from 'puppeteer';
const main = async () => {
try {
const browser = await puppeteer.launch({devtools: true});
const page = await browser.newPage();
await page.goto('https://www.ebay-kleinanzeigen.de');
await page.waitForSelector('#login-form', { visible: true });
await page.screenshot({path: 'login.png', fullPage: true})
await browser.close();
} catch (e) {
console.log('error',e);
}
}
main();
I can't use page.evaluate because the content of the function is dynamically created by the server.
Is there a way to let this anonymous function get executed at page load?
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