Puppeteer vs. Selenium

Question

I am trying to parse banking website and I have the whole workflow recorded in Selenium and everything works. Due to inability to persist cookies between sessions while using Selenium Webdriver (Cookies cannot be loaded - "missing name exception") I moved to puppeteer. Line by line it went good until I got the following lines:

In selenium:

await driver.findElement(By.css(".buttons:nth-child(4)")).click()

and in puppeteer

await page.frames()[1].click('.buttons:nth-child(4)');

does not work.

What is funny though:

await page.frames()[1].waitForSelector('.buttons:nth-child(4)');

does not throw exception so element is present on the page.

Answer 1

page.frames() will return a promise. You have to await almost everything:

let frames = await page.frames()
await frames[1].click('.buttons:nth-child(4)');