I'm using Playwright in "library mode". The typical approach is: create Playwright instance, launch browser, create context, create page, go to URL.
But there are also ConnectAsync and ConnectOverCDPAsync which allow connection to an existing browser.
When would I do that? The docs don't explain in which cases I need to connect to an existing browser rather than doing it the way shown in the "getting started" docs? Do I get extra functionality when connecting to an existing browser?
I use an existing browser session and connect playwright library with it. I use it for scraping, sometimes I have to manually change some setting in the browser, leave it open and then run my playwright script which then takes over the existing browser session.
I first start a chrome browser with a batch file
cd C:\Program Files\Google\Chrome\Application
chrome.exe --remote-debugging-port=9222 --user-data-dir="C:\Users\Demo\chromepythondebug"
and then add connect playwright with the chrome browser session
from playwright.sync_api import sync_playwright, Playwright
playwright = sync_playwright().start()
chromium = playwright.chromium
browser = playwright.chromium.connect_over_cdp("http://localhost:9222")
default_context = browser.contexts[0]
page = default_context.pages[0]
page.goto("https://www.google.com/")