[Question] Attaching playwright to an existing browser window?

Hey,

First of all thank you for this wonderful library ❤️

I’m working on a feature for playwright recorder to let you more easily run playwright tests from the browser.

I want to attach playwright to a context that is already running (opened with ChromeDriver if that matters):

    const browser = await playwright.chromium.connect({
        wsEndpoint: cdpUrl,
    });
    const contexts = browser.contexts(); // empty

    // how do I get the existing already open pages?

    const context = await browser.newContext({viewport: null })
    const pages = await context.pages(); // empty

I checked puppeteer and it was easy to get working like this:

    const browser = await puppeteer.connect({
        browserWSEndpoint: cdpUrl,
        defaultViewport: null, // disable puppeteer resize
        product: 'chrome', 
    });
    const pages = await browser.pages();

    const page = last(pages);

Is there an official method to obtain existing browser contexts?

[pavelfeldman]

I’ll tentatively close this as won’t fix. It is essential for Playwright to be able to run the browser in the controlled environment. There are a lot of good hints here on how this can be worked around, but it is unlikely that they get into the official Playwright API.

[benjamingr]

I’ll try to describe the use case:

• Imagine I already have a large codebase written in Selenium.
• I would like to author new features with playwright instead or to leverage a library written in playwright.
• When launching the selenium test I get the debugger URL from ChromeDriver after launching my browser and connect playwright to it.
• I can now author new features with Playwright - and for example port the function that logs me into the website being tested from selenium to playwright.

The feature I’m asking for enables mixing and matching playwright with selenium or puppeteer more easily. I specifically need it to run the playwright playground (mentioned above) on tabs controlled inside ChromeDriver