How to click on a pop up dialog in Playwright?

To handle browser dialog pop ups in Playwright like this one:

cart clear alert as seen on web-scraping.dev/cart

We need to attach a dialog handler to the page object which can be done using page.on("dialog", handler) method:

from playwright.sync_api import sync_playwright

with sync_playwright() as p:
    browser = p.chromium.launch(headless=False)
    page = browser.new_page()

    # create a dialog handler that will check message text and press yes/no
    def handle_dialog(dialog):
        if "clear your cart" in dialog.message:
            print(f'clicking "Yes" to {dialog.message}')
            dialog.accept()  # press "Yes"
        else:
            dialog.dismiss()  # press "No"
    page.on("dialog", handle_dialog)

    # to test this, let's try web-scraping.dev cart system: 
    # add something to cart
    page.goto("https://web-scraping.dev/product/1")
    page.click(".add-to-cart")
    # try clearing cart which raises a dialog that says "are you sure you want to clear your cart?"
    page.goto("https://web-scraping.dev/cart")
    page.wait_for_selector(".cart-full .cart-item")
    page.click(".cart-full .cart-clear")

    print(f'items in cart: {page.query_selector(".cart-item .cart-title")}')  # should be None

In the example above, attach a dialog handler to our page object which checks whether the dialog message contains the text "clear your cart" and if so, it clicks "Yes" to clear the cart. Otherwise, it clicks "No" to cancel the dialog.

Question tagged: Playwright, Python

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