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Dialogs

Playwright can interact with the web page dialogs such as alert, confirm, prompt as well as beforeunload confirmation.

alert(), confirm(), prompt() dialogs​

By default, dialogs are auto-dismissed by Playwright, so you don't have to handle them. However, you can register a dialog handler before the action that triggers the dialog to either dialog.accept() or dialog.dismiss() it.

page.on("dialog", lambda dialog: dialog.accept())
page.get_by_role("button").click()
note

page.on("dialog") listener must handle the dialog. Otherwise your action will stall, be it locator.click() or something else. That's because dialogs in Web are modals and therefore block further page execution until they are handled.

As a result, the following snippet will never resolve:

danger

WRONG!

page.on("dialog", lambda dialog: print(dialog.message))
page.get_by_role("button").click() # Will hang here
note

If there is no listener for page.on("dialog"), all dialogs are automatically dismissed.

beforeunload dialog​

When page.close() is invoked with the truthy run_before_unload value, the page runs its unload handlers. This is the only case when page.close() does not wait for the page to actually close, because it might be that the page stays open in the end of the operation.

You can register a dialog handler to handle the beforeunload dialog yourself:

def handle_dialog(dialog):
    assert dialog.type == 'beforeunload'
    dialog.dismiss()

page.on('dialog', lambda: handle_dialog)
page.close(run_before_unload=True)