Version: Next


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 accept or decline it.

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

page.on("dialog") listener must handle the dialog. Otherwise your action will stall, be it, **kwargs), page.evaluate(expression, **kwargs) or any other. That's because dialogs in Web are modal and block further page execution until they are handled.

As a result, following snippet will never resolve:

:::warn WRONG! :::

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

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

API reference#

beforeunload dialog#

When page.close(**kwargs) is invoked with the truthy run_before_unload value, it page runs its unload handlers. This is the only case when page.close(**kwargs) 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'
page.on('dialog', lambda: handle_dialog)