Python and Selenium - Disable alert when leaving page

Question

Using Python 3 and Chromedriver.

Suppose an automated python program is surfing the web, fetching stuff from different sources.

Answer 1

Disable the alert on before unload:

def super_get(url):
    driver.get(url)
    driver.execute_script("window.onbeforeunload = function() {};")

And now use super_get(whatever_url) insetad of the standard driver.get(whatever_url)

Disable all alerts in page:

def super_get(url):
    driver.get(url)
    driver.execute_script("window.alert = function() {};")

Hope it helps somebody. Cheers.

Answer 2

Goal Get all listeners by getEventListeners(window)['beforeunload'] and remove them all.

Step1. Put DOMDebugger.getEventListeners to window['getEventListeners']

VB.NET

Dim myChromeDriver as ChromeDriver = getMyDriver()
myChromeDriver.ExecuteChromeCommand("Runtime.evaluate", New Dictionary(Of String, Object)() From {
{"expression", "window['getEventListeners'] = getEventListeners;"},
{"includeCommandLineAPI", True}})

We don't need the result value of this Command.

includeCommandLineAPI=True is required or it will throw exception because getEventListeners is an CommandLineAPI that is undefined in script execution context

Step2. Remove all listeners

Dim jsCmd As String = "var eventlistener = window['getEventListeners'](window)['beforeunload'][0];" &
"    window.removeEventListener('beforeunload', " &
"    eventlistener.listener, " &
"    eventlistener.useCapture); "
myChromeDriver.ExecuteScript(jsCmd)

Run this script until getEventListeners(window)['beforeunload'] is empty.

This script will throw exception when all listeners removed, you can fix it.

Finally

oDriver.Navigate.GoToUrl("https://www.google.com")

The "Are you sure.." alert should disappear.