How to disable a "Reload site? Changes you made may not be saved" popup for (python) selenium tests in chrome?

Question

I am running automated (python) selenium tests on a chrome browser, and sometimes when a page is reloaded a popup appears on the screeen:

Is it possible to configure the chrome selenium browser in such a way, that this popup does not appear? If so, how to do that? Or are there other ways to supress this popup? Or to accept it?

Solution 1

This popup with text as Reload site? Changes you made may not be saved is the implementation of onbeforeunload property of WindowEventHandlers

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onbeforeunload

The onbeforeunload property of the WindowEventHandlers mixin is the EventHandler for processing beforeunload events. These events fire when a window is about to unload its resources. At this point, the document is still visible and the event is still cancelable.

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Solution

There are different strategies available to handle this popup.

• Chrome solution: Using --disable-popup-blocking through ChromeOptions():

  from selenium import webdriver
  
  options.add_argument("--disable-popup-blocking")
  driver=webdriver.Chrome(chrome_options=options, executable_path=/path/to/chromedriver')
  

• Firefox solution: Using dom.disable_beforeunload through FirefoxProfile():

  from selenium import webdriver
  profile = webdriver.FirefoxProfile()
  profile.set_preference("dom.disable_beforeunload", True)
  driver = webdriver.Firefox(firefox_profile = profile)
  

• Cross Browser solution: As a Cross Browser solution, you can disable this dialog invoking the executeScript() to set window.onbeforeunload as function() {}; and you can use the following solution:

  driver.execute_script("window.onbeforeunload = function() {};")
  

• JQuery based solution:

  $I->executeJS( "window.onbeforeunload = null" );
  

You can find a relevant discussion in How to handle below Internet Explorer popup “Are you sure you want to leave this page?” through Selenium

Solution 2

I know this doesn't answer the suppression part of the question, but..

Try this piece of code for accepting the popup:

driver.SwitchTo().Alert().Accept();

Comments

[Alex]

Yes I guess I will use this suggestion. But the alert pops up only sometimes.

[RegCent]

You could try adding "Try Except" block to try to switch to the alert window

[Alex]

I just realized I have this flag --disable-popup-blocking already for Chrome. However, it does not seem to work properly. I still get the popup from time to time (repeating the exact same webpage).

[undetected Selenium]

Did you tryout the Cross Browser solution? Can you get me a status please?

[Alex]

when do I have to execute the script? Just one time after I created the driver? Each time for a new page?

[Alex]

Popup still appears sometimes.

[undetected Selenium]

Please ignore my previous comment. Whereever you are browsing away from a page and this popup appears you need to add this line to get rid of it.