23

The following code to resize a selenium chrome window does not work:

driver.set_window_size(1920, 1080)
time.sleep(5)
size = driver.get_window_size()
print("Window size: width = {}px, height = {}px.".format(size["width"], size["height"]))

From which the output is:

Window size: width = 1044px, height = 788px

I've also tried using options to set the window size on driver creation (and lots of other things, seem comments below), but can't get it to work either:

options.add_argument("--window-size=1920,1080")

I am using selenium 3.14.0, chrome driver version 72.0.3626.109 and running in background / headless mode: I am literally needing to run my code in background, meaning it launches automatically in the background. I think there is a subtle difference between headless, which when launched is associated with a particular user, and background, which is also headless but may not be associated with a particular user and may have other idiosyncrasies - I'm starting to think this may be part of my issue.

I'd like to get chrome driver to work because firefox does not run in the background (which I need), and ie is a pain.

I want to figure this out because I can't see an element I need to click when the window is so small.

undetected Selenium
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David Miller
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  • Why not do a scroll to ? – QHarr Mar 05 '19 at 23:13
  • I've tried this: driver.execute_script("arguments[0].scrollIntoView();", button2) where button2 is the hidden button at the bottom of a menu drop down list, and that does not work either. – David Miller Mar 06 '19 at 00:01
  • Are you clicking the dropdown to open it before trying to click the desired element? The window should scroll for you once the element is visible. If that doesn't work, you can always click the element using JS. It's not a user scenario (because users can't click things they can't see) but if you aren't trying to automate a user scenario or are really stuck with no other options, that should work. – JeffC Mar 06 '19 at 00:36

4 Answers4

34

A bit unclear why and exactly where you are stuck. Possibly the extra . as in height = {}px. is creating the chaos. Perhaps along with -headless argument I am able to set/retrieve the Chrome browser Window Size as follows:

  • Code Block:

    from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.add_argument("--headless")
options.add_argument("window-size=1400,600")
driver = webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe', service_args=["--log-path=./Logs/DubiousDan.log"])
driver.get("http://google.com/")
print ("Headless Chrome Initialized")
print(driver.get_window_size())
driver.set_window_size(1920, 1080)
size = driver.get_window_size()
print("Window size: width = {}px, height = {}px".format(size["width"], size["height"]))
driver.quit()

  • Console Output:

    Headless Chrome Initialized
{'width': 1400, 'height': 600}
Window size: width = 1920px, height = 1080px

tl; dr

You find a couple of relevant discussion on window size in:

undetected Selenium
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8

Instead of 

options.add_argument("--window-size=1920,1080")

Can you please try this.

options.add_argument('window-size=1920x1080');

OR

options.add_argument("--start-maximized")
KunduK
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    I have already tried the first and third options with no luck. I just tried the middle option and it doesn't work either. My window is still too small, and I can't see the element I need to click. Curious why this is so complicated / not working for me. Thanks for your help. – David Miller Mar 06 '19 at 00:12
6

So I finally figured out what the problem is: Running Windows task scheduler with option 'run whether user is logged on or not' only opens a small browser (1024x768) that CANNOT be resized, even with all the great suggestions being offered here.

See the same issue resolved here: screen resolution in mode "Run whether user is logged on or not", in windows task scheduler

So the less than ideal workaround is to only run when user is logged on.

TylerH
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David Miller
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4

You can use set_window_size function in webdriver class:

driver.set_window_size(width, height)

for ex:

driver.set_window_size(800, 600)
Mahsum Akbas
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