How to run Selenium Python in mobile emulation mode?

Question

How do you use Selenium to open Chrome in mobile emulation mode?

According to these docs you should be able to start Chrome in the mobile emulation mode you can normally access through the Inspect panel, with:

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
mobile_emulation = {
    "deviceMetrics": { "width": 360, "height": 640, "pixelRatio": 3.0 },
    "userAgent": "Mozilla/5.0 (Linux; Android 4.2.1; en-us; Nexus 5 Build/JOP40D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19" }
chrome_options = Options()
chrome_options.add_experimental_option("mobileEmulation", mobile_emulation)
driver = webdriver.Chrome(chrome_options=chrome_options)

However, testing this with the most recent version of Chrome and ChromeDriver shows it doesn't work. It opens Chrome just fine, but it's in normal desktop mode. All the mobile options appear to be completely ignored.

I can still enable mobile emulation manually in the browser Selenium creates, but that doesn't help me for automating a test.

Try with driver = webdriver.Chrome(options=chrome_options) — Tarun Lalwani
– Tarun Lalwani, Commented Apr 2, 2021 at 18:29
its not ignored please add more information on what you mean by its ignored , the screen resolution , the touch everything is simulated . Please see the answer below — PDHide
– PDHide, Commented Apr 2, 2021 at 23:07

PDHide · Accepted Answer · 2021-04-02 23:21:43Z

2

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="test">TEST</button>

<script type="text/javascript">
        $('#test').on('touchend click',function(e){
  if(e.type=='click')
    alert('click triggered');
  else
    alert('touch triggered');
});
    </script>

copy above html to a file and open it from selenium.

Now run the code and you can see that you get touch triggered alert and not click triggered:

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
mobile_emulation = {
    "deviceMetrics": {"width": 360, "height": 640, "pixelRatio": 3.0},
    "userAgent": "Mozilla/5.0 (Linux; Android 4.2.1; en-us; Nexus 5 Build/JOP40D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19"}


chrome_options = webdriver.ChromeOptions()

chrome_options.add_experimental_option(
    "mobileEmulation", mobile_emulation)

driver = webdriver.Chrome(options=chrome_options)

driver.get(
    "file:///C:/Users/prave/Desktop/push.html")

driver.find_element_by_tag_name("button").click()
input()

Output:

The browser looks like normal browser but the screen resolution will be of mobile device when you open any url usign driver.get("")

edited Apr 2, 2021 at 23:21

answered Apr 2, 2021 at 21:36

PDHide

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4 Comments

Cerin Over a year ago

Yes, I know you have to call drive.get(). I've written hundreds of Selenium tests. That's not the problem. It opens a regular browser, not one in a mobile resolution.

PDHide Over a year ago

@Cerin if you have written 100s of selenium you should know it will emulate the screen size only and that's exactly what the code does . It sets the screen size , it's as per the core given in chrome driver documentation

PDHide Over a year ago

Try going to youtube.com you can see that it gets redirected to m.youtube

PDHide Over a year ago

once you accept the consent screen , it takes you to m.youtube

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