Can we Zoom the browser window in python selenium webdriver?

Question

I am trying to ZOOM IN and ZOOM OUT the Chrome( selenium webdriver) only using keyboard. I have tried --

from selenium.webdriver.common.keys import Keys
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Answer 1

Yes, you can invoke the Chrome driver to zoom without having to use CSS. There are methods packaged into the Chrome DevTools Protocol Viewer, one being Input.synthesizePinchGesture aka zoom in/out.

For ease of use, with regards to the DevTools Protocol API, we will use a class called MyChromeDriver with webdriver.Chrome as a metaclass and a new method for sending these commands to Chrome:

# selenium
from selenium import webdriver
# json
import json

class MyChromeDriver(webdriver.Chrome):
    def send_cmd(self, cmd, params):
        resource = "/session/%s/chromium/send_command_and_get_result" % self.session_id
        url = self.command_executor._url + resource
        body = json.dumps({'cmd':cmd, 'params': params})
        response = self.command_executor._request('POST', url, body)
        return response.get('value')

1. Setup our webdriver and get some page:

webdriver = MyChromeDriver()
webdriver.get("https://google.com")

2. Send Chrome the Input.synthesizePinchGesture command along with its parameters via our new method send_cmd:

webdriver.send_cmd('Input.synthesizePinchGesture', {
                        'x': 0,
                        'y': 0,
                        'scaleFactor': 2,
                        'relativeSpeed': 800, # optional
                        'gestureSourceType': 'default' # optional
                    })

3. Walla! Chrome's zoom is invoked:

As a side note, there are tons of other commands you could use with send_cmd. Find them here: https://chromedevtools.github.io/devtools-protocol/

Based off this answer: Take full page screen shot in Chrome with Selenium