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Showing content from https://playwright.dev/python/docs/emulation below:

Emulation | Playwright Python

With Playwright you can test your app on any browser as well as emulate a real device such as a mobile phone or tablet. Simply configure the devices you would like to emulate and Playwright will simulate the browser behavior such as "userAgent", "screenSize", "viewport" and if it "hasTouch" enabled. You can also emulate the "geolocation", "locale" and "timezone" for all tests or for a specific test as well as set the "permissions" to show notifications or change the "colorScheme".

Playwright comes with a registry of device parameters using playwright.devices for selected desktop, tablet and mobile devices. It can be used to simulate browser behavior for a specific device such as user agent, screen size, viewport and if it has touch enabled. All tests will run with the specified device parameters.

• Sync
• Async

from playwright.sync_api import sync_playwright, Playwright

def run(playwright: Playwright):
    iphone_13 = playwright.devices['iPhone 13']
    browser = playwright.webkit.launch(headless=False)
    context = browser.new_context(
        **iphone_13,
    )

with sync_playwright() as playwright:
    run(playwright)

import asyncio
from playwright.async_api import async_playwright, Playwright

async def run(playwright: Playwright):
    iphone_13 = playwright.devices['iPhone 13']
    browser = await playwright.webkit.launch(headless=False)
    context = await browser.new_context(
        **iphone_13,
    )

async def main():
    async with async_playwright() as playwright:
        await run(playwright)
asyncio.run(main())

The viewport is included in the device but you can override it for some tests with page.set_viewport_size().

Test file:

The same works inside a test file.

• Sync
• Async

context = browser.new_context(
  viewport={ 'width': 1280, 'height': 1024 }
)


page.set_viewport_size({"width": 1600, "height": 1200})


context = browser.new_context(
  viewport={ 'width': 2560, 'height': 1440 },
  device_scale_factor=2,
)

context = await browser.new_context(
  viewport={ 'width': 1280, 'height': 1024 }
)


await page.set_viewport_size({"width": 1600, "height": 1200})


context = await browser.new_context(
  viewport={ 'width': 2560, 'height': 1440 },
  device_scale_factor=2,
)

Whether the meta viewport tag is taken into account and touch events are enabled.

• Sync
• Async

context = browser.new_context(
  isMobile=false
)

context = await browser.new_context(
  isMobile=false
)

Emulate the browser Locale and Timezone which can be set globally for all tests in the config and then overridden for particular tests.

• Sync
• Async

context = browser.new_context(
  locale='de-DE',
  timezone_id='Europe/Berlin',
)

context = await browser.new_context(
  locale='de-DE',
  timezone_id='Europe/Berlin',
)

Allow app to show system notifications.

• Sync
• Async

context = browser.new_context(
  permissions=['notifications'],
)

context = await browser.new_context(
  permissions=['notifications'],
)

Allow notifications for a specific domain.

• Sync
• Async

context.grant_permissions(['notifications'], origin='https://skype.com')

await context.grant_permissions(['notifications'], origin='https://skype.com')

Revoke all permissions with browser_context.clear_permissions().

• Sync
• Async

context.clear_permissions()

await context.clear_permissions()

Grant "geolocation" permissions and set geolocation to a specific area.

• Sync
• Async

context = browser.new_context(
  geolocation={"longitude": 41.890221, "latitude": 12.492348},
  permissions=["geolocation"]
)

context = await browser.new_context(
  geolocation={"longitude": 41.890221, "latitude": 12.492348},
  permissions=["geolocation"]
)

Change the location later:

• Sync
• Async

context.set_geolocation({"longitude": 48.858455, "latitude": 2.294474})

await context.set_geolocation({"longitude": 48.858455, "latitude": 2.294474})

Note you can only change geolocation for all pages in the context.

Emulate the users "colorScheme". Supported values are 'light' and 'dark'. You can also emulate the media type with page.emulate_media().

• Sync
• Async

context = browser.new_context(
  color_scheme='dark' 
)


page = browser.new_page(
  color_scheme='dark' 
)


page.emulate_media(color_scheme='dark')


page.emulate_media(media='print')

context = await browser.new_context(
  color_scheme='dark' 
)


page = await browser.new_page(
  color_scheme='dark' 
)


await page.emulate_media(color_scheme='dark')


await page.emulate_media(media='print')

The User Agent is included in the device and therefore you will rarely need to change it however if you do need to test a different user agent you can override it with the userAgent property.

• Sync
• Async

context = browser.new_context(
  user_agent='My user agent'
)

context = await browser.new_context(
  user_agent='My user agent'
)

Emulate the network being offline.

• Sync
• Async

context = browser.new_context(
  offline=True
)

context = await browser.new_context(
  offline=True
)

Emulate a user scenario where JavaScript is disabled.

• Sync
• Async

context = browser.new_context(
  java_script_enabled=False
)

context = await browser.new_context(
  java_script_enabled=False
)

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