How do I modify the user agent in Playwright's AndroidDevice class?


Modifying User Agent in Playwright's AndroidDevice Class

First, let's import the necessary modules and initialize a new instance of the AndroidDevice class. We'll use the 'Galaxy S9' as an example.

import { android } from '@playwright/test';

const device = await android.devices['Galaxy S9'];

Next, let's get the current user agent. The userAgent property returns a promise that resolves to a string representing the current user agent of the emulated device.

const userAgent = await device.userAgent();

Now, let's append a string to the user agent. You can do this by concatenating your desired string to the user agent.

const modifiedUserAgent = `${userAgent} MyCustomString`;

That's it! You've successfully modified the user agent. You can now use this modified user agent in your mobile project configuration as needed.

Remember, this guide is based on the AndroidDevice class in Playwright. If your mobile project or framework has additional requirements or constraints, you might need to adjust this process accordingly.

For more insights on Playwright, check out our blog post on Playwright Mobile App Testing for Android: A Comprehensive Guide.


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Rayrun is a community for QA engineers. I am constantly looking for new ways to add value to people learning Playwright and other browser automation frameworks. If you have feedback, email luc@ray.run.