How to use Device class of PuppeteerSharp.DevicesFetcher package

using below,

using var page = browser.NewPageAsync().Result;

page.TypeAsync("input[name='elementname']", valuetobeset).Wait();

Try upgrading PuppeteerSharp. Upgrading from 1.2 to 2.x fixed this for me.

You can use different browser instances for each logical instances. I mean instead of trying to set different proxy for each page/tab with different proxy just create new browser instance and set proxy via launch args.

If this solution doesn't fit your needs, check this question. There is library for NodeJS which give ability to use different proxy per each page/tab. You can check that library source code and implement same things inside your C# application.

That library is using very simple method. Instead of sending requests via puppeter's browser/page library send request via nodejs http tools. It can be done by using method page.setRequestInterception. So library intercept each request from page, after that gather data and send request via http tools. I used C# a long time ago. So maybe I am wrong, but you can try to use HttpWebRequest or something similar. After you get result you should use method request.respond and pass response results there. In this way you can put any kind of proxy inside your application. Check here code of library.

You don't need to call Dispose if you call CloseAsync. Dispose is just a fire and forget call to CloseAsync. See.

I think you should not do a .ConfigureAwait on the controller level, look at this article for more information: https://blog.stephencleary.com/2017/03/aspnetcore-synchronization-context.html.

ASP.NET team dropped the use of SynchronizationContext, so using it in your controller is pointless.

As the article states, you should still use it on your service level, as you don't know whether or not a UI could plug itself to the service and use it, but on your WEB API, you can drop it.

Should be due to PuppeteerSharp requires to run on Linux system in Azure (which can download and install Chromium by coding). If want to test on Windows, need to pre-install Chrome/Chromium and add ExecutablePath in LaunchOptions

// DEBUG: for running on local
ExecutablePath = "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe"

Please share if you have other solutions.

I would use WaitForSelectorAsync instead:

var frameElement = await page.WaitForSelectorAsync("#google_ads_frame5");
var frame = await frameElement.ContentFrameAsync();
var frameContent = await frame.GetContentAsync();

You should an object in your map

Array.from(document.querySelectorAll('{allResultsSelector}'))
   .map(f =>{ return { patientName: f.innerText} });

I have found the solution, here it is for those who may be interested:

First, we should create a CDPSession like this:

var client = await page.Target.CreateCDPSessionAsync();

then we should Evaluate our script to get an element:

var body = await client.SendAsync("Runtime.evaluate", new { expression = "document.getElementsByTagName('input')[0]" });

and at last, we should use DOMDebugger with the element's objectId to get its event listeners:

var result = await client.SendAsync("DOMDebugger.getEventListeners", new { objectId = body["result"]["objectId"] });