How to use CoverageResponseRange class of PuppeteerSharp.Messaging package

Add WaitForNavigationAsync() after your SetContentAsync() call to wait for the page content to load. By default it waits for the onLoad event, but you can use parameters to change it to wait for a different event.

await page.WaitForNavigationAsync();

You have to be careful with your domain property. If it's not valid, it will be ignored. For what I see there. You might be setting something like http://www.yourdomain.com, when yourdomain.com is expected.

I think EvaluateFunctionAsync is the most straight forward way to do this:

var type = await node.EvaluateFunctionAsync<string>("node => node.type");

The following code was working fine:

await page.WaitForSelectorAsync(".event"); // wait ajax completion
var divs = await page.QuerySelectorAllAsync(".event__header--no-my-games > .event__info");

foreach(var cd in divs)
{
   await cd.ClickAsync();
}

the problem was that the browser opened by Puppeteer had mobile dimension, in that case the selectors that I was looking for was differents.

I fixed that declaring a Viewport size in the following way:

Browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
      Headless = true,
      ExecutablePath = "your chrome path",
      DefaultViewport = new ViewPortOptions { Height = 1280, Width = 800}
});

this will open the site in desktop mode with correct selectors.

Hope this help someone.

You can use Page.WaitForFileChooserAsync to interact with the file chooser. The important thing to remember is you need to have the file chooser ready before you click the <input type="file">.

For example:

var fileChooserDialogTask = page.WaitForFileChooserAsync(); // Do not await here

await Task.WhenAll(fileChooserDialogTask, page.ClickAsync("input[type='file']"));

var fileChooser = await fileChooserDialogTask;
await fileChooser.AcceptAsync(pathToFile);

If you try to click the <input type="file"> before you've called WaitForFileChooserAsync, you'll be stuck with the modal file chooser dialog waiting for you to do something.

EvaluateExpressionAsync won't return DOM elements. You should build a serialized output. For instance, a string[] with the review text.

var reviews = "Array.from(document.querySelectorAll('.comments-content')).map(r => r.innerText);";
var reviews = await page.EvaluateExpressionAsync<string[]>(reviews);
Console.WriteLine(reviews);

This is how you can use System.Net.WebSockets.Managed on Puppeteer-Sharp

var browserOptions = new LaunchOptions
{
    Headless = true,
    WebSocketFactory = (uri, socketOptions, cancellationToken)
        => System.Net.WebSockets.SystemClientWebSocket.ConnectAsync(uri, cancellationToken)
};
using (var browser = await Puppeteer.LaunchAsync(browserOptions))
using (var page = await browser.NewPageAsync())
{

}

You might not be able to access to https://storage.googleapis.com/chromium-browser-snapshots/Win_x64/674921/chrome-win.zip.
If you can't access to that URL, you can try to download a Chromium 77 (or greater) manually, and use the ExecutablePath property to set the Chromium app location.

If you want to get an element from the browser you should get an ElementHandle, which is a pointer to an element in the browser, using EvaluateExpressionHandleAsync:

var element = await page.EvaluateExpressionHandleAsync($"document.querySelectorAll('[{attributeName}=\"{attributeValue}\"]')[0];");