How to use EvalOnSelectorAsync method of Microsoft.Playwright.Core.Frame class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Core.Frame.EvalOnSelectorAsync

Page.cs

Source:Page.cs

...361                // Swallow exception362            }363        }364        public Task<T> EvaluateAsync<T>(string expression, object arg) => MainFrame.EvaluateAsync<T>(expression, arg);365        public Task<JsonElement?> EvalOnSelectorAsync(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAsync(selector, expression, arg);366        public Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg = null, PageEvalOnSelectorOptions options = null)367            => MainFrame.EvalOnSelectorAsync<T>(selector, expression, arg, new() { Strict = options?.Strict });368        public ILocator Locator(string selector, PageLocatorOptions options = default)369            => MainFrame.Locator(selector, new() { HasTextString = options?.HasTextString, HasTextRegex = options?.HasTextRegex, Has = options?.Has });370        public Task<IElementHandle> QuerySelectorAsync(string selector, PageQuerySelectorOptions options = null)371            => MainFrame.QuerySelectorAsync(selector, new() { Strict = options?.Strict });372        public Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAsync<T>(selector, expression, arg);373        public Task<JsonElement?> EvalOnSelectorAllAsync(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAllAsync(selector, expression, arg);374        public Task<T> EvalOnSelectorAllAsync<T>(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAllAsync<T>(selector, expression, arg);375        public Task FillAsync(string selector, string value, PageFillOptions options = default)376            => MainFrame.FillAsync(selector, value, new() { NoWaitAfter = options?.NoWaitAfter, Timeout = options?.Timeout, Force = options?.Force, Strict = options?.Strict });377        public Task SetInputFilesAsync(string selector, string files, PageSetInputFilesOptions options = default)378            => MainFrame.SetInputFilesAsync(selector, files, Map(options));379        public Task SetInputFilesAsync(string selector, IEnumerable<string> files, PageSetInputFilesOptions options = default)380            => MainFrame.SetInputFilesAsync(selector, files, Map(options));381        public Task SetInputFilesAsync(string selector, FilePayload files, PageSetInputFilesOptions options = default)382            => MainFrame.SetInputFilesAsync(selector, files, Map(options));383        public Task SetInputFilesAsync(string selector, IEnumerable<FilePayload> files, PageSetInputFilesOptions options = default)384            => MainFrame.SetInputFilesAsync(selector, files, Map(options));385        public Task TypeAsync(string selector, string text, PageTypeOptions options = default)386            => MainFrame.TypeAsync(selector, text, new()...

PageRouteTests.cs

Source:PageRouteTests.cs

...105                <form action='/rredirect' method='post'>106                    <input type=""hidden"" id=""foo"" name=""foo"" value=""FOOBAR"">107                </form>");108            await TaskUtils.WhenAll(109                Page.EvalOnSelectorAsync("form", "form => form.submit()"),110                Page.WaitForNavigationAsync()111            );112        }113        [PlaywrightTest("page-route.spec.ts", "should work when header manipulation headers with redirect")]114        public async Task ShouldWorkWhenHeaderManipulationHeadersWithRedirect()115        {116            Server.SetRedirect("/rrredirect", "/empty.html");117            await Page.RouteAsync("**/*", (route) =>118            {119#pragma warning disable 0612120                var headers = new Dictionary<string, string>(route.Request.Headers.ToDictionary(x => x.Key, x => x.Value)) { ["foo"] = "bar" };121#pragma warning restore 0612122                route.ContinueAsync(new() { Headers = headers });123            });124            await Page.GotoAsync(Server.Prefix + "/rrredirect");125        }126        [PlaywrightTest("page-route.spec.ts", "should be able to remove headers")]127        public async Task ShouldBeAbleToRemoveHeaders()128        {129            await Page.RouteAsync("**/*", (route) =>130            {131#pragma warning disable 0612132                var headers = new Dictionary<string, string>(route.Request.Headers.ToDictionary(x => x.Key, x => x.Value)) { ["foo"] = "bar" };133#pragma warning restore 0612134                headers.Remove("origin");135                route.ContinueAsync(new() { Headers = headers });136            });137            var originRequestHeader = Server.WaitForRequest("/empty.html", request => request.Headers["origin"]);138            await TaskUtils.WhenAll(139                originRequestHeader,140                Page.GotoAsync(Server.EmptyPage)141            );142            Assert.AreEqual(StringValues.Empty, originRequestHeader.Result);143        }144        [PlaywrightTest("page-route.spec.ts", "should contain referer header")]145        public async Task ShouldContainRefererHeader()146        {147            var requests = new List<IRequest>();148            await Page.RouteAsync("**/*", (route) =>149            {150                requests.Add(route.Request);151                route.ContinueAsync();152            });153            await Page.GotoAsync(Server.Prefix + "/one-style.html");154            StringAssert.Contains("/one-style.css", requests[1].Url);155#pragma warning disable 0612156            StringAssert.Contains("/one-style.html", requests[1].Headers["referer"]);157#pragma warning restore 0612158        }159        [PlaywrightTest("page-route.spec.ts", "should properly return navigation response when URL has cookies")]160        public async Task ShouldProperlyReturnNavigationResponseWhenURLHasCookies()161        {162            // Setup cookie.163            await Page.GotoAsync(Server.EmptyPage);164            await Context.AddCookiesAsync(new[]165            {166                new Cookie167                {168                    Url = Server.EmptyPage,169                    Name = "foo",170                    Value = "bar"171                }172            });173            // Setup request interception.174            await Page.RouteAsync("**/*", (route) => route.ContinueAsync());175            var response = await Page.ReloadAsync();176            Assert.AreEqual((int)HttpStatusCode.OK, response.Status);177        }178        [PlaywrightTest("page-route.spec.ts", "should show custom HTTP headers")]179        public async Task ShouldShowCustomHTTPHeaders()180        {181            await Page.SetExtraHTTPHeadersAsync(new Dictionary<string, string>182            {183                ["foo"] = "bar"184            });185            await Page.RouteAsync("**/*", (route) =>186            {187#pragma warning disable 0612188                Assert.AreEqual("bar", route.Request.Headers["foo"]);189#pragma warning restore 0612190                route.ContinueAsync();191            });192            var response = await Page.GotoAsync(Server.EmptyPage);193            Assert.True(response.Ok);194        }195        [PlaywrightTest("page-route.spec.ts", "should work with redirect inside sync XHR")]196        public async Task ShouldWorkWithRedirectInsideSyncXHR()197        {198            await Page.GotoAsync(Server.EmptyPage);199            Server.SetRedirect("/logo.png", "/pptr.png");200            await Page.RouteAsync("**/*", (route) => route.ContinueAsync());201            int status = await Page.EvaluateAsync<int>(@"async () => {202                var request = new XMLHttpRequest();203                request.open('GET', '/logo.png', false);  // `false` makes the request synchronous204                request.send(null);205                return request.status;206            }");207            Assert.AreEqual(200, status);208        }209        [PlaywrightTest("page-route.spec.ts", "should work with custom referer headers")]210        public async Task ShouldWorkWithCustomRefererHeaders()211        {212            await Page.SetExtraHTTPHeadersAsync(new Dictionary<string, string> { ["referer"] = Server.EmptyPage });213            await Page.RouteAsync("**/*", (route) =>214            {215                if (TestConstants.IsChromium)216                {217#pragma warning disable 0612218                    Assert.AreEqual(Server.EmptyPage + ", " + Server.EmptyPage, route.Request.Headers["referer"]);219#pragma warning restore 0612220                }221                else222                {223#pragma warning disable 0612224                    Assert.AreEqual(Server.EmptyPage, route.Request.Headers["referer"]);225#pragma warning restore 0612226                }227                route.ContinueAsync();228            });229            var response = await Page.GotoAsync(Server.EmptyPage);230            Assert.True(response.Ok);231        }232        [PlaywrightTest("page-route.spec.ts", "should be abortable")]233        public async Task ShouldBeAbortable()234        {235            await Page.RouteAsync(new Regex("\\.css"), (route) => route.AbortAsync());236            int failedRequests = 0;237            Page.RequestFailed += (_, _) => ++failedRequests;238            var response = await Page.GotoAsync(Server.Prefix + "/one-style.html");239            Assert.True(response.Ok);240            Assert.Null(response.Request.Failure);241            Assert.AreEqual(1, failedRequests);242        }243        [PlaywrightTest("page-route.spec.ts", "should be abortable with custom error codes")]244        public async Task ShouldBeAbortableWithCustomErrorCodes()245        {246            await Page.RouteAsync("**/*", (route) =>247            {248                route.AbortAsync(RequestAbortErrorCode.InternetDisconnected);249            });250            IRequest failedRequest = null;251            Page.RequestFailed += (_, e) => failedRequest = e;252            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => Page.GotoAsync(Server.EmptyPage));253            Assert.NotNull(failedRequest);254            StringAssert.StartsWith(failedRequest.Failure, exception.Message);255            if (TestConstants.IsWebKit)256            {257                Assert.AreEqual("Request intercepted", failedRequest.Failure);258            }259            else if (TestConstants.IsFirefox)260            {261                Assert.AreEqual("NS_ERROR_OFFLINE", failedRequest.Failure);262            }263            else264            {265                Assert.AreEqual("net::ERR_INTERNET_DISCONNECTED", failedRequest.Failure);266            }267        }268        [PlaywrightTest("page-route.spec.ts", "should send referer")]269        public async Task ShouldSendReferer()270        {271            await Page.SetExtraHTTPHeadersAsync(new Dictionary<string, string> { ["referer"] = "http://google.com/" });272            await Page.RouteAsync("**/*", (route) => route.ContinueAsync());273#pragma warning disable 0612274            var requestTask = Server.WaitForRequest("/grid.html", request => request.Headers["referer"]);275#pragma warning restore 0612276            await TaskUtils.WhenAll(277                requestTask,278                Page.GotoAsync(Server.Prefix + "/grid.html")279            );280            Assert.AreEqual("http://google.com/", requestTask.Result);281        }282        [PlaywrightTest("page-route.spec.ts", "should fail navigation when aborting main resource")]283        public async Task ShouldFailNavigationWhenAbortingMainResource()284        {285            await Page.RouteAsync("**/*", (route) => route.AbortAsync());286            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => Page.GotoAsync(Server.EmptyPage));287            Assert.NotNull(exception);288            if (TestConstants.IsWebKit)289            {290                StringAssert.Contains("Request intercepted", exception.Message);291            }292            else if (TestConstants.IsFirefox)293            {294                StringAssert.Contains("NS_ERROR_FAILURE", exception.Message);295            }296            else297            {298                StringAssert.Contains("net::ERR_FAILED", exception.Message);299            }300        }301        [PlaywrightTest("page-route.spec.ts", "should not work with redirects")]302        public async Task ShouldNotWorkWithRedirects()303        {304            var requests = new List<IRequest>();305            await Page.RouteAsync("**/*", (route) =>306            {307                route.ContinueAsync();308                requests.Add(route.Request);309            });310            Server.SetRedirect("/non-existing-page.html", "/non-existing-page-2.html");311            Server.SetRedirect("/non-existing-page-2.html", "/non-existing-page-3.html");312            Server.SetRedirect("/non-existing-page-3.html", "/non-existing-page-4.html");313            Server.SetRedirect("/non-existing-page-4.html", "/empty.html");314            var response = await Page.GotoAsync(Server.Prefix + "/non-existing-page.html");315            StringAssert.Contains("non-existing-page.html", requests[0].Url);316            Assert.That(requests, Has.Count.EqualTo(1));317            Assert.AreEqual("document", requests[0].ResourceType);318            Assert.True(requests[0].IsNavigationRequest);319            var chain = new List<IRequest>();320            for (var request = response.Request; request != null; request = request.RedirectedFrom)321            {322                chain.Add(request);323                Assert.True(request.IsNavigationRequest);324            }325            Assert.AreEqual(5, chain.Count);326            StringAssert.Contains("/empty.html", chain[0].Url);327            StringAssert.Contains("/non-existing-page-4.html", chain[1].Url);328            StringAssert.Contains("/non-existing-page-3.html", chain[2].Url);329            StringAssert.Contains("/non-existing-page-2.html", chain[3].Url);330            StringAssert.Contains("/non-existing-page.html", chain[4].Url);331            for (int i = 0; i < chain.Count; ++i)332            {333                var request = chain[i];334                Assert.True(request.IsNavigationRequest);335                Assert.AreEqual(i > 0 ? chain[i - 1] : null, chain[i].RedirectedTo);336            }337        }338        [PlaywrightTest("page-route.spec.ts", "should work with redirects for subresources")]339        public async Task ShouldWorkWithRedirectsForSubresources()340        {341            var requests = new List<IRequest>();342            await Page.RouteAsync("**/*", (route) =>343            {344                route.ContinueAsync();345                requests.Add(route.Request);346            });347            Server.SetRedirect("/one-style.css", "/two-style.css");348            Server.SetRedirect("/two-style.css", "/three-style.css");349            Server.SetRedirect("/three-style.css", "/four-style.css");350            Server.SetRoute("/four-style.css", context => context.Response.WriteAsync("body {box-sizing: border-box; }"));351            var response = await Page.GotoAsync(Server.Prefix + "/one-style.html");352            Assert.AreEqual((int)HttpStatusCode.OK, response.Status);353            StringAssert.Contains("one-style.html", response.Url);354            Assert.AreEqual(2, requests.Count);355            Assert.AreEqual("document", requests[0].ResourceType);356            StringAssert.Contains("one-style.html", requests[0].Url);357            var request = requests[1];358            foreach (string url in new[] { "/one-style.css", "/two-style.css", "/three-style.css", "/four-style.css" })359            {360                Assert.AreEqual("stylesheet", request.ResourceType);361                StringAssert.Contains(url, request.Url);362                request = request.RedirectedTo;363            }364            Assert.Null(request);365        }366        [PlaywrightTest("page-route.spec.ts", "should work with equal requests")]367        public async Task ShouldWorkWithEqualRequests()368        {369            await Page.GotoAsync(Server.EmptyPage);370            int responseCount = 1;371            Server.SetRoute("/zzz", context => context.Response.WriteAsync((responseCount++ * 11).ToString()));372            bool spinner = false;373            // Cancel 2nd request.374            await Page.RouteAsync("**/*", (route) =>375            {376                if (spinner)377                {378                    _ = route.AbortAsync();379                }380                else381                {382                    _ = route.ContinueAsync();383                }384                spinner = !spinner;385            });386            var results = new List<string>();387            for (int i = 0; i < 3; ++i)388            {389                results.Add(await Page.EvaluateAsync<string>("fetch('/zzz').then(response => response.text()).catch (e => 'FAILED')"));390            }391            Assert.AreEqual(new[] { "11", "FAILED", "22" }, results);392        }393        [PlaywrightTest("page-route.spec.ts", "should navigate to dataURL and not fire dataURL requests")]394        public async Task ShouldNavigateToDataURLAndNotFireDataURLRequests()395        {396            var requests = new List<IRequest>();397            await Page.RouteAsync("**/*", (route) =>398            {399                requests.Add(route.Request);400                route.ContinueAsync();401            });402            string dataURL = "data:text/html,<div>yo</div>";403            var response = await Page.GotoAsync(dataURL);404            Assert.Null(response);405            Assert.IsEmpty(requests);406        }407        [PlaywrightTest("page-route.spec.ts", "should be able to fetch dataURL and not fire dataURL requests")]408        public async Task ShouldBeAbleToFetchDataURLAndNotFireDataURLRequests()409        {410            await Page.GotoAsync(Server.EmptyPage);411            var requests = new List<IRequest>();412            await Page.RouteAsync("**/*", (route) =>413            {414                requests.Add(route.Request);415                route.ContinueAsync();416            });417            string dataURL = "data:text/html,<div>yo</div>";418            string text = await Page.EvaluateAsync<string>("url => fetch(url).then(r => r.text())", dataURL);419            Assert.AreEqual("<div>yo</div>", text);420            Assert.IsEmpty(requests);421        }422        [PlaywrightTest("page-route.spec.ts", "should navigate to URL with hash and and fire requests without hash")]423        public async Task ShouldNavigateToURLWithHashAndAndFireRequestsWithoutHash()424        {425            var requests = new List<IRequest>();426            await Page.RouteAsync("**/*", (route) =>427            {428                requests.Add(route.Request);429                route.ContinueAsync();430            });431            var response = await Page.GotoAsync(Server.EmptyPage + "#hash");432            Assert.AreEqual((int)HttpStatusCode.OK, response.Status);433            Assert.AreEqual(Server.EmptyPage, response.Url);434            Assert.That(requests, Has.Count.EqualTo(1));435            Assert.AreEqual(Server.EmptyPage, requests[0].Url);436        }437        [PlaywrightTest("page-route.spec.ts", "should work with encoded server")]438        public async Task ShouldWorkWithEncodedServer()439        {440            // The requestWillBeSent will report encoded URL, whereas interception will441            // report URL as-is. @see crbug.com/759388442            await Page.RouteAsync("**/*", (route) => route.ContinueAsync());443            var response = await Page.GotoAsync(Server.Prefix + "/some nonexisting page");444            Assert.AreEqual((int)HttpStatusCode.NotFound, response.Status);445        }446        [PlaywrightTest("page-route.spec.ts", "should work with badly encoded server")]447        public async Task ShouldWorkWithBadlyEncodedServer()448        {449            Server.SetRoute("/malformed?rnd=%911", _ => Task.CompletedTask);450            await Page.RouteAsync("**/*", (route) => route.ContinueAsync());451            var response = await Page.GotoAsync(Server.Prefix + "/malformed?rnd=%911");452            Assert.AreEqual((int)HttpStatusCode.OK, response.Status);453        }454        [PlaywrightTest("page-route.spec.ts", "should work with encoded server - 2")]455        public async Task ShouldWorkWithEncodedServer2()456        {457            // The requestWillBeSent will report URL as-is, whereas interception will458            // report encoded URL for stylesheet. @see crbug.com/759388459            var requests = new List<IRequest>();460            await Page.RouteAsync("**/*", (route) =>461            {462                route.ContinueAsync();463                requests.Add(route.Request);464            });465            var response = await Page.GotoAsync($"data:text/html,<link rel=\"stylesheet\" href=\"{Server.EmptyPage}/fonts?helvetica|arial\"/>");466            Assert.Null(response);467            // TODO: https://github.com/microsoft/playwright/issues/12789468            if (TestConstants.IsFirefox)469                Assert.That(requests, Has.Count.EqualTo(2));470            else471                Assert.That(requests, Has.Count.EqualTo(1));472            Assert.AreEqual((int)HttpStatusCode.NotFound, (await requests[0].ResponseAsync()).Status);473        }474        [PlaywrightTest("page-route.spec.ts", @"should not throw ""Invalid Interception Id"" if the request was cancelled")]475        public async Task ShouldNotThrowInvalidInterceptionIdIfTheRequestWasCancelled()476        {477            await Page.SetContentAsync("<iframe></iframe>");478            IRoute route = null;479            await Page.RouteAsync("**/*", (r) => route = r);480            _ = Page.EvalOnSelectorAsync("iframe", "(frame, url) => frame.src = url", Server.EmptyPage);481            // Wait for request interception.482            await Page.WaitForRequestAsync("**/*");483            // Delete frame to cause request to be canceled.484            await Page.EvalOnSelectorAsync("iframe", "frame => frame.remove()");485            await route.ContinueAsync();486        }487        [PlaywrightTest("page-route.spec.ts", "should intercept main resource during cross-process navigation")]488        public async Task ShouldInterceptMainResourceDuringCrossProcessNavigation()489        {490            await Page.GotoAsync(Server.EmptyPage);491            bool intercepted = false;492            await Page.RouteAsync(Server.CrossProcessPrefix + "/empty.html", (route) =>493            {494                if (route.Request.Url.Contains(Server.CrossProcessPrefix + "/empty.html"))495                {496                    intercepted = true;497                }498                route.ContinueAsync();...

Frame.cs

Source:Frame.cs

...417        public async Task<T> EvaluateAsync<T>(string script, object arg = null)418            => ScriptsHelper.ParseEvaluateResult<T>(await _channel.EvaluateExpressionAsync(419                script,420                arg: ScriptsHelper.SerializedArgument(arg)).ConfigureAwait(false));421        public async Task<JsonElement?> EvalOnSelectorAsync(string selector, string script, object arg = null)422            => ScriptsHelper.ParseEvaluateResult<JsonElement?>(await _channel.EvalOnSelectorAsync(423                selector: selector,424                script,425                arg: ScriptsHelper.SerializedArgument(arg),426                strict: null).ConfigureAwait(false));427        public async Task<T> EvalOnSelectorAsync<T>(string selector, string script, object arg = null)428            => ScriptsHelper.ParseEvaluateResult<T>(await _channel.EvalOnSelectorAsync(429                selector: selector,430                script,431                arg: ScriptsHelper.SerializedArgument(arg),432                strict: null).ConfigureAwait(false));433        public async Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg = null, FrameEvalOnSelectorOptions options = null)434            => ScriptsHelper.ParseEvaluateResult<T>(await _channel.EvalOnSelectorAsync(435                selector: selector,436                expression,437                arg: ScriptsHelper.SerializedArgument(arg),438                strict: options?.Strict).ConfigureAwait(false));439        public async Task<JsonElement?> EvalOnSelectorAllAsync(string selector, string script, object arg = null)440            => ScriptsHelper.ParseEvaluateResult<JsonElement?>(await _channel.EvalOnSelectorAllAsync(441                selector: selector,442                script,443                arg: ScriptsHelper.SerializedArgument(arg)).ConfigureAwait(false));444        public async Task<T> EvalOnSelectorAllAsync<T>(string selector, string script, object arg = null)445            => ScriptsHelper.ParseEvaluateResult<T>(await _channel.EvalOnSelectorAllAsync(446                selector: selector,447                script,448                arg: ScriptsHelper.SerializedArgument(arg)).ConfigureAwait(false));...

FrameChannel.cs

Source:FrameChannel.cs

...121                    ["expression"] = script,122                    ["arg"] = arg,123                });124        }125        internal Task<JsonElement?> EvalOnSelectorAsync(string selector, string script, object arg, bool? strict)126            => Connection.SendMessageToServerAsync<JsonElement?>(127                Guid,128                "evalOnSelector",129                new Dictionary<string, object>130                {131                    ["selector"] = selector,132                    ["expression"] = script,133                    ["arg"] = arg,134                    ["strict"] = strict,135                });136        internal Task<JsonElement?> EvalOnSelectorAllAsync(string selector, string script, object arg)137            => Connection.SendMessageToServerAsync<JsonElement?>(138                Guid,139                "evalOnSelectorAll",...

ElementHandleChannel.cs

Source:ElementHandleChannel.cs

...110                }).ToArray();111            }112            return (await Connection.SendMessageToServerAsync(Guid, "screenshot", args).ConfigureAwait(false))?.GetProperty("binary").GetBytesFromBase64();113        }114        internal Task<JsonElement?> EvalOnSelectorAsync(string selector, string script, object arg)115            => Connection.SendMessageToServerAsync<JsonElement?>(116                Guid,117                "evalOnSelector",118                new Dictionary<string, object>119                {120                    ["selector"] = selector,121                    ["expression"] = script,122                    ["arg"] = arg,123                });124        internal Task<JsonElement?> EvalOnSelectorAllAsync(string selector, string script, object arg)125            => Connection.SendMessageToServerAsync<JsonElement?>(126                Guid,127                "evalOnSelectorAll",128                new Dictionary<string, object>...

Locator.cs

Source:Locator.cs

...114            => _frame.EvalOnSelectorAllAsync<T>(_selector, expression, arg);115        public Task<JsonElement?> EvaluateAsync(string expression, object arg = null, LocatorEvaluateOptions options = null)116            => EvaluateAsync<JsonElement?>(expression, arg, options);117        public Task<T> EvaluateAsync<T>(string expression, object arg = null, LocatorEvaluateOptions options = null)118            => _frame.EvalOnSelectorAsync<T>(_selector, expression, arg, ConvertOptions<FrameEvalOnSelectorOptions>(options));119        public async Task<IJSHandle> EvaluateHandleAsync(string expression, object arg = null, LocatorEvaluateHandleOptions options = null)120            => await WithElementAsync(async (e, _) => await e.EvaluateHandleAsync(expression, arg).ConfigureAwait(false), options).ConfigureAwait(false);121        public async Task FillAsync(string value, LocatorFillOptions options = null)122            => await _frame.FillAsync(_selector, value, ConvertOptions<FrameFillOptions>(options)).ConfigureAwait(false);123        public Task FocusAsync(LocatorFocusOptions options = null)124            => _frame.FocusAsync(_selector, ConvertOptions<FrameFocusOptions>(options));125        IFrameLocator ILocator.FrameLocator(string selector) =>126            new FrameLocator(_frame, $"{_selector} >> {selector}");127        public Task<string> GetAttributeAsync(string name, LocatorGetAttributeOptions options = null)128            => _frame.GetAttributeAsync(_selector, name, ConvertOptions<FrameGetAttributeOptions>(options));129        public Task HoverAsync(LocatorHoverOptions options = null)130            => _frame.HoverAsync(_selector, ConvertOptions<FrameHoverOptions>(options));131        public Task<string> InnerHTMLAsync(LocatorInnerHTMLOptions options = null)132            => _frame.InnerHTMLAsync(_selector, ConvertOptions<FrameInnerHTMLOptions>(options));...

ElementHandle.cs

Source:ElementHandle.cs

...152        public async Task<IElementHandle> QuerySelectorAsync(string selector)153            => (await _channel.QuerySelectorAsync(selector).ConfigureAwait(false))?.Object;154        public async Task<IReadOnlyList<IElementHandle>> QuerySelectorAllAsync(string selector)155            => (await _channel.QuerySelectorAllAsync(selector).ConfigureAwait(false)).Select(e => ((ElementHandleChannel)e).Object).ToList().AsReadOnly();156        public async Task<JsonElement?> EvalOnSelectorAsync(string selector, string expression, object arg = null)157            => ScriptsHelper.ParseEvaluateResult<JsonElement?>(await _channel.EvalOnSelectorAsync(158                selector: selector,159                script: expression,160                arg: ScriptsHelper.SerializedArgument(arg)).ConfigureAwait(false));161        public async Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg = null)162            => ScriptsHelper.ParseEvaluateResult<T>(await _channel.EvalOnSelectorAsync(163                selector: selector,164                script: expression,165                arg: ScriptsHelper.SerializedArgument(arg)).ConfigureAwait(false));166        public async Task<T> EvalOnSelectorAllAsync<T>(string selector, string expression, object arg = null)167            => ScriptsHelper.ParseEvaluateResult<T>(await _channel.EvalOnSelectorAllAsync(168                selector: selector,169                script: expression,170                arg: ScriptsHelper.SerializedArgument(arg)).ConfigureAwait(false));171        public Task FocusAsync() => _channel.FocusAsync();172        public Task DispatchEventAsync(string type, object eventInit = null)173            => _channel.DispatchEventAsync(174                type,175                eventInit = ScriptsHelper.SerializedArgument(eventInit));176        public Task<string> GetAttributeAsync(string name) => _channel.GetAttributeAsync(name);...

FrameGoToTests.cs

Source:FrameGoToTests.cs

...51            Server.SetRoute("/empty.html", _ => Task.Delay(10000));52            var waitForRequestTask = Server.WaitForRequest("/empty.html");53            var navigationTask = Page.FirstChildFrame().GotoAsync(Server.EmptyPage);54            await waitForRequestTask;55            await Page.EvalOnSelectorAsync("iframe", "frame => frame.remove()");56            var exception = await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => navigationTask);57            StringAssert.Contains("frame was detached", exception.Message);58        }59        [PlaywrightTest("frame-goto.spec.ts", "should continue after client redirect")]60        public async Task ShouldContinueAfterClientRedirect()61        {62            Server.SetRoute("/frames/script.js", _ => Task.Delay(10000));63            string url = Server.Prefix + "/frames/child-redirect.html";64            var exception = await PlaywrightAssert.ThrowsAsync<TimeoutException>(() => Page.GotoAsync(url, new() { WaitUntil = WaitUntilState.NetworkIdle, Timeout = 5000 }));65            StringAssert.Contains("Timeout 5000ms", exception.Message);66            StringAssert.Contains($"navigating to \"{url}\", waiting until \"networkidle\"", exception.Message);67        }68        [PlaywrightTest("frame-goto.spec.ts", "should return matching responses")]69        public async Task ShouldReturnMatchingResponses()...

EvalOnSelectorAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Webkit.LaunchAsync();10            var page = await browser.NewPageAsync();11            var result = await page.EvalOnSelectorAsync<int>("button", "e => e.value");12            Console.WriteLine(result);13        }14    }15}

EvalOnSelectorAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            await using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            var searchBox = await page.QuerySelectorAsync("input[name=q]");14            await searchBox.TypeAsync("Playwright");15            var searchButton = await page.QuerySelectorAsync("input[name=btnK]");16            await searchButton.ClickAsync();17            await page.WaitForSelectorAsync("text=Playwright: Node.js library to automate Chromium, Firefox and WebKit with a single API");18            await page.EvalOnSelectorAsync("text=Playwright: Node.js library to automate Chromium, Firefox and WebKit with a single API", @"(element) => {19                element.scrollIntoView();20                element.click();21                }");22        }23    }24}25using System;26using System.Threading.Tasks;27using Microsoft.Playwright;28{29    {30        static async Task Main(string[] args)31        {32            await using var playwright = await Playwright.CreateAsync();33            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions34            {35            });36            var page = await browser.NewPageAsync();37            var searchBox = await page.QuerySelectorAsync("input[name=q]");38            await searchBox.TypeAsync("Playwright");39            var searchButton = await page.QuerySelectorAsync("input[name=btnK]");40            await searchButton.ClickAsync();41            await page.WaitForSelectorAsync("text=Playwright: Node.js library to automate Chromium, Firefox and WebKit with a single API");42            var allElements = await page.EvalOnSelectorAllAsync("text=Playwright: Node.js library to automate Chromium, Firefox and WebKit with a single API", @"(element) => {43                element.scrollIntoView();44                element.click();

EvalOnSelectorAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new()10            {11            });12            var page = await browser.NewPageAsync();13            var frame = page.MainFrame.ChildFrames[0];14            var elementHandle = await frame.EvalOnSelectorAsync<ElementHandle>("selector", "code to evaluate");15        }16    }17}18using System;19using System.Threading.Tasks;20using Microsoft.Playwright;21{22    {23        static async Task Main(string[] args)24        {25            using var playwright = await Playwright.CreateAsync();26            await using var browser = await playwright.Chromium.LaunchAsync(new()27            {28            });29            var page = await browser.NewPageAsync();30            var frame = page.MainFrame.ChildFrames[0];31            var elementHandle = await frame.WaitForSelectorAsync("selector");32        }33    }34}35using System;36using System.Threading.Tasks;37using Microsoft.Playwright;38{39    {40        static async Task Main(string[] args)41        {42            using var playwright = await Playwright.CreateAsync();43            await using var browser = await playwright.Chromium.LaunchAsync(new()44            {45            });46            var page = await browser.NewPageAsync();47            var frame = page.MainFrame.ChildFrames[0];48            var elementHandle = await frame.WaitForSelectorAsync("selector", new()49            {50            });51        }52    }53}54using System;55using System.Threading.Tasks;

EvalOnSelectorAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            await using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            var result = await page.EvalOnSelectorAsync<string>("input[name='q']", "element => element.value");14        }15    }16}17using System;18using System.Threading.Tasks;19using Microsoft.Playwright;20{21    {22        static async Task Main(string[] args)23        {24            await using var playwright = await Playwright.CreateAsync();25            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions26            {27            });28            var page = await browser.NewPageAsync();29            var result = await page.EvalOnSelectorAllAsync<string>("input[name='q']", "element => element.value");30        }31    }32}33using System;34using System.Threading.Tasks;35using Microsoft.Playwright;36{37    {38        static async Task Main(string[] args)39        {40            await using var playwright = await Playwright.CreateAsync();41            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions42            {43            });44            var page = await browser.NewPageAsync();45            var result = await page.QuerySelectorAsync("input[name='q']");46            await result.FillAsync("test");47        }48    }49}

EvalOnSelectorAsync

Using AI Code Generation

1var playwright = await Microsoft.Playwright.Playwright.CreateAsync();2var browser = await playwright.Chromium.LaunchAsync(new Microsoft.Playwright.LaunchOptions3{4});5var context = await browser.NewContextAsync();6var page = await context.NewPageAsync();7var result = await page.EvalOnSelectorAsync("input[name='q']", "element => element.value");8await browser.CloseAsync();9var playwright = await Microsoft.Playwright.Playwright.CreateAsync();10var browser = await playwright.Chromium.LaunchAsync(new Microsoft.Playwright.LaunchOptions11{12});13var context = await browser.NewContextAsync();14var page = await context.NewPageAsync();15var result = await page.EvalOnSelectorAllAsync("input[name='q']", "elements => elements.length");16await browser.CloseAsync();17var playwright = await Microsoft.Playwright.Playwright.CreateAsync();18var browser = await playwright.Chromium.LaunchAsync(new Microsoft.Playwright.LaunchOptions19{20});21var context = await browser.NewContextAsync();22var page = await context.NewPageAsync();

EvalOnSelectorAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2var frame = await page.MainFrameAsync();3var result = await frame.EvalOnSelectorAsync("input[name=q]", "e => e.value");4Console.WriteLine(result);5var page = await browser.NewPageAsync();6var frame = await page.MainFrameAsync();7var result = await frame.EvalOnSelectorAllAsync("input", "e => e.length");8Console.WriteLine(result);9var page = await browser.NewPageAsync();10var frame = await page.MainFrameAsync();11var result = await frame.EvaluateAsync("() => 1 + 2");12Console.WriteLine(result);13var page = await browser.NewPageAsync();14var frame = await page.MainFrameAsync();15var result = await frame.EvaluateHandleAsync("() => document.body");16Console.WriteLine(result);17var page = await browser.NewPageAsync();18var frame = await page.MainFrameAsync();19await frame.FillAsync("input[name=q]", "hello");20var page = await browser.NewPageAsync();21var frame = await page.MainFrameAsync();22await frame.FocusAsync("input[name=q]");23var page = await browser.NewPageAsync();24var frame = await page.MainFrameAsync();25var result = await frame.GetAttributeAsync("input[name=q]", "value");26Console.WriteLine(result);

EvalOnSelectorAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions { Headless = false });10            var page = await browser.NewPageAsync();11            var search = await page.QuerySelectorAsync("#searchInput");12            var value = await search.EvalOnSelectorAsync<string>("input", "input => input.value");13            Console.WriteLine(value);14        }15    }16}17public Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg = null)

EvalOnSelectorAsync

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Threading.Tasks;4using Microsoft.Playwright;5{6    {7        static async Task Main(string[] args)8        {9            await using var playwright = await Playwright.CreateAsync();10            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions11            {12            });13            var context = await browser.NewContextAsync();14            var page = await context.NewPageAsync();15            var input = await page.QuerySelectorAsync("input[name='search']");16            await input.TypeAsync("Playwright");17            var searchButton = await page.QuerySelectorAsync("button[type='submit']");18            await searchButton.ClickAsync();19            var elementHandle = await page.EvalOnSelectorAsync("a[href='/wiki/Playwright_(software)']", "(element) => element");20            await elementHandle.ClickAsync();21            await page.CloseAsync();22        }23    }24}

EvalOnSelectorAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync();10            var page = await browser.NewPageAsync();11            await page.EvaluateAsync(@"() => {12                var x = 1;13                var y = 2;14                var z = x + y;15            }");16            var handle = await page.EvalOnSelectorAsync(@"body", @"(element) => {17                return z;18            }");19            var value = await handle.JsonValueAsync();20            Console.WriteLine(value);21        }22    }23}

EvalOnSelectorAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var context = await browser.NewContextAsync();13            var page = await context.NewPageAsync();14            await page.ClickAsync("text=Sign in");15            await page.ClickAsync("text=Create account");16            await page.FillAsync("input[name=\"firstName\"]", "John");17            await page.FillAsync("input[name=\"lastName\"]", "Doe");18            await page.FillAsync("input[name=\"Username\"]", "johndoe");19            await page.FillAsync("input[name=\"Passwd\"]", "johndoe");20            await page.FillAsync("input[name=\"ConfirmPasswd\"]", "johndoe");21            await page.ClickAsync("text=Next");22            await page.ClickAsync("text=Next");23            await page.ClickAsync("text=I agree");24            await page.ClickAsync("text=Next");

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.