How to use EvaluateExpressionHandleAsync method of PuppeteerSharp.Worker class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Worker.EvaluateExpressionHandleAsync

Page.cs

Source:Page.cs

...329        /// <remarks>330        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.331        /// </remarks>332        /// <returns>Task which resolves to script return value</returns>333        public async Task<JSHandle> EvaluateExpressionHandleAsync(string script)334        {335            var context = await MainFrame.GetExecutionContextAsync().ConfigureAwait(false);336            return await context.EvaluateExpressionHandleAsync(script).ConfigureAwait(false);337        }338        /// <summary>339        /// Executes a script in browser context340        /// </summary>341        /// <param name="pageFunction">Script to be evaluated in browser context</param>342        /// <param name="args">Function arguments</param>343        /// <remarks>344        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.345        /// <see cref="JSHandle"/> instances can be passed as arguments346        /// </remarks>347        /// <returns>Task which resolves to script return value</returns>348        public async Task<JSHandle> EvaluateFunctionHandleAsync(string pageFunction, params object[] args)349        {350            var context = await MainFrame.GetExecutionContextAsync().ConfigureAwait(false);...

TargetTests.cs

Source:TargetTests.cs

...81                createdTargetTaskCompletion.SetResult(e.Target);82                Browser.TargetCreated -= TargetCreatedEventHandler;83            }84            Browser.TargetCreated += TargetCreatedEventHandler;85            var registration = await Page.EvaluateExpressionHandleAsync("navigator.serviceWorker.register('sw.js')");86            var createdTarget = await createdTargetTaskCompletion.Task;87            Assert.Equal("service_worker", createdTarget.Type);88            Assert.Equal(TestConstants.ServerUrl + "/sw.js", createdTarget.Url);89            var targetDestroyedTaskCompletion = new TaskCompletionSource<Target>();90            void TargetDestroyedEventHandler(object sender, TargetChangedArgs e)91            {92                targetDestroyedTaskCompletion.SetResult(e.Target);93                Browser.TargetDestroyed -= TargetDestroyedEventHandler;94            }95            Browser.TargetDestroyed += TargetDestroyedEventHandler;96            await Page.EvaluateFunctionAsync("registration => registration.unregister()", registration);97            Assert.Equal(createdTarget, await targetDestroyedTaskCompletion.Task);98        }99        [Fact]100        public async Task ShouldReportWhenATargetUrlChanges()101        {102            await Page.GoToAsync(TestConstants.EmptyPage);103            var changedTargetTaskCompletion = new TaskCompletionSource<Target>();104            void ChangedTargetEventHandler(object sender, TargetChangedArgs e)105            {106                changedTargetTaskCompletion.SetResult(e.Target);107                Browser.TargetChanged -= ChangedTargetEventHandler;108            }109            Browser.TargetChanged += ChangedTargetEventHandler;110            await Page.GoToAsync(TestConstants.CrossProcessUrl + "/");111            var changedTarget = await changedTargetTaskCompletion.Task;112            Assert.Equal(TestConstants.CrossProcessUrl + "/", changedTarget.Url);113            changedTargetTaskCompletion = new TaskCompletionSource<Target>();114            Browser.TargetChanged += ChangedTargetEventHandler;115            await Page.GoToAsync(TestConstants.EmptyPage);116            changedTarget = await changedTargetTaskCompletion.Task;117            Assert.Equal(TestConstants.EmptyPage, changedTarget.Url);118        }119        [Fact]120        public async Task ShouldNotReportUninitializedPages()121        {122            var targetChanged = false;123            EventHandler<TargetChangedArgs> listener = (sender, e) => targetChanged = true;124            Browser.TargetChanged += listener;125            var targetCompletionTask = new TaskCompletionSource<Target>();126            void TargetCreatedEventHandler(object sender, TargetChangedArgs e)127            {128                targetCompletionTask.SetResult(e.Target);129                Browser.TargetCreated -= TargetCreatedEventHandler;130            }131            Browser.TargetCreated += TargetCreatedEventHandler;132            var newPageTask = Browser.NewPageAsync();133            var target = await targetCompletionTask.Task;134            Assert.Equal(TestConstants.AboutBlank, target.Url);135            var newPage = await newPageTask;136            targetCompletionTask = new TaskCompletionSource<Target>();137            Browser.TargetCreated += TargetCreatedEventHandler;138            var evaluateTask = newPage.EvaluateExpressionHandleAsync("window.open('about:blank')");139            var target2 = await targetCompletionTask.Task;140            Assert.Equal(TestConstants.AboutBlank, target2.Url);141            await evaluateTask;142            await newPage.CloseAsync();143            Assert.False(targetChanged, "target should not be reported as changed");144            Browser.TargetChanged -= listener;145        }146        [Fact]147        public async Task ShouldNotCrashWhileRedirectingIfOriginalRequestWasMissed()148        {149            var serverResponseEnd = new TaskCompletionSource<bool>();150            var serverResponse = (HttpResponse)null;151            Server.SetRoute("/one-style.css", context => { serverResponse = context.Response; return serverResponseEnd.Task; });152            // Open a new page. Use window.open to connect to the page later....

Worker.cs

Source:Worker.cs

...83        /// <remarks>84        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.85        /// </remarks>86        /// <returns>Task which resolves to script return value</returns>87        /// <seealso cref="ExecutionContext.EvaluateExpressionHandleAsync(string)"/>88        public async Task<JSHandle> EvaluateExpressionHandleAsync(string script)89            => await (await ExecutionContextTask.ConfigureAwait(false)).EvaluateExpressionHandleAsync(script).ConfigureAwait(false);90        internal Task<ExecutionContext> ExecutionContextTask => _executionContextCallback.Task;91        internal async void OnMessageReceived(object sender, MessageEventArgs e)92        {93            switch (e.MessageID)94            {95                case "Runtime.executionContextCreated":96                    OnExecutionContextCreated(e);97                    break;98                case "Runtime.consoleAPICalled":99                    await OnConsoleAPICalled(e).ConfigureAwait(false);100                    break;101                case "Runtime.exceptionThrown":102                    OnExceptionThrown(e);103                    break;...

EvaluateExpressionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions9            {10                Args = new[] { "--start-maximized" }11            });12            var page = await browser.NewPageAsync();13            var worker = await page.WaitForWorkerAsync();14            var result = await worker.EvaluateExpressionHandleAsync("document.body.innerHTML");15            Console.WriteLine(result);16            Console.ReadLine();17        }18    }19}20{21  result: {

EvaluateExpressionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions9            {10                Args = new string[] { "--no-sandbox" }11            });12            var page = await browser.NewPageAsync();13            await page.EvaluateExpressionHandleAsync("() => { return 1 + 2 }");14            await browser.CloseAsync();15        }16    }17}18using System;19using System.Threading.Tasks;20using PuppeteerSharp;21{22    {23        static async Task Main(string[] args)24        {25            var browser = await Puppeteer.LaunchAsync(new LaunchOptions26            {27                Args = new string[] { "--no-sandbox" }28            });29            var page = await browser.NewPageAsync();30            await Task.WhenAny(page.CloseAsync(), page.EvaluateExpressionHandleAsync("() => { return 1 + 2 }"));31            await browser.CloseAsync();32        }33    }34}

EvaluateExpressionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            {9            };10            using (var browser = await Puppeteer.LaunchAsync(options))11            {12                var page = await browser.NewPageAsync();13                var windowHandle = await page.EvaluateExpressionHandleAsync("window");14                var documentHandle = await page.EvaluateExpressionHandleAsync("document");15                var bodyHandle = await page.EvaluateExpressionHandleAsync("document.body");16                var html = await page.EvaluateExpressionAsync<string>("document.body.innerHTML");17                Console.WriteLine(html);18                await browser.CloseAsync();19            }20        }21    }22}

EvaluateExpressionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions9            {10            });11            var page = await browser.NewPageAsync();12            await page.EvaluateFunctionAsync(@"13                () => {14                }15            ");16            var worker = page.Workers[0];17            var result = await worker.EvaluateExpressionHandleAsync("1 + 2");18            Console.WriteLine(await result.JsonValueAsync());19        }20    }21}22using System;23using System.Threading.Tasks;24using PuppeteerSharp;25{26    {27        static async Task Main(string[] args)28        {29            var browser = await Puppeteer.LaunchAsync(new LaunchOptions30            {31            });32            var page = await browser.NewPageAsync();33            await page.EvaluateFunctionAsync(@"34                () => {35                }36            ");37            var worker = page.Workers[0];38            var result = await worker.EvaluateExpressionHandleAsync("document.body");39            Console.WriteLine(await result.JsonValueAsync());40        }41    }42}43using System;44using System.Threading.Tasks;45using PuppeteerSharp;46{47    {48        static async Task Main(string[] args)49        {50            var browser = await Puppeteer.LaunchAsync(new LaunchOptions51            {52            });53            var page = await browser.NewPageAsync();

EvaluateExpressionHandleAsync

Using AI Code Generation

1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3    Args = new string[] { "--start-maximized" }4});5var page = await browser.NewPageAsync();6await page.WaitForSelectorAsync("input[title='Search']");7await page.ClickAsync("input[title='Search']");8await page.TypeAsync("input[title='Search']", "Puppeteer");9await page.Keyboard.PressAsync("Enter");10await page.WaitForSelectorAsync("div#search");11await page.ClickAsync("div#search");12await page.WaitForSelectorAsync("div.devsite-nav-title");13var title = await page.EvaluateExpressionAsync<string>("document.querySelector('div.devsite-nav-title').innerText");14Console.WriteLine(title);15await page.WaitForSelectorAsync("div.devsite-nav-title");16var titleHandle = await page.EvaluateExpressionHandleAsync("document.querySelector('div.devsite-nav-title')");17var title = await titleHandle.JsonValueAsync();18Console.WriteLine(title);19await page.WaitForSelectorAsync("div.devsite-nav-title");20var titleHandle = await page.EvaluateExpressionHandleAsync("document.querySelector('div.devsite-nav-title')");21var title = await titleHandle.JsonValueAsync<string>();22Console.WriteLine(title);23await page.WaitForSelectorAsync("div.devsite-nav-title");24var titleHandle = await page.EvaluateExpressionHandleAsync("document.querySelector('div.devsite-nav-title')");25var title = await titleHandle.JsonValueAsync<string>();26Console.WriteLine(title);27await page.WaitForSelectorAsync("div.devsite-nav-title");28var titleHandle = await page.EvaluateExpressionHandleAsync("document.querySelector('div.devsite-nav-title')");29var title = await titleHandle.JsonValueAsync<string>();30Console.WriteLine(title);31await page.WaitForSelectorAsync("div.devsite-nav-title");32var titleHandle = await page.EvaluateExpressionHandleAsync("document.querySelector('div.devsite-nav-title')");33var title = await titleHandle.JsonValueAsync();34Console.WriteLine(title);35await page.WaitForSelectorAsync("div.devsite-nav-title");36var titleHandle = await page.EvaluateExpressionHandleAsync("document.querySelector('div.devsite-nav-title')");

EvaluateExpressionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });9            var page = await browser.NewPageAsync();10            var worker = await page.WorkerAsync();11            var expressionHandle = await worker.EvaluateExpressionHandleAsync("1+1");12            var result = await expressionHandle.JsonValueAsync();13            Console.WriteLine(result

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