How to use EvaluateExpressionAsync method of PuppeteerSharp.Frame class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Frame.EvaluateExpressionAsync

Methods.cs

Source:Methods.cs

...20            data.Logger.LogHeader();21            var elemScript = GetElementScript(findBy, identifier, index);22            var frame = GetFrame(data);23            var script = elemScript + $".setAttribute('{attributeName}', '{value}');";24            await frame.EvaluateExpressionAsync(script);25            data.Logger.Log($"Set value {value} of attribute {attributeName} by executing {script}", LogColors.DarkSalmon);26        }27        [Block("Types text in an input field", name = "Type")]28        public static async Task PuppeteerTypeElement(BotData data, FindElementBy findBy, string identifier, int index,29            string text, int timeBetweenKeystrokes = 0)30        {31            data.Logger.LogHeader();32            var frame = GetFrame(data);33            var elem = await GetElement(frame, findBy, identifier, index);34            await elem.TypeAsync(text, new PuppeteerSharp.Input.TypeOptions { Delay = timeBetweenKeystrokes });35            data.Logger.Log($"Typed {text}", LogColors.DarkSalmon);36        }37        [Block("Types text in an input field with human-like random delays", name = "Type Human")]38        public static async Task PuppeteerTypeElementHuman(BotData data, FindElementBy findBy, string identifier, int index,39            string text)40        {41            data.Logger.LogHeader();42            var frame = GetFrame(data);43            var elem = await GetElement(frame, findBy, identifier, index);44            foreach (var c in text)45            {46                await elem.TypeAsync(c.ToString());47                await Task.Delay(data.Random.Next(100, 300)); // Wait between 100 and 300 ms (average human type speed is 60 WPM ~ 360 CPM)48            }49            data.Logger.Log($"Typed {text}", LogColors.DarkSalmon);50        }51        [Block("Clicks an element", name = "Click")]52        public static async Task PuppeteerClick(BotData data, FindElementBy findBy, string identifier, int index,53            PuppeteerSharp.Input.MouseButton mouseButton = PuppeteerSharp.Input.MouseButton.Left, int clickCount = 1,54            int timeBetweenClicks = 0)55        {56            data.Logger.LogHeader();57            var frame = GetFrame(data);58            var elem = await GetElement(frame, findBy, identifier, index);59            await elem.ClickAsync(new PuppeteerSharp.Input.ClickOptions { Button = mouseButton, ClickCount = clickCount, Delay = timeBetweenClicks });60            data.Logger.Log($"Clicked {clickCount} time(s) with {mouseButton} button", LogColors.DarkSalmon);61        }62        [Block("Submits a form", name = "Submit")]63        public static async Task PuppeteerSubmit(BotData data, FindElementBy findBy, string identifier, int index)64        {65            data.Logger.LogHeader();66            var elemScript = GetElementScript(findBy, identifier, index);67            var frame = GetFrame(data);68            var script = elemScript + ".submit();";69            await frame.EvaluateExpressionAsync(script);70            data.Logger.Log($"Submitted the form by executing {script}", LogColors.DarkSalmon);71        }72        [Block("Selects a value in a select element", name = "Select")]73        public static async Task PuppeteerSelect(BotData data, FindElementBy findBy, string identifier, int index, string value)74        {75            data.Logger.LogHeader();76            var frame = GetFrame(data);77            var elem = await GetElement(frame, findBy, identifier, index);78            await elem.SelectAsync(value);79            data.Logger.Log($"Selected value {value}", LogColors.DarkSalmon);80        }81        [Block("Selects a value by index in a select element", name = "Select by Index")]82        public static async Task PuppeteerSelectByIndex(BotData data, FindElementBy findBy, string identifier, int index, int selectionIndex)83        {84            data.Logger.LogHeader();85            var frame = GetFrame(data);86            var elemScript = GetElementScript(findBy, identifier, index);87            var script = elemScript + $".getElementsByTagName('option')[{selectionIndex}].value;";88            var value = (await frame.EvaluateExpressionAsync(script)).ToString();89            var elem = await GetElement(frame, findBy, identifier, index);90            await elem.SelectAsync(value);91            data.Logger.Log($"Selected value {value}", LogColors.DarkSalmon);92        }93        [Block("Selects a value by text in a select element", name = "Select by Text")]94        public static async Task PuppeteerSelectByText(BotData data, FindElementBy findBy, string identifier, int index, string text)95        {96            data.Logger.LogHeader();97            var frame = GetFrame(data);98            var elemScript = GetElementScript(findBy, identifier, index);99            var script = $"el={elemScript};for(let i=0;i<el.options.length;i++){{if(el.options[i].text=='{text}'){{el.selectedIndex = i;break;}}}}";100            await frame.EvaluateExpressionAsync(script);101            data.Logger.Log($"Selected text {text}", LogColors.DarkSalmon);102        }103        [Block("Gets the value of an attribute of an element", name = "Get Attribute Value")]104        public static async Task<string> PuppeteerGetAttributeValue(BotData data, FindElementBy findBy, string identifier, int index,105            string attributeName = "innerText")106        {107            data.Logger.LogHeader();108            var elemScript = GetElementScript(findBy, identifier, index);109            var frame = GetFrame(data);110            var script = $"{elemScript}.{attributeName};";111            var value = await frame.EvaluateExpressionAsync<string>(script);112            data.Logger.Log($"Got value {value} of attribute {attributeName} by executing {script}", LogColors.DarkSalmon);113            return value;114        }115        [Block("Gets the values of an attribute of multiple elements", name = "Get Attribute Value All")]116        public static async Task<List<string>> PuppeteerGetAttributeValueAll(BotData data, FindElementBy findBy, string identifier,117            string attributeName = "innerText")118        {119            data.Logger.LogHeader();120            var elemScript = GetElementsScript(findBy, identifier);121            var frame = GetFrame(data);122            var script = $"Array.prototype.slice.call({elemScript}).map((item) => item.{attributeName})";123            var values = await frame.EvaluateExpressionAsync<string[]>(script);124            data.Logger.Log($"Got {values.Length} values for attribute {attributeName} by executing {script}", LogColors.DarkSalmon);125            return values.ToList();126        }127        [Block("Checks if an element is currently being displayed on the page", name = "Is Displayed")]128        public static async Task<bool> PuppeteerIsDisplayed(BotData data, FindElementBy findBy, string identifier, int index)129        {130            data.Logger.LogHeader();131            var elemScript = GetElementScript(findBy, identifier, index);132            var frame = GetFrame(data);133            var script = $"window.getComputedStyle({elemScript}).display !== 'none';";134            var displayed = await frame.EvaluateExpressionAsync<bool>(script);135            data.Logger.Log($"Found out the element is{(displayed ? "" : " not")} displayed by executing {script}", LogColors.DarkSalmon);136            return displayed;137        }138        [Block("Checks if an element exists on the page", name = "Exists")]139        public static async Task<bool> PuppeteerExists(BotData data, FindElementBy findBy, string identifier, int index)140        {141            data.Logger.LogHeader();142            var elemScript = GetElementScript(findBy, identifier, index);143            var frame = GetFrame(data);144            var script = $"window.getComputedStyle({elemScript}).display !== 'none';";145            try146            {147                var displayed = await frame.EvaluateExpressionAsync<bool>(script);148                data.Logger.Log("The element exists", LogColors.DarkSalmon);149                return true;150            }151            catch152            {153                data.Logger.Log("The element does not exist", LogColors.DarkSalmon);154                return false;155            }156        }157        [Block("Uploads one or more files to the selected element", name = "Upload Files")]158        public static async Task PuppeteerUploadFiles(BotData data, FindElementBy findBy, string identifier, int index, List<string> filePaths)159        {160            data.Logger.LogHeader();161            var frame = GetFrame(data);...

PuppeteerMethods.cs

Source:PuppeteerMethods.cs

...171        public static async Task<List<string>> VideoLinkList(Page page)172        {173            WaitUntilNavigation[] waitUntil = new[] { WaitUntilNavigation.Networkidle0, WaitUntilNavigation.Networkidle2, WaitUntilNavigation.DOMContentLoaded, WaitUntilNavigation.Load };            174            var next = @"document.getElementById('pnnext')";175            var nexts = await page.EvaluateExpressionAsync<object>(next);176            var linkList = new List<string>();177            var isLastPage = (nexts == null);178            while ((nexts != null) || !isLastPage)179            {180                var jsSelectAllAnchors = @"Array.from(document.querySelectorAll('.g'))";181                var urls = await page.EvaluateExpressionAsync<object[]>(jsSelectAllAnchors);182                for (int i = 0; i < urls.Length; i++)183                {184                    var query = $"document.querySelectorAll('.g')[{i}].getElementsByTagName('a')[0].href";185                    linkList.Add(await page.EvaluateExpressionAsync<string>(query));186                }187                nexts = await page.EvaluateExpressionAsync<object>(next);188                if (nexts != null)189                {190                    var nextHref = @"document.getElementById('pnnext').href";191                    var nextHrefUrl = await page.EvaluateExpressionAsync<string>(nextHref);192                    isLastPage = (nexts == null) && !string.IsNullOrEmpty(nextHrefUrl);193                    await page.GoToAsync(nextHrefUrl, new NavigationOptions { WaitUntil = waitUntil });194                    nexts = await page.EvaluateExpressionAsync<object>(next);195                }196                else197                {198                    isLastPage = true;199                }200            }201            return linkList;202        } 203        public static async Task<PuppeteerDataResult<List<string>>> GetVideoSearchVideoResultUrlList(string url, string searchWord)204        {205            using (var page = await OpenChromiumPage())206            {207                WaitUntilNavigation[] waitUntil = new[] { WaitUntilNavigation.Networkidle0, WaitUntilNavigation.Networkidle2, WaitUntilNavigation.DOMContentLoaded, WaitUntilNavigation.Load };208                await page.GoToAsync(url, new NavigationOptions { WaitUntil = waitUntil });209                await SearchOnGoogle(searchWord, page);210                //Click Video Tab211                var videoTabElement = @"document.getElementsByClassName('hdtb-mitem')[4].getElementsByTagName('a')[0].href";212                var videoTabLink = await page.EvaluateExpressionAsync<string>(videoTabElement);                213                await page.GoToAsync(videoTabLink, new NavigationOptions { WaitUntil = waitUntil });214                                215                var result= await VideoLinkList(page);                                 216                return new SuccessPuppeteerDataResult<List<string>>(result, "Get Title Successfully");               217            }218        }219        public static async Task<PuppeteerDataResult<string>> GetSearchStaticticDetail(string url, string searchWord)220        {221            using (var page = await OpenChromiumPage())222            {223                WaitUntilNavigation[] waitUntil = new[] { WaitUntilNavigation.Networkidle0, WaitUntilNavigation.Networkidle2, WaitUntilNavigation.DOMContentLoaded, WaitUntilNavigation.Load };224                await page.GoToAsync(url, new NavigationOptions { WaitUntil = waitUntil });225                await SearchOnGoogle(searchWord, page);226                var jsExpression = @"document.querySelectorAll('#result-stats')[0].innerHTML";227                var result = await page.EvaluateExpressionAsync<string>(jsExpression);228                return new SuccessPuppeteerDataResult<string>(result, "");229            }230        }231        private static async Task SearchOnGoogle(string searchWord, Page page)232        {233            WaitUntilNavigation[] waitUntil = new[] { WaitUntilNavigation.Networkidle0, WaitUntilNavigation.Networkidle2, WaitUntilNavigation.DOMContentLoaded, WaitUntilNavigation.Load };234            //Search Text Input235            await page.WaitForSelectorAsync("input[name='q']");236            await page.TypeAsync("input[name='q']", searchWord);237            //Search on Google Button and Click Operation238            await page.WaitForSelectorAsync("input[name='btnK']");239            await page.EvaluateExpressionAsync("document.querySelector(\"input[name='btnK']\").click()");240            await page.WaitForNavigationAsync(new NavigationOptions { WaitUntil = waitUntil });241        }242    }243}...

ExposeFunctionTests.cs

Source:ExposeFunctionTests.cs

...12        [Fact]13        public async Task ShouldWork()14        {15            await Page.ExposeFunctionAsync("compute", (int a, int b) => a * b);16            var result = await Page.EvaluateExpressionAsync<int>("compute(9, 4)");17            Assert.Equal(36, result);18        }19        [Fact]20        public async Task ShouldSurviveNavigation()21        {22            await Page.ExposeFunctionAsync("compute", (int a, int b) => a * b);23            await Page.GoToAsync(TestConstants.EmptyPage);24            var result = await Page.EvaluateExpressionAsync<int>("compute(9, 4)");25            Assert.Equal(36, result);26        }27        [Fact]28        public async Task ShouldAwaitReturnedValueTask()29        {30            await Page.ExposeFunctionAsync("compute", (int a, int b) => Task.FromResult(a * b));31            var result = await Page.EvaluateExpressionAsync<int>("compute(3, 5)");32            Assert.Equal(15, result);33        }34        [Fact]35        public async Task ShouldWorkOnFrames()36        {37            await Page.ExposeFunctionAsync("compute", (int a, int b) => Task.FromResult(a * b));38            await Page.GoToAsync(TestConstants.ServerUrl + "/frames/nested-frames.html");39            var frame = Page.Frames[1];40            var result = await frame.EvaluateExpressionAsync<int>("compute(3, 5)");41            Assert.Equal(15, result);42        }43        [Fact]44        public async Task ShouldWorkOnFramesBeforeNavigation()45        {46            await Page.GoToAsync(TestConstants.ServerUrl + "/frames/nested-frames.html");47            await Page.ExposeFunctionAsync("compute", (int a, int b) => Task.FromResult(a * b));48            var frame = Page.Frames[1];49            var result = await frame.EvaluateExpressionAsync<int>("compute(3, 5)");50            Assert.Equal(15, result);51        }52        [Fact]53        public async Task ShouldAwaitReturnedTask()54        {55            bool called = false;56            await Page.ExposeFunctionAsync("changeFlag", () =>57            {58                called = true;59                return Task.CompletedTask;60            });61            await Page.EvaluateExpressionAsync("changeFlag()");62            Assert.True(called);63        }64        [Fact]65        public async Task ShouldWorkWithAction()66        {67            bool called = false;68            await Page.ExposeFunctionAsync("changeFlag", () =>69            {70                called = true;71            });72            await Page.EvaluateExpressionAsync("changeFlag()");73            Assert.True(called);74        }75    }76}

PuppeteerConnectTests.cs

Source:PuppeteerConnectTests.cs

...19            };20            var browser = await Puppeteer.ConnectAsync(options, TestConstants.LoggerFactory);21            using (var page = await browser.NewPageAsync())22            {23                var response = await page.EvaluateExpressionAsync<int>("7 * 8");24                Assert.Equal(56, response);25            }26            using (var originalPage = await Browser.NewPageAsync())27            {28                var response = await originalPage.EvaluateExpressionAsync<int>("7 * 6");29                Assert.Equal(42, response);30            }31        }32        [Fact]33        public async Task ShouldBeAbleToReconnectToADisconnectedBrowser()34        {35            var options = new ConnectOptions()36            {37                BrowserWSEndpoint = Browser.WebSocketEndpoint38            };39            var url = TestConstants.ServerUrl + "/frames/nested-frames.html";40            var page = await Browser.NewPageAsync();41            await page.GoToAsync(url);42            Browser.Disconnect();43            using (var browser = await Puppeteer.ConnectAsync(options, TestConstants.LoggerFactory))44            {45                var pages = (await browser.PagesAsync()).ToList();46                var restoredPage = pages.FirstOrDefault(x => x.Url == url);47                Assert.NotNull(restoredPage);48                var frameDump = FrameUtils.DumpFrames(restoredPage.MainFrame);49                Assert.Equal(TestConstants.NestedFramesDumpResult, frameDump);50                var response = await restoredPage.EvaluateExpressionAsync<int>("7 * 8");51                Assert.Equal(56, response);52            }53        }54    }55}...

FrameEvaluateTests.cs

Source:FrameEvaluateTests.cs

...20            await FrameUtils.AttachFrameAsync(Page, "frame1", TestConstants.EmptyPage);21            Assert.Equal(2, Page.Frames.Count());22            var frame1 = Page.MainFrame;23            var frame2 = Page.FirstChildFrame();24            await frame1.EvaluateExpressionAsync("window.FOO = 'foo'");25            await frame2.EvaluateExpressionAsync("window.FOO = 'bar'");26            Assert.Equal("foo", await frame1.EvaluateExpressionAsync<string>("window.FOO"));27            Assert.Equal("bar", await frame2.EvaluateExpressionAsync<string>("window.FOO"));28        }29        [PuppeteerTest("evaluation.spec.ts", "Frame.evaluate", "should execute after cross-site navigation")]30        [PuppeteerFact]31        public async Task ShouldExecuteAfterCrossSiteNavigation()32        {33            await Page.GoToAsync(TestConstants.EmptyPage);34            var mainFrame = Page.MainFrame;35            Assert.Contains("localhost", await mainFrame.EvaluateExpressionAsync<string>("window.location.href"));36            await Page.GoToAsync(TestConstants.CrossProcessHttpPrefix + "/empty.html");37            Assert.Contains("127", await mainFrame.EvaluateExpressionAsync<string>("window.location.href"));38        }39    }40}...

ExecutionContextTests.cs

Source:ExecutionContextTests.cs

...25            Assert.NotEqual(context1, context2);26            Assert.Equal(Page.MainFrame, context1.Frame);27            Assert.Equal(Page.FirstChildFrame(), context2.Frame);28            await Task.WhenAll(29                context1.EvaluateExpressionAsync("window.a = 1"),30                context2.EvaluateExpressionAsync("window.a = 2")31            );32            var a1 = context1.EvaluateExpressionAsync<int>("window.a");33            var a2 = context2.EvaluateExpressionAsync<int>("window.a");34            await Task.WhenAll(a1, a2);35            Assert.Equal(1, a1.Result);36            Assert.Equal(2, a2.Result);37        }38    }39}

EvaluateTests.cs

Source:EvaluateTests.cs

...17            await FrameUtils.AttachFrameAsync(Page, "frame1", TestConstants.EmptyPage);18            Assert.Equal(2, Page.Frames.Count());19            var frame1 = Page.Frames.ElementAt(0);20            var frame2 = Page.Frames.ElementAt(1);21            await frame1.EvaluateExpressionAsync("window.FOO = 'foo'");22            await frame2.EvaluateExpressionAsync("window.FOO = 'bar'");23            Assert.Equal("foo", await frame1.EvaluateExpressionAsync<string>("window.FOO"));24            Assert.Equal("bar", await frame2.EvaluateExpressionAsync<string>("window.FOO"));25        }26        [Fact]27        public async Task ShouldExecuteAfterCrossSiteNavigation()28        {29            await Page.GoToAsync(TestConstants.EmptyPage);30            var mainFrame = Page.MainFrame;31            Assert.Contains("localhost", await mainFrame.EvaluateExpressionAsync<string>("window.location.href"));32            await Page.GoToAsync(TestConstants.CrossProcessHttpPrefix + "/empty.html");33            Assert.Contains("127", await mainFrame.EvaluateExpressionAsync<string>("window.location.href"));34        }35    }36}...

ContextTests.cs

Source:ContextTests.cs

...20            Assert.NotNull(context1);21            Assert.NotNull(context2);22            Assert.NotEqual(context1, context2);23            await Task.WhenAll(24                context1.EvaluateExpressionAsync("window.a = 1"),25                context2.EvaluateExpressionAsync("window.a = 2")26            );27            var a1 = context1.EvaluateExpressionAsync<int>("window.a");28            var a2 = context2.EvaluateExpressionAsync<int>("window.a");29            await Task.WhenAll(a1, a2);30            Assert.Equal(1, a1.Result);31            Assert.Equal(2, a2.Result);32        }33    }34}

EvaluateExpressionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static void Main(string[] args)7        {8            MainAsync().Wait();9        }10        static async Task MainAsync()11        {12            var browser = await Puppeteer.LaunchAsync(new LaunchOptions13            {14                Args = new string[] { "--no-sandbox" }15            });16            var page = await browser.NewPageAsync();17            var result = await page.EvaluateExpressionAsync<int>("1 + 2");18            Console.WriteLine(result);19            await browser.CloseAsync();20        }21    }22}23public Task<T> EvaluateExpressionAsync<T>(string pageFunction, params object[] args);24using System;25using System.Threading.Tasks;26using PuppeteerSharp;27{28    {29        static void Main(string[] args)30        {31            MainAsync().Wait();32        }33        static async Task MainAsync()34        {

EvaluateExpressionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var options = new LaunchOptions { Headless = false };9            var browser = await Puppeteer.LaunchAsync(options);10            var page = await browser.NewPageAsync();11            var result = await page.EvaluateExpressionAsync("1+2");12            Console.WriteLine(result);13            await browser.CloseAsync();14        }15    }16}17public Task<dynamic> EvaluateExpressionAsync(string pageFunction, params object[] args)18using System;19using System.Threading.Tasks;20using PuppeteerSharp;21{22    {23        static async Task Main(string[] args)24        {25            var options = new LaunchOptions { Headless = false };26            var browser = await Puppeteer.LaunchAsync(options);27            var page = await browser.NewPageAsync();28            var result = await page.EvaluateExpressionAsync("document.querySelector('input[name=q]').value");29            Console.WriteLine(result);30            await browser.CloseAsync();31        }32    }33}34public Task<dynamic> EvaluateFunctionAsync(string pageFunction, params object[] args)35using System;36using System.Threading.Tasks;37using PuppeteerSharp;38{39    {40        static async Task Main(string[] args)41        {

EvaluateExpressionAsync

Using AI Code Generation

1var result = await frame.EvaluateExpressionAsync<double>("1 + 2");2var result = await frame.EvaluateExpressionAsync<bool>("() => Promise.resolve(8 * 7)");3var result = await frame.EvaluateExpressionAsync<bool>("() => Promise.resolve(8 * 7)");4var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");5var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");6var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");7var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");8var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");9var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");10var result = await frame.EvaluateExpressionAsync("() => Promise.resolve(8 * 7)");11var result = await frame.EvaluateExpressionAsync("()

EvaluateExpressionAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2var frame = page.MainFrame;3var result = await frame.EvaluateExpressionAsync("document.title");4Console.WriteLine(result);5var page = await browser.NewPageAsync();6var frame = page.MainFrame;7var result = await frame.EvaluateExpressionHandleAsync("document.title");8Console.WriteLine(result);9var page = await browser.NewPageAsync();10var frame = page.MainFrame;11var result = await frame.EvaluateFunctionAsync("function() { return document.title; }");12Console.WriteLine(result);13var page = await browser.NewPageAsync();14var frame = page.MainFrame;15var result = await frame.EvaluateFunctionHandleAsync("function() { return document.title; }");16Console.WriteLine(result);17var page = await browser.NewPageAsync();18var frame = page.MainFrame;19var result = await frame.EvaluateHandleAsync("document.title");20Console.WriteLine(result);21var page = await browser.NewPageAsync();22var frame = page.MainFrame;23var result = await frame.EvaluateAsync("document.title");24Console.WriteLine(result);25var page = await browser.NewPageAsync();26var result = await page.EvaluateAsync("document.title");27Console.WriteLine(result);28var page = await browser.NewPageAsync();29var result = await page.EvaluateAsync("document.title");

EvaluateExpressionAsync

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            var browser = await Puppeteer.LaunchAsync(launchOptions);11            var page = await browser.NewPageAsync();12            var result = await page.EvaluateExpressionAsync("document.title");13            Console.WriteLine(result);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            {26            };27            var browser = await Puppeteer.LaunchAsync(launchOptions);28            var page = await browser.NewPageAsync();29            var result = await page.EvaluateFunctionAsync("() => document.title");30            Console.WriteLine(result);31            await browser.CloseAsync();32        }33    }34}35using System;36using System.Threading.Tasks;37using PuppeteerSharp;38{39    {40        static async Task Main(string[] args)41        {42            {43            };

EvaluateExpressionAsync

Using AI Code Generation

1var page = await _browser.NewPageAsync();2var frame = page.MainFrame;3var result = await frame.EvaluateExpressionAsync("2+2");4Console.WriteLine(result);5var page = await _browser.NewPageAsync();6var frame = page.MainFrame;7var result = await frame.EvaluateFunctionAsync("() => 2+2");8Console.WriteLine(result);9var page = await _browser.NewPageAsync();10var frame = page.MainFrame;11var result = await frame.EvaluateFunctionAsync("x => x + 2", 2);12Console.WriteLine(result);13var page = await _browser.NewPageAsync();14var frame = page.MainFrame;15var result = await frame.EvaluateExpressionHandleAsync("document.body");16Console.WriteLine(result);17var page = await _browser.NewPageAsync();18var frame = page.MainFrame;19var result = await frame.EvaluateFunctionHandleAsync("() => document.body");20Console.WriteLine(result);21var page = await _browser.NewPageAsync();22var frame = page.MainFrame;23var result = await frame.EvaluateFunctionHandleAsync("x => x + 2", 2);24Console.WriteLine(result);25var page = await _browser.NewPageAsync();26var frame = page.MainFrame;27var result = await frame.EvaluateHandleAsync("document.body");28Console.WriteLine(result);

EvaluateExpressionAsync

Using AI Code Generation

1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3    Args = new string[] { "--start-maximized" }4});5var page = await browser.NewPageAsync();6var result = await page.EvaluateExpressionAsync<string>("document.title");7Console.WriteLine(result);8await browser.CloseAsync();9var browser = await Puppeteer.LaunchAsync(new LaunchOptions10{11    Args = new string[] { "--start-maximized" }12});13var page = await browser.NewPageAsync();14var result = await page.EvaluateExpressionAsync<string>("document.URL");15Console.WriteLine(result);16await browser.CloseAsync();17var browser = await Puppeteer.LaunchAsync(new LaunchOptions18{19    Args = new string[] { "--start-maximized" }20});21var page = await browser.NewPageAsync();22var result = await page.EvaluateExpressionAsync<string>("document.body.innerHTML");23Console.WriteLine(result);24await browser.CloseAsync();25var browser = await Puppeteer.LaunchAsync(new LaunchOptions26{27    Args = new string[] { "--start-maximized" }28});29var page = await browser.NewPageAsync();30var result = await page.EvaluateExpressionAsync<string>("document.body.childNodes.length");31Console.WriteLine(result);32await browser.CloseAsync();

EvaluateExpressionAsync

Using AI Code Generation

1var frame = page.MainFrame;2var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').innerText");3var frame = page.MainFrame;4var result = await frame.EvaluateFunctionAsync<string>("(selector) => document.querySelector(selector).innerText", "h1");5var result = await page.EvaluateExpressionAsync<string>("document.querySelector('h1').innerText");6var result = await page.EvaluateFunctionAsync<string>("(selector) => document.querySelector(selector).innerText", "h1");7var elementHandle = await page.QuerySelectorAsync("h1");8var result = await elementHandle.EvaluateExpressionAsync<string>("node => node.innerText");9var elementHandle = await page.QuerySelectorAsync("h1");10var result = await elementHandle.EvaluateFunctionAsync<string>("(node, selector) => node.querySelector(selector).innerText", "h1");11var result = await page.EvaluateExpressionAsync<string>("document.querySelector('h1').innerText");12var result = await page.EvaluateFunctionAsync<string>("(selector) => document.querySelector(selector).innerText", "h1");13var result = await page.EvaluateExpressionAsync<string>("document.querySelector('h1').innerText");

EvaluateExpressionAsync

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.WaitForSelectorAsync("input[title='Search']");13            var result = await page.EvaluateExpressionAsync<int>("document.querySelectorAll('input[title=\"Search\"]').length");14            Console.WriteLine(result);15            Console.ReadKey();16        }17    }18}19using System;20using System.Threading.Tasks;21using PuppeteerSharp;22{23    {24        static async Task Main(string[] args)25        {26            var browser = await Puppeteer.LaunchAsync(new LaunchOptions27            {28            });29            var page = await browser.NewPageAsync();30            await page.WaitForSelectorAsync("input[title='Search']");31            var result = await page.EvaluateFunctionAsync<int>("() => document.querySelectorAll('input[title=\"Search\"]').length");32            Console.WriteLine(result);33            Console.ReadKey();34        }35    }36}37using System;38using System.Threading.Tasks;39using PuppeteerSharp;40{41    {42        static async Task Main(string[] args)43        {44            var browser = await Puppeteer.LaunchAsync(new LaunchOptions45            {46            });47            var page = await browser.NewPageAsync();48            await page.WaitForSelectorAsync("input[title='Search']");49            var result = await page.EvaluateFunctionAsync<int>("() => { return document.querySelectorAll('input[title=\"Search\"]').length; }");50            Console.WriteLine(result);

EvaluateExpressionAsync

Using AI Code Generation

1var frame = await Page.GetFrameByNameAsync("frame1");2var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').textContent");3Console.WriteLine(result);4var frame = await Page.GetFrameByNameAsync("frame1");5var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').textContent");6Console.WriteLine(result);7var frame = await Page.GetFrameByNameAsync("frame1");8var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').textContent");9Console.WriteLine(result);10var frame = await Page.GetFrameByNameAsync("frame1");11var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').textContent");12Console.WriteLine(result);13var frame = await Page.GetFrameByNameAsync("frame1");14var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').textContent");15Console.WriteLine(result);16var frame = await Page.GetFrameByNameAsync("frame1");17var result = await frame.EvaluateExpressionAsync<string>("document.querySelector('h1').textContent");18Console.WriteLine(result);19var frame = await Page.GetFrameByNameAsync("frame1");20var result = await frame.EvaluateExpressionAsync<string>("

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