Best Puppeteer-sharp code snippet using PuppeteerSharp.Page.EvaluateExpressionHandleAsync
GeneratePdf.cs
Source:GeneratePdf.cs
...75 Width = width,76 Height = 108077 });78 // dimensions = await page.EvaluateExpressionAsync<string>(jsWidth);79 await page.EvaluateExpressionHandleAsync("document.fonts.ready"); // Wait for fonts to be loaded. Omitting this might result in no text rendered in pdf.80 // use the screen mode for viewing the web page81 await page.EmulateMediaTypeAsync(PuppeteerSharp.Media.MediaType.Screen);82 // define some options83 var options = new PdfOptions()84 {85 Width = width,86 Height = 1080,87 Format = PuppeteerSharp.Media.PaperFormat.Letter,88 DisplayHeaderFooter = false,89 PrintBackground = printBackground90 };91 // throws an error if margin is less than 1092 if (margin >= 10)93 {...
Program.cs
Source:Program.cs
...45 output.OutputInAscii("Wordle");46 page = await browser.NewPageAsync();47 await page.GoToAsync(wordleUrl);48 var element = await49 page.EvaluateExpressionHandleAsync(50 "document.querySelector(\"body > game-app\").shadowRoot.querySelector(\"#game > game-modal\")" +51 ".shadowRoot.querySelector(\"div > div > div > game-icon\")" +52 ".shadowRoot.querySelector(\"svg\")") as ElementHandle;53 await Task.Delay(100);54 await element?.ClickAsync()!;55 List<string> colors = new(5);56 var wordle = new Wordle(currentWord);57 var completed = false;58 var attempt = 0;59// number of attempts to find a word - 6 is the max60// also means to increment the row count by 1 to read next word61 for (var i = 1; i < 7; i++)62 {63 await page.TypeAsync("body > game-app", currentWord);...
CheckoutTests.cs
Source:CheckoutTests.cs
...20 var bestPrice = await page.EvaluateFunctionAsync<string>(@"() => {21 var elements = document.querySelectorAll('.main-content .price-amount');22 return elements.length ? elements[0].innerText : '0';23 }");24 var clickElement = await page.EvaluateExpressionHandleAsync(@"25 document.querySelectorAll('.main-content buy-button:first-child A')[0]") as ElementHandle;26 await clickElement.ClickAsync();27 await page.WaitForSelectorAsync(".price-container .amount");28 var checkoutPrice = await page.EvaluateExpressionAsync<string>(@"29 document.querySelectorAll('.price-container .amount')[0].innerText30 ");31 Assert.Equal(bestPrice, checkoutPrice);32 }33 }34 }35}
...
JsonValueTests.cs
Source:JsonValueTests.cs
...12 }13 [Fact]14 public async Task ShouldWork()15 {16 var aHandle = await Page.EvaluateExpressionHandleAsync("({ foo: 'bar'})");17 var json = await aHandle.JsonValueAsync();18 Assert.Equal(JObject.Parse("{ foo: 'bar' }"), json);19 }20 [Fact]21 public async Task ShouldNotWorkWithDates()22 {23 var dateHandle = await Page.EvaluateExpressionHandleAsync("new Date('2017-09-26T00:00:00.000Z')");24 var json = await dateHandle.JsonValueAsync();25 Assert.Equal(JObject.Parse("{}"), json);26 }27 [Fact]28 public async Task ShouldThrowForCircularObjects()29 {30 var windowHandle = await Page.EvaluateExpressionHandleAsync("window");31 var exception = await Assert.ThrowsAsync<MessageException>(()32 => windowHandle.JsonValueAsync());33 Assert.Contains("Object reference chain is too long", exception.Message);34 }35 }36}...
AsElementTests.cs
Source:AsElementTests.cs
...11 }12 [Fact]13 public async Task ShouldWork()14 {15 var aHandle = await Page.EvaluateExpressionHandleAsync("document.body");16 var element = aHandle as ElementHandle;17 Assert.NotNull(element);18 }19 [Fact]20 public async Task ShouldReturnNullForNonElements()21 {22 var aHandle = await Page.EvaluateExpressionHandleAsync("2");23 var element = aHandle as ElementHandle;24 Assert.Null(element);25 }26 [Fact]27 public async Task ShouldReturnElementHandleForTextNodes()28 {29 await Page.SetContentAsync("<div>ee!</div>");30 var aHandle = await Page.EvaluateExpressionHandleAsync("document.querySelector('div').firstChild");31 var element = aHandle as ElementHandle;32 Assert.NotNull(element);33 Assert.NotNull(await Page.EvaluateFunctionAsync("e => e.nodeType === HTMLElement.TEXT_NODE", element));34 }35 }36}...
PuppeteerExtensions.cs
Source:PuppeteerExtensions.cs
...7 #region Methods8 public static async Task<ElementHandle> QuerySelectorByXPath(this Page page, string xpath)9 {10 var script = $"document.evaluate('{xpath}', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;";11 var handle = await page.EvaluateExpressionHandleAsync(script).ConfigureAwait(false);12 if (handle is ElementHandle element)13 {14 return element;15 }16 await handle.DisposeAsync().ConfigureAwait(false);17 return null;18 }19 20 public static async Task<ElementHandle> QuerySelectorByXPath(this Frame frame, string xpath)21 {22 var script = $"document.evaluate('{xpath}', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;";23 var handle = await frame.EvaluateExpressionHandleAsync(script).ConfigureAwait(false);24 if (handle is ElementHandle element)25 {26 return element;27 }28 await handle.DisposeAsync().ConfigureAwait(false);29 return null;30 }31 #endregion32 }33}...
ToStringTests.cs
Source:ToStringTests.cs
...11 }12 [Fact]13 public async Task ShouldWorkForPrimitives()14 {15 var numberHandle = await Page.EvaluateExpressionHandleAsync("2");16 Assert.Equal("JSHandle:2", numberHandle.ToString());17 var stringHandle = await Page.EvaluateExpressionHandleAsync("'a'");18 Assert.Equal("JSHandle:a", stringHandle.ToString());19 }20 [Fact]21 public async Task ShouldWorkForComplicatedObjects()22 {23 var aHandle = await Page.EvaluateExpressionHandleAsync("window");24 Assert.Equal("JSHandle@object", aHandle.ToString());25 }26 }27}...
MouseHelper.cs
Source:MouseHelper.cs
...11 public static async Task InstallMouseHelper(Page page)12 {13 var path = Path.Combine(Environment.CurrentDirectory, "GhostCursor", "follow-cursor.js"); 14 string jsContent = await File.ReadAllTextAsync(path);15 await page.EvaluateExpressionHandleAsync(jsContent);16 }17 }18}...
EvaluateExpressionHandleAsync
Using AI Code Generation
1var page = await browser.NewPageAsync();2await page.EvaluateExpressionHandleAsync("document");3await page.EvaluateExpressionHandleAsync("() => document");4var page = await browser.NewPageAsync();5await page.MainFrame.EvaluateExpressionHandleAsync("document");6await page.MainFrame.EvaluateExpressionHandleAsync("() => document");7var page = await browser.NewPageAsync();8var documentHandle = await page.EvaluateExpressionHandleAsync("document");9var bodyHandle = await page.EvaluateExpressionHandleAsync("() => document.body");10var htmlHandle = await page.EvaluateExpressionHandleAsync("() => document.documentElement");11var page = await browser.NewPageAsync();12var documentHandle = await page.EvaluateExpressionHandleAsync("document");13var bodyHandle = await page.EvaluateExpressionHandleAsync("() => document.body");14var htmlHandle = await page.EvaluateExpressionHandleAsync("() => document.documentElement");15var bodyHtmlHandle = await bodyHandle.EvaluateExpressionHandleAsync("() => document.documentElement");16var page = await browser.NewPageAsync();17var documentHandle = await page.EvaluateExpressionHandleAsync("document");18var bodyHandle = await page.EvaluateExpressionHandleAsync("() => document.body");19var htmlHandle = await page.EvaluateExpressionHandleAsync("() => document.documentElement");20var bodyHtmlHandle = await bodyHandle.EvaluateExpressionHandleAsync("() => document.documentElement");21var context = await page.GetContextAsync();22var bodyHtmlHandle2 = await context.EvaluateExpressionHandleAsync("() => document.documentElement");23var page = await browser.NewPageAsync();24var documentHandle = await page.EvaluateExpressionHandleAsync("
EvaluateExpressionHandleAsync
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 });12 var page = await browser.NewPageAsync();13 var handle = await page.EvaluateExpressionHandleAsync("document");14 Console.WriteLine(await handle.JsonValueAsync());15 await browser.CloseAsync();16 }17 }18}19{20 "objectId": "{\"injectedScriptId\":3,\"id\":1}"21}
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 options = new LaunchOptions { Headless = false };9 var browser = await Puppeteer.LaunchAsync(options);10 var page = await browser.NewPageAsync();11 var expressionHandle = await page.EvaluateExpressionHandleAsync("document.body");12 var expression = await page.EvaluateFunctionAsync<string>("e => e.nodeName", expressionHandle);13 Console.WriteLine(expression);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 options = new LaunchOptions { Headless = false };26 var browser = await Puppeteer.LaunchAsync(options);27 var page = await browser.NewPageAsync();28 var expressionHandle = await page.EvaluateExpressionHandleAsync("document.body");29 var expression = await page.EvaluateFunctionAsync<string>("e => e.nodeName", expressionHandle);30 var body = expression;31 Console.WriteLine(body);32 await browser.CloseAsync();33 }34 }35}
EvaluateExpressionHandleAsync
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });10 var page = await browser.NewPageAsync();11 var result = await page.EvaluateExpressionHandleAsync("document.title");12 Console.WriteLine(result);13 await browser.CloseAsync();14 }15 }16}
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 options = new LaunchOptions { Headless = false };9 using (var browser = await Puppeteer.LaunchAsync(options))10 {11 var page = await browser.NewPageAsync();12 var result = await page.EvaluateExpressionHandleAsync<string>("2 + 2");13 Console.WriteLine(result.ToString());14 var result2 = await page.EvaluateExpressionHandleAsync<string>("await 2 + 2");15 Console.WriteLine(result2.ToString());16 var result3 = await page.EvaluateExpressionHandleAsync<string>("return await 2 + 2");17 Console.WriteLine(result3.ToString());18 var result4 = await page.EvaluateExpressionHandleAsync<string>("return await 2 + await 2");19 Console.WriteLine(result4.ToString());20 var result5 = await page.EvaluateExpressionHandleAsync<string>("var x = 2; return await x + await x");21 Console.WriteLine(result5.ToString());22 var result6 = await page.EvaluateExpressionHandleAsync<string>("var x = 2; var y = 2; return await x + await y");23 Console.WriteLine(result6.ToString());24 var result7 = await page.EvaluateExpressionHandleAsync<string>("var x = 2; var y = 2; return await x + await y + await z", new { z =
Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!