How to use WaitForFunctionOptions class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.WaitForFunctionOptions

Examples.cs

Source:Examples.cs Github

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...66 await _page.GoToAsync("https://github.com/hardkoded/puppeteer-sharp");67 await Task.WhenAll(requestTask, responseTask);68 await _page.ClickAsync("h1 > strong > a");69 await _page.WaitForNavigationAsync(new NavigationOptions { Timeout = timeout });70 await _page.WaitForExpressionAsync("1 + 1 === 2", new WaitForFunctionOptions { Timeout = timeout });71 await _page.WaitForFunctionAsync("() => window.location.href === 'https://github.com/hardkoded/puppeteer-sharp'", new WaitForFunctionOptions { Timeout = timeout });72 await _page.WaitForSelectorAsync("#readme", new WaitForSelectorOptions { Timeout = timeout });73 await _page.WaitForXPathAsync("//*[@id='readme']", new WaitForSelectorOptions { Timeout = timeout });74 await _page.WaitForTimeoutAsync(timeout);75 // WaitUntilNavigation76 new NavigationOptions().WaitUntil = new[]77 {78 WaitUntilNavigation.Load,79 WaitUntilNavigation.DOMContentLoaded,80 WaitUntilNavigation.Networkidle0,81 WaitUntilNavigation.Networkidle282 };83 // Frame84 var frame = _page.MainFrame;85 await frame.WaitForExpressionAsync("1 + 1 === 2", new WaitForFunctionOptions { Timeout = timeout });86 await frame.WaitForFunctionAsync("() => window.location.href === 'https://github.com/hardkoded/puppeteer-sharp'", new WaitForFunctionOptions { Timeout = timeout });87 await frame.WaitForSelectorAsync("#readme", new WaitForSelectorOptions { Timeout = timeout });88 await frame.WaitForXPathAsync("//*[@id='readme']", new WaitForSelectorOptions { Timeout = timeout });89 await frame.WaitForTimeoutAsync(timeout);90 }91 [Fact]92 public async Task values_from_Page()93 {94 var url = _page.Url;95 var title = await _page.GetTitleAsync();96 var content = await _page.GetContentAsync();97 var cookies = await _page.GetCookiesAsync();98 }99 [Fact]100 public async Task form()...

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WaitForFunctionTests.cs

Source:WaitForFunctionTests.cs Github

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...15 {16 var success = false;17 var startTime = DateTime.Now;18 var polling = 100;19 var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'", new WaitForFunctionOptions { PollingInterval = polling })20 .ContinueWith(_ => success = true);21 await Page.EvaluateExpressionAsync("window.__FOO = 'hit'");22 Assert.False(success);23 await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");24 await watchdog;25 Assert.True((DateTime.Now - startTime).TotalMilliseconds > polling / 2);26 }27 [Fact]28 public async Task ShouldPollOnMutation()29 {30 var success = false;31 var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'",32 new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Mutation })33 .ContinueWith(_ => success = true);34 await Page.EvaluateExpressionAsync("window.__FOO = 'hit'");35 Assert.False(success);36 await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");37 await watchdog;38 }39 [Fact]40 public async Task ShouldPollOnRaf()41 {42 var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'",43 new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Raf });44 await Page.EvaluateExpressionAsync("window.__FOO = 'hit'");45 await watchdog;46 }47 [Fact]48 public async Task ShouldThrowNegativePollingInterval()49 {50 var exception = await Assert.ThrowsAsync<ArgumentOutOfRangeException>(()51 => Page.WaitForFunctionAsync("() => !!document.body", new WaitForFunctionOptions { PollingInterval = -10 }));52 Assert.Contains("Cannot poll with non-positive interval", exception.Message);53 }54 [Fact]55 public async Task ShouldReturnTheSuccessValueAsAJSHandle()56 {57 Assert.Equal(5, await (await Page.WaitForFunctionAsync("() => 5")).JsonValueAsync<int>());58 }59 [Fact]60 public async Task ShouldReturnTheWindowAsASuccessValue()61 {62 Assert.NotNull(await Page.WaitForFunctionAsync("() => window"));63 }64 [Fact]65 public async Task ShouldAcceptElementHandleArguments()...

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PuppeteerBannerGenerator.cs

Source:PuppeteerBannerGenerator.cs Github

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...38 await StartBrowserAsync();39 using var page = await _browser.NewPageAsync();40 await page.GoToAsync("https://localhost:5001/erikolsson.html?identifier=" + identifier);41 // Wait for window.documentReady to be set to true (needs to be handled by the page after all images have loaded)42 await page.WaitForExpressionAsync("window.documentReady === true", new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Raf });43 // Puppeteer starts with a too small viewport so we need to resize it44 await page.SetViewportAsync(new ViewPortOptions { Width = 1500, Height = 1500 });45 // Get the main element and create a PNG screenshot of it46 var mainElement = await page.QuerySelectorAsync("main");47 using var screenshotStream = await mainElement.ScreenshotStreamAsync(new ScreenshotOptions { Type = ScreenshotType.Png });48 using var ms = new MemoryStream();49 await screenshotStream.CopyToAsync(ms, cancellationToken);50 return ms.ToArray().AsMemory();51 }52 public async ValueTask DisposeAsync() {53 if(_browser != null) {54 await _browser.DisposeAsync();55 }56 }...

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test vueJS - Example1 - Refresh Top System Processes.csx

Source:test vueJS - Example1 - Refresh Top System Processes.csx Github

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...76 ()=> {77 window.programDone = false;78 }79 ");80 await page.WaitForExpressionAsync("window.programDone === true", new WaitForFunctionOptions{81 Timeout = 0 // disable the timeout82 });83 Console.WriteLine("Program finished triggered");84 // program is done so close everything out85 await page.CloseAsync();86 await browser.CloseAsync();87}88await waitForProgramEnd();...

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ScreenshotService.cs

Source:ScreenshotService.cs Github

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...36 }37 var browser = await GetBrowser();38 var page = await browser.NewPageAsync();39 await page.GoToAsync(uri);40 await page.WaitForExpressionAsync("arma3TacMapLoaded", new WaitForFunctionOptions() { PollingInterval = 500, Timeout = 7500 });41 var bytes = await page.ScreenshotDataAsync();42 await page.CloseAsync();43 return bytes;44 }45 private async Task<Browser> GetBrowser()46 {47 if (browserTask == null)48 {49 await semaphoreSlim.WaitAsync();50 try51 {52 if (browserTask == null)53 {54 browserTask = GetBrowserTask();...

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test vueJS.csx

Source:test vueJS.csx Github

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...55 ()=> {56 window.programDone = false;57 }58 ");59 await page.WaitForExpressionAsync("window.programDone === true", new WaitForFunctionOptions{60 Timeout = 0 // disable timeout61 });62 Console.WriteLine("Program finished triggered");63 // program is done so close everything out64 await page.CloseAsync();65 await browser.CloseAsync();66}67await waitForProgramEnd();...

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PuppeteerExtensions.cs

Source:PuppeteerExtensions.cs Github

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...22 public static async Task ClickAsync(this Frame frame, string selector)23 {24 await (await frame.QuerySelectorAsync(selector)).ClickAsync();25 }26 public static async Task WaitForTruth(this Page page, string script, WaitForFunctionOptions opts = null)27 {28 var jsHandle = await page.WaitForExpressionAsync(script, opts);29 await jsHandle.DisposeAsync();30 }31 public static async Task WaitForDocumentInteractiveState(this Page page, int? timeout = null)32 {33 await page.WaitForTruth("document.readyState === 'interactive' || document.readyState === 'complete'", new WaitForFunctionOptions { Timeout = timeout ?? page.Browser.DefaultWaitForTimeout });34 }35 }36}...

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WaitForFunctionOptions.cs

Source:WaitForFunctionOptions.cs Github

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2{3 /// <summary>4 /// Optional waiting parameters.5 /// </summary>6 /// <seealso cref="Page.WaitForFunctionAsync(string, WaitForFunctionOptions, object[])"/>7 /// <seealso cref="Frame.WaitForFunctionAsync(string, WaitForFunctionOptions, object[])"/>8 public class WaitForFunctionOptions9 {10 /// <summary>11 /// Maximum time to wait for in milliseconds. Defaults to 30000 (30 seconds).12 /// </summary>13 public int Timeout { get; set; } = 30_000;14 /// <summary>15 /// An interval at which the <c>pageFunction</c> is executed. defaults to <see cref="WaitForFunctionPollingOption.Raf"/>16 /// </summary>17 public WaitForFunctionPollingOption Polling { get; set; } = WaitForFunctionPollingOption.Raf;18 /// <summary>19 /// An interval at which the <c>pageFunction</c> is executed. If no value is specified will use <see cref="Polling"/>20 /// </summary>21 public int? PollingInterval { get; set; }22 }...

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WaitForFunctionOptions

Using AI Code Generation

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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 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true }))10 using (var page = await browser.NewPageAsync())11 {12 await page.WaitForFunctionAsync("() => document.readyState === 'complete'", new WaitForFunctionOptions { Timeout = 0 });13 Console.WriteLine("Page loaded");14 }15 }16 }17}

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WaitForFunctionOptions

Using AI Code Generation

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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 using (var page = await browser.NewPageAsync())12 {13 {14 };15 await page.WaitForFunctionAsync("document.querySelector('input').value.length > 0", waitForFunctionOptions);16 Console.WriteLine("Input field is filled");17 }18 }19 }20}21How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 2)22How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 3)23How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 4)24How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 5)25How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 6)26How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 7)27How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 8)28How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 9)29How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 10)30How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 11)31How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 12)32How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 13)33How to use Puppeteer to take a screenshot of a page in PuppeteerSharp? (Part - 14)

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WaitForFunctionOptions

Using AI Code Generation

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;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.WaitForFunctionAsync("document.querySelector('#hplogo').complete");13 await page.ScreenshotAsync("google.png");14 await browser.CloseAsync();15 }16 }17}18document.querySelector('#hplogo').complete == true19document.querySelector('#hplogo').complete === true

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WaitForFunctionOptions

Using AI Code Generation

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;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.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0");13 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100 });14 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 5000 });15 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 5000, Timeout = 5000 });16 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 5000, Timeout = 5000, Timeout = 5000 });17 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 5000, Timeout = 5000, Timeout = 5000, Timeout = 5000 });18 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 5000, Timeout = 5000, Timeout = 5000, Timeout = 5000, Timeout = 5000 });19 await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 0", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 5000, Timeout = 5000, Timeout = 5000, Timeout =

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WaitForFunctionOptions

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main()7 {8 var browser = await Puppeteer.LaunchAsync(new LaunchOptions9 {10 Args = new string[] { "--no-sandbox" }11 });12 var page = await browser.NewPageAsync();13 var element = await page.WaitForSelectorAsync("input[name=q]", new WaitForSelectorOptions { Timeout = 30000 });14 await element.ClickAsync();15 await element.TypeAsync("PuppeteerSharp");16 await element.PressAsync("Enter");17 var element2 = await page.WaitForSelectorAsync("h3.LC20lb", new WaitForSelectorOptions { Timeout = 30000 });18 Console.WriteLine(await element2.EvaluateFunctionAsync<string>("element => element.textContent"));19 await browser.CloseAsync();20 }21 }22}23using System;24using System.Threading.Tasks;25using PuppeteerSharp;26{

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