How to use WaitForFunctionOptions class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.WaitForFunctionOptions

Examples.cs

Source:Examples.cs

...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()...

WaitForFunctionTests.cs

Source:WaitForFunctionTests.cs

...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()...

PuppeteerBannerGenerator.cs

Source:PuppeteerBannerGenerator.cs

...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        }...

test vueJS - Example1 - Refresh Top System Processes.csx

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

...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();...

ScreenshotService.cs

Source:ScreenshotService.cs

...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();...

test vueJS.csx

Source:test vueJS.csx

...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();...

PuppeteerExtensions.cs

Source:PuppeteerExtensions.cs

...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}...

WaitForFunctionOptions.cs

Source:WaitForFunctionOptions.cs

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    }...

WaitForFunctionOptions

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            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}

WaitForFunctionOptions

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            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)

WaitForFunctionOptions

Using AI Code Generation

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

WaitForFunctionOptions

Using AI Code Generation

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 =

WaitForFunctionOptions

Using AI Code Generation

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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