How to use WaitForFunctionAsync method of PuppeteerSharp.Frame class

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

Frame.cs

Source:Frame.cs

...304        /// <param name="script">Function to be evaluated in browser context</param>305        /// <param name="options">Optional waiting parameters</param>306        /// <param name="args">Arguments to pass to <c>script</c></param>307        /// <returns>A task that resolves when the <c>script</c> returns a truthy value</returns>308        /// <seealso cref="Page.WaitForFunctionAsync(string, WaitForFunctionOptions, object[])"/>309        /// <exception cref="WaitTaskTimeoutException">If timeout occurred.</exception>310        public Task<JSHandle> WaitForFunctionAsync(string script, WaitForFunctionOptions options, params object[] args)311           => MainWorld.WaitForFunctionAsync(script, options, args);312        /// <summary>313        /// Waits for an expression to be evaluated to a truthy value314        /// </summary>315        /// <param name="script">Expression to be evaluated in browser context</param>316        /// <param name="options">Optional waiting parameters</param>317        /// <returns>A task that resolves when the <c>script</c> returns a truthy value</returns>318        /// <seealso cref="Page.WaitForExpressionAsync(string, WaitForFunctionOptions)"/>319        /// <exception cref="WaitTaskTimeoutException">If timeout occurred.</exception>320        public Task<JSHandle> WaitForExpressionAsync(string script, WaitForFunctionOptions options)321            => MainWorld.WaitForExpressionAsync(script, options);322        /// <summary>323        /// Adds a <c><![CDATA[<link rel="stylesheet">]]></c> tag into the page with the desired url or a <c><![CDATA[<link rel="stylesheet">]]></c> tag with the content324        /// </summary>325        /// <param name="options">add style tag options</param>...

DOMWorld.cs

Source:DOMWorld.cs

...226        internal Task<ElementHandle> WaitForSelectorAsync(string selector, WaitForSelectorOptions options = null)227            => WaitForSelectorOrXPathAsync(selector, false, options);228        internal Task<ElementHandle> WaitForXPathAsync(string xpath, WaitForSelectorOptions options = null)229            => WaitForSelectorOrXPathAsync(xpath, true, options);230        internal Task<JSHandle> WaitForFunctionAsync(string script, WaitForFunctionOptions options, params object[] args)231            => new WaitTask(232                this,233                script,234                false,235                "function",236                options.Polling,237                options.PollingInterval,238                options.Timeout ?? _timeoutSettings.Timeout,239                args).Task;240        internal Task<JSHandle> WaitForExpressionAsync(string script, WaitForFunctionOptions options)241            => new WaitTask(242                this,243                script,244                true,...

InputTests.cs

Source:InputTests.cs

...173                PollingInterval = 50,174                Timeout = 1000175            };176            Task WaitForScrollPointAsync(DomPointInternal point)177                => Page.WaitForFunctionAsync(178                    @"(x, y) => document.body.scrollLeft === x && document.body.scrollTop === y",179                    waitForFunctionOptions,180                    point.X,181                    point.Y);182            await Page.GoToAsync(183                $@"{TestConstants.ServerUrl}/longText.html",184                WaitUntilNavigation.Networkidle0);185            var expectedWheelEvents = new[]186            {187                new WheelEventInternal(0, 500),188                new WheelEventInternal(0, -200),189                new WheelEventInternal(300, 0),190                new WheelEventInternal(-150, 0)191            };...

FrameWaitForFunctionTests.cs

Source:FrameWaitForFunctionTests.cs

...16        [PuppeteerFact]17        public async Task ShouldWorkWhenResolvedRightBeforeExecutionContextDisposal()18        {19            await Page.EvaluateFunctionOnNewDocumentAsync("() => window.__RELOADED = true");20            await Page.WaitForFunctionAsync(@"() =>21            {22                if (!window.__RELOADED)23                    window.location.reload();24                return true;25            }");26        }27        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on interval")]28        [PuppeteerFact]29        public async Task ShouldPollOnInterval()30        {31            var success = false;32            var startTime = DateTime.Now;33            var polling = 100;34            var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'", new WaitForFunctionOptions { PollingInterval = polling })35                .ContinueWith(_ => success = true);36            await Page.EvaluateExpressionAsync("window.__FOO = 'hit'");37            Assert.False(success);38            await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");39            await watchdog;40            Assert.True((DateTime.Now - startTime).TotalMilliseconds > polling / 2);41        }42        43        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on interval async")]44        [PuppeteerFact]45        public async Task ShouldPollOnIntervalAsync()46        {47            var success = false;48            var startTime = DateTime.Now;49            var polling = 100;50            var watchdog = Page.WaitForFunctionAsync("async () => window.__FOO === 'hit'", new WaitForFunctionOptions { PollingInterval = polling })51                .ContinueWith(_ => success = true);52            await Page.EvaluateFunctionAsync("async () => window.__FOO = 'hit'");53            Assert.False(success);54            await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");55            await watchdog;56            Assert.True((DateTime.Now - startTime).TotalMilliseconds > polling / 2);57        }58        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on mutation")]59        [PuppeteerFact]60        public async Task ShouldPollOnMutation()61        {62            var success = false;63            var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'",64                new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Mutation })65                .ContinueWith(_ => success = true);66            await Page.EvaluateExpressionAsync("window.__FOO = 'hit'");67            Assert.False(success);68            await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");69            await watchdog;70        }71        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on mutation async")]72        [PuppeteerFact]73        public async Task ShouldPollOnMutationAsync()74        {75            var success = false;76            var watchdog = Page.WaitForFunctionAsync("async () => window.__FOO === 'hit'",77                new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Mutation })78                .ContinueWith(_ => success = true);79            await Page.EvaluateFunctionAsync("async () => window.__FOO = 'hit'");80            Assert.False(success);81            await Page.EvaluateExpressionAsync("document.body.appendChild(document.createElement('div'))");82            await watchdog;83        }84        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on raf")]85        [PuppeteerFact]86        public async Task ShouldPollOnRaf()87        {88            var watchdog = Page.WaitForFunctionAsync("() => window.__FOO === 'hit'",89                new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Raf });90            await Page.EvaluateExpressionAsync("window.__FOO = 'hit'");91            await watchdog;92        }93        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should poll on raf async")]94        [PuppeteerFact]95        public async Task ShouldPollOnRafAsync()96        {97            var watchdog = Page.WaitForFunctionAsync("async () => window.__FOO === 'hit'",98                new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Raf });99            await Page.EvaluateFunctionAsync("async () => (globalThis.__FOO = 'hit')");100            await watchdog;101        }102        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should work with strict CSP policy")]103        [SkipBrowserFact(skipFirefox: true)]104        public async Task ShouldWorkWithStrictCSPPolicy()105        {106            Server.SetCSP("/empty.html", "script-src " + TestConstants.ServerUrl);107            await Page.GoToAsync(TestConstants.EmptyPage);108            await Task.WhenAll(109                Page.WaitForFunctionAsync("() => window.__FOO === 'hit'", new WaitForFunctionOptions110                {111                    Polling = WaitForFunctionPollingOption.Raf112                }),113                Page.EvaluateExpressionAsync("window.__FOO = 'hit'"));114        }115        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should throw negative polling interval")]116        [PuppeteerFact]117        public async Task ShouldThrowNegativePollingInterval()118        {119            var exception = await Assert.ThrowsAsync<ArgumentOutOfRangeException>(()120                => Page.WaitForFunctionAsync("() => !!document.body", new WaitForFunctionOptions { PollingInterval = -10 }));121            Assert.Contains("Cannot poll with non-positive interval", exception.Message);122        }123        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should return the success value as a JSHandle")]124        [PuppeteerFact]125        public async Task ShouldReturnTheSuccessValueAsAJSHandle()126            => Assert.Equal(5, await (await Page.WaitForFunctionAsync("() => 5")).JsonValueAsync<int>());127        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should return the window as a success value")]128        [PuppeteerFact]129        public async Task ShouldReturnTheWindowAsASuccessValue()130            => Assert.NotNull(await Page.WaitForFunctionAsync("() => window"));131        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should accept ElementHandle arguments")]132        [PuppeteerFact]133        public async Task ShouldAcceptElementHandleArguments()134        {135            await Page.SetContentAsync("<div></div>");136            var div = await Page.QuerySelectorAsync("div");137            var resolved = false;138            var waitForFunction = Page.WaitForFunctionAsync("element => !element.parentElement", div)139                .ContinueWith(_ => resolved = true);140            Assert.False(resolved);141            await Page.EvaluateFunctionAsync("element => element.remove()", div);142            await waitForFunction;143        }144        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should respect timeout")]145        [PuppeteerFact]146        public async Task ShouldRespectTimeout()147        {148            var exception = await Assert.ThrowsAsync<WaitTaskTimeoutException>(()149                => Page.WaitForExpressionAsync("false", new WaitForFunctionOptions { Timeout = 10 }));150            Assert.Contains("waiting for function failed: timeout", exception.Message);151        }152        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should respect default timeout")]153        [PuppeteerFact]154        public async Task ShouldRespectDefaultTimeout()155        {156            Page.DefaultTimeout = 1;157            var exception = await Assert.ThrowsAsync<WaitTaskTimeoutException>(()158                => Page.WaitForExpressionAsync("false"));159            Assert.Contains("waiting for function failed: timeout", exception.Message);160        }161        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should disable timeout when its set to 0")]162        [PuppeteerFact]163        public async Task ShouldDisableTimeoutWhenItsSetTo0()164        {165            var watchdog = Page.WaitForFunctionAsync(@"() => {166                window.__counter = (window.__counter || 0) + 1;167                return window.__injected;168            }", new WaitForFunctionOptions { Timeout = 0, PollingInterval = 10 });169            await Page.WaitForFunctionAsync("() => window.__counter > 10");170            await Page.EvaluateExpressionAsync("window.__injected = true");171            await watchdog;172        }173        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should survive cross-process navigation")]174        [PuppeteerFact]175        public async Task ShouldSurviveCrossProcessNavigation()176        {177            var fooFound = false;178            var waitForFunction = Page.WaitForExpressionAsync("window.__FOO === 1")179                .ContinueWith(_ => fooFound = true);180            await Page.GoToAsync(TestConstants.EmptyPage);181            Assert.False(fooFound);182            await Page.ReloadAsync();183            Assert.False(fooFound);184            await Page.GoToAsync(TestConstants.CrossProcessUrl + "/grid.html");185            Assert.False(fooFound);186            await Page.EvaluateExpressionAsync("window.__FOO = 1");187            await waitForFunction;188            Assert.True(fooFound);189        }190        [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should survive navigations")]191        [PuppeteerFact]192        public async Task ShouldSurviveNavigations()193        {194            var watchdog = Page.WaitForFunctionAsync("() => window.__done");195            await Page.GoToAsync(TestConstants.EmptyPage);196            await Page.GoToAsync(TestConstants.ServerUrl + "/consolelog.html");197            await Page.EvaluateFunctionAsync("() => window.__done = true");198            await watchdog;199        }200    }201}...

BlazorTest.cs

Source:BlazorTest.cs

...175      await page.ClickAsync("h1 > strong > a");176      await page.WaitForNavigationAsync(new NavigationOptions { Timeout = timeout });177178      await page.WaitForExpressionAsync("1 + 1 === 2", new WaitForFunctionOptions { Timeout = timeout });179      await page.WaitForFunctionAsync("() => window.location.href === 'https://github.com/kblok/puppeteer-sharp'", new WaitForFunctionOptions { Timeout = timeout });180      await page.WaitForSelectorAsync("#readme", new WaitForSelectorOptions { Timeout = timeout });181      await page.WaitForXPathAsync("//*[@id='readme']", new WaitForSelectorOptions { Timeout = timeout });182183      await page.WaitForTimeoutAsync(timeout);184185      // WaitUntilNavigation186      new NavigationOptions().WaitUntil = new []187      {188        WaitUntilNavigation.Load,189        WaitUntilNavigation.DOMContentLoaded,190        WaitUntilNavigation.Networkidle0,191        WaitUntilNavigation.Networkidle2192      };193194      // Frame195      var frame = page.MainFrame;196197      await frame.WaitForExpressionAsync("1 + 1 === 2", new WaitForFunctionOptions { Timeout = timeout });198      await frame.WaitForFunctionAsync("() => window.location.href === 'https://github.com/kblok/puppeteer-sharp'", new WaitForFunctionOptions { Timeout = timeout });199      await frame.WaitForSelectorAsync("#readme", new WaitForSelectorOptions { Timeout = timeout });200      await frame.WaitForXPathAsync("//*[@id='readme']", new WaitForSelectorOptions { Timeout = timeout });201202      await frame.WaitForTimeoutAsync(timeout);203    }204205    [Fact]206    public async Task values_from_Page()207    {208      var page = await Page();209210      var url = page.Url;211      var title = await page.GetTitleAsync();212      var content = await page.GetContentAsync();
...

Examples.cs

Source:Examples.cs

...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()66        {67            await Page.SetContentAsync("<div></div>");68            var div = await Page.QuerySelectorAsync("div");69            var resolved = false;70            var waitForFunction = Page.WaitForFunctionAsync("element => !element.parentElement", div)71                .ContinueWith(_ => resolved = true);72            Assert.False(resolved);73            await Page.EvaluateFunctionAsync("element => element.remove()", div);74            await waitForFunction;75        }76    }77}...

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    /// <seealso cref="WaitForSelectorOptions"/>9    public class WaitForFunctionOptions10    {11        /// <summary>12        /// Maximum time to wait for in milliseconds. Defaults to 30000 (30 seconds). Pass 0 to disable timeout.13        /// </summary>14        public int Timeout { get; set; } = 30_000;15        /// <summary>16        /// An interval at which the <c>pageFunction</c> is executed. defaults to <see cref="WaitForFunctionPollingOption.Raf"/>17        /// </summary>18        public WaitForFunctionPollingOption Polling { get; set; } = WaitForFunctionPollingOption.Raf;19        /// <summary>20        /// An interval at which the <c>pageFunction</c> is executed. If no value is specified will use <see cref="Polling"/>21        /// </summary>...

WaitForFunctionAsync

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[] { "--start-maximized" }11            });12            var page = await browser.NewPageAsync();13            await page.WaitForFunctionAsync("document.body.innerText.includes('Google')");14            await page.ScreenshotAsync("screenshot.png");15            await browser.CloseAsync();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                Args = new string[] { "--start-maximized" }29            });30            var page = await browser.NewPageAsync();31            await page.WaitForFunctionAsync("document.body.innerText.includes('Google')");32            await page.ScreenshotAsync("screenshot.png");33            await browser.CloseAsync();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                Args = new string[] { "--start-maximized" }47            });48            var page = await browser.NewPageAsync();49            await page.WaitForFunctionAsync("document.body.innerText.includes('Google')");50            await page.ScreenshotAsync("screenshot.png");51            await browser.CloseAsync();52        }53    }54}55using System;56using System.Threading.Tasks;

WaitForFunctionAsync

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 = true };9            using (var browser = await Puppeteer.LaunchAsync(options))10            {11                using (var page = await browser.NewPageAsync())12                {13                    var elementHandle = await page.WaitForFunctionAsync(@"() => {14                        var element = document.querySelector('input[name=q]');15                        return element != null;16                    }");17                }18            }19        }20    }21}22var elementHandle = await page.WaitForFunctionAsync(@"() => {23    var element = document.querySelector('input[name=q]');24    return element != null;25}");26var elementHandle = await page.WaitForFunctionAsync(async () => {27    var element = await page.QuerySelectorAsync("input[name=q]");28    return element != null;29});30var elementHandle = await page.WaitForFunctionAsync(@"(selector) => {31    var element = document.querySelector(selector);32    return element != null;33}", "input[name=q]");34var elementHandle = await page.WaitForFunctionAsync(@"(selector) => {35    var element = document.querySelector(selector);36    return element != null;37}", new WaitForFunctionOptions {38}, "input[name=q]");

WaitForFunctionAsync

Using AI Code Generation

1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3});4var page = await browser.NewPageAsync();5await page.WaitForFunctionAsync("document.querySelector('input[name=q]')");6await browser.CloseAsync();7var browser = await Puppeteer.LaunchAsync(new LaunchOptions8{9});10var page = await browser.NewPageAsync();11await page.WaitForFunctionAsync("() => document.querySelector('input[name=q]')");12await browser.CloseAsync();13var browser = await Puppeteer.LaunchAsync(new LaunchOptions14{15});16var page = await browser.NewPageAsync();17await page.WaitForFunctionAsync("() => document.querySelector('input[name=q]') != null");18await browser.CloseAsync();19var browser = await Puppeteer.LaunchAsync(new LaunchOptions20{21});22var page = await browser.NewPageAsync();23await page.WaitForFunctionAsync("() => document.querySelector('input[name=q]') != undefined");24await browser.CloseAsync();25var browser = await Puppeteer.LaunchAsync(new LaunchOptions26{27});28var page = await browser.NewPageAsync();29await page.WaitForFunctionAsync("() => document.querySelector('input[name=q]') != 0");30await browser.CloseAsync();

WaitForFunctionAsync

Using AI Code Generation

1var frame = await page.GetMainFrameAsync();2var url = await frame.WaitForFunctionAsync("() => document.location.href");3Console.WriteLine(url);4var url = await page.WaitForFunctionAsync("() => document.location.href");5Console.WriteLine(url);6var frame = await page.GetMainFrameAsync();7var url = await frame.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100 });8Console.WriteLine(url);9var url = await page.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100 });10Console.WriteLine(url);11var frame = await page.GetMainFrameAsync();12var url = await frame.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 30000 });13Console.WriteLine(url);14var url = await page.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 30000 });15Console.WriteLine(url);16var frame = await page.GetMainFrameAsync();17var url = await frame.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 30000 });18Console.WriteLine(url);19var url = await page.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100, Timeout = 30000 });20Console.WriteLine(url);21var frame = await page.GetMainFrameAsync();22var url = await frame.WaitForFunctionAsync("() => document.location.href", new WaitForFunctionOptions { PollingInterval = 100, Timeout =

WaitForFunctionAsync

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        public static async Task Run()7        {8            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))10            using (var page = await browser.NewPageAsync())11            {12                await page.WaitForFunctionAsync("document.querySelector('input[name=q]').value.length > 2");13                await page.ScreenshotAsync("1.png");14            }15        }16    }17}18using PuppeteerSharp;19using System;20using System.Threading.Tasks;21{22    {23        public static async Task Run()24        {25            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);26            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))27            using (var page = await browser.NewPageAsync())28            {29                await page.WaitForSelectorAsync("input[name=q]");30                await page.ScreenshotAsync("2.png");31            }32        }33    }34}35using PuppeteerSharp;36using System;37using System.Threading.Tasks;38{39    {40        public static async Task Run()41        {42            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);43            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))44            using (var page = await browser.NewPageAsync())45            {46                await page.ScreenshotAsync("3.png");47            }48        }49    }50}

WaitForFunctionAsync

Using AI Code Generation

1var frame = await page.GetMainFrameAsync();2var function = @"() => {3    return document.querySelector('h1').textContent;4}";5var waitFunction = await frame.WaitForFunctionAsync(function, 5000);6var result = await waitFunction.JsonValueAsync();7Console.WriteLine(result.ToString());8var function = @"() => {9    return document.querySelector('h1').textContent;10}";11var waitFunction = await page.WaitForFunctionAsync(function, 5000);12var result = await waitFunction.JsonValueAsync();13Console.WriteLine(result.ToString());

Automation Testing Tutorials

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.