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How to use LaunchAsync method of Microsoft.Playwright.Core.BrowserType class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Core.BrowserType.LaunchAsync

DownloadTests.cs

Source:DownloadTests.cs

...362        }363        [PlaywrightTest("download.spec.ts", "should delete downloads on browser gone")]364        public async Task ShouldDeleteDownloadsOnBrowserGone()365        {366            var browser = await BrowserType.LaunchAsync();367            var page = await browser.NewPageAsync(new() { AcceptDownloads = true });368            await page.SetContentAsync($"<a href=\"{Server.Prefix}/download\">download</a>");369            var download1Task = page.WaitForDownloadAsync();370            await TaskUtils.WhenAll(371                download1Task,372                page.ClickAsync("a"));373            var download2Task = page.WaitForDownloadAsync();374            await TaskUtils.WhenAll(375                download2Task,376                page.ClickAsync("a"));377            string path1 = await download1Task.Result.PathAsync();378            string path2 = await download2Task.Result.PathAsync();379            Assert.True(new FileInfo(path1).Exists);380            Assert.True(new FileInfo(path2).Exists);381            await browser.CloseAsync();382            Assert.False(new FileInfo(path1).Exists);383            Assert.False(new FileInfo(path2).Exists);384            Assert.False(new FileInfo(Path.Combine(path1, "..")).Exists);385        }386        [PlaywrightTest("download.spec.ts", "should be able to cancel pending downloads")]387        public async Task ShouldBeAbleToCancelPendingDownload()388        {389            var browser = await BrowserType.LaunchAsync();390            var page = await browser.NewPageAsync(new() { AcceptDownloads = true });391            await page.SetContentAsync($"<a href=\"{Server.Prefix}/downloadWithDelay\">download</a>");392            var download = await page.RunAndWaitForDownloadAsync(() => page.ClickAsync("a"));393            await download.CancelAsync();394            var failure = await download.FailureAsync();395            Assert.AreEqual("canceled", failure);396            await page.CloseAsync();397        }398        [PlaywrightTest("download.spec.ts", "should not fail explicitly to cancel a download even if that is already finished")]399        public async Task ShouldNotFailWhenCancellingACompletedDownload()400        {401            var browser = await BrowserType.LaunchAsync();402            var page = await browser.NewPageAsync(new() { AcceptDownloads = true });403            await page.SetContentAsync($"<a href=\"{Server.Prefix}/download\">download</a>");404            var download = await page.RunAndWaitForDownloadAsync(() => page.ClickAsync("a"));405            using var tmpDir = new TempDirectory();406            string userPath = Path.Combine(tmpDir.Path, "download.txt");407            await download.SaveAsAsync(userPath);408            Assert.IsTrue(File.Exists(userPath));409            await download.CancelAsync();410            var failure = await download.FailureAsync();411            Assert.IsNull(failure);412            await page.CloseAsync();413        }414        [PlaywrightTest("download.spec.ts", "should report downloads with interception")]415        public async Task ShouldReportDownloadsWithInterception()416        {417            var browser = await BrowserType.LaunchAsync();418            var page = await browser.NewPageAsync(new() { AcceptDownloads = true });419            await page.RouteAsync("*", r => r.ContinueAsync());420            await page.SetContentAsync($"<a href=\"{Server.Prefix}/download\">download</a>");421            var download = await page.RunAndWaitForDownloadAsync(() => page.ClickAsync("a"));422            var path = await download.PathAsync();423            Assert.IsTrue(File.Exists(path));424            await page.CloseAsync();425        }426    }427}...

BrowserContextBasicTests.cs

Source:BrowserContextBasicTests.cs

...34    {35        [PlaywrightTest("browsercontext-basic.spec.ts", "should create new context")]36        public async Task ShouldCreateNewContext()37        {38            await using var browser = await BrowserType.LaunchAsync();39            Assert.IsEmpty(browser.Contexts);40            await using var context = await browser.NewContextAsync();41            Assert.That(browser.Contexts, Has.Length.EqualTo(1));42            CollectionAssert.Contains(browser.Contexts, context);43            Assert.AreEqual(browser, context.Browser);44            await context.CloseAsync();45            Assert.IsEmpty(browser.Contexts);46            Assert.AreEqual(browser, context.Browser);47        }48        [PlaywrightTest("browsercontext-basic.spec.ts", "window.open should use parent tab context")]49        public async Task WindowOpenShouldUseParentTabContext()50        {51            await using var context = await Browser.NewContextAsync();52            var page = await context.NewPageAsync();53            await page.GotoAsync(Server.EmptyPage);54            var popupTargetCompletion = new TaskCompletionSource<IPage>();55            page.Popup += (_, e) => popupTargetCompletion.SetResult(e);56            var (popupTarget, _) = await TaskUtils.WhenAll(57                popupTargetCompletion.Task,58                page.EvaluateAsync("url => window.open(url)", Server.EmptyPage)59            );60            Assert.AreEqual(context, popupTarget.Context);61            await context.CloseAsync();62        }63        [PlaywrightTest("browsercontext-basic.spec.ts", "should isolate localStorage and cookies")]64        public async Task ShouldIsolateLocalStorageAndCookies()65        {66            // Create two incognito contexts.67            await using var browser = await BrowserType.LaunchAsync();68            var context1 = await browser.NewContextAsync();69            var context2 = await browser.NewContextAsync();70            Assert.IsEmpty(context1.Pages);71            Assert.IsEmpty(context2.Pages);72            // Create a page in first incognito context.73            var page1 = await context1.NewPageAsync();74            await page1.GotoAsync(Server.EmptyPage);75            await page1.EvaluateAsync(@"() => {76                localStorage.setItem('name', 'page1');77                document.cookie = 'name=page1';78            }");79            Assert.That(context1.Pages, Has.Count.EqualTo(1));80            Assert.IsEmpty(context2.Pages);81            // Create a page in second incognito context....

BrowserType.cs

Source:BrowserType.cs

...45        IChannel<BrowserType> IChannelOwner<BrowserType>.Channel => _channel;46        internal PlaywrightImpl Playwright { get; set; }47        public string ExecutablePath => _initializer.ExecutablePath;48        public string Name => _initializer.Name;49        public async Task<IBrowser> LaunchAsync(BrowserTypeLaunchOptions options = default)50        {51            options ??= new BrowserTypeLaunchOptions();52            Browser browser = (await _channel.LaunchAsync(53                headless: options.Headless,54                channel: options.Channel,55                executablePath: options.ExecutablePath,56                passedArguments: options.Args,57                proxy: options.Proxy,58                downloadsPath: options.DownloadsPath,59                tracesDir: options.TracesDir,60                chromiumSandbox: options.ChromiumSandbox,61                firefoxUserPrefs: options.FirefoxUserPrefs,62                handleSIGINT: options.HandleSIGINT,63                handleSIGTERM: options.HandleSIGTERM,64                handleSIGHUP: options.HandleSIGHUP,65                timeout: options.Timeout,66                env: options.Env,...

BrowserTypeChannel.cs

Source:BrowserTypeChannel.cs

...32    {33        public BrowserTypeChannel(string guid, Connection connection, Core.BrowserType owner) : base(guid, connection, owner)34        {35        }36        public Task<BrowserChannel> LaunchAsync(37            bool? headless = default,38            string channel = default,39            string executablePath = default,40            IEnumerable<string> passedArguments = default,41            Proxy proxy = default,42            string downloadsPath = default,43            string tracesDir = default,44            bool? chromiumSandbox = default,45            IEnumerable<KeyValuePair<string, object>> firefoxUserPrefs = default,46            bool? handleSIGINT = default,47            bool? handleSIGTERM = default,48            bool? handleSIGHUP = default,49            float? timeout = default,50            IEnumerable<KeyValuePair<string, string>> env = default,...

PlaywrightBrowserManager.cs

Source:PlaywrightBrowserManager.cs

...40            cancellationToken.ThrowIfCancellationRequested();41            var playwright = await GetPlaywrightAsync(cancellationToken).ConfigureAwait(false);42            var browser = await browsersByInstanceId.GetOrAdd(43                instanceId,44                (instanceId) => new AsyncLazy<IBrowser>(async () => await (browserType ?? playwright.Chromium).LaunchAsync(browserTypeLaunchOptions).ConfigureAwait(false))45            )46                .WithCancellation(cancellationToken)47                .ConfigureAwait(false);48            using (await browser.AcquireLockAsync(cancellationToken).ConfigureAwait(false))49            {50                return await browser.NewContextAsync(browserNewContextOptions).ConfigureAwait(false);51            }52        }53        /// <summary>54        /// Closes the Playwright browser with the specified <paramref name="instanceId"/>, if it exists.55        /// </summary>56        /// <param name="instanceId">The instance ID of the browser to close</param>57        /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>58        /// <returns> <see langword="true"/> if the browser existed and was closed successfully; otherwise, <see langword="false"/></returns>...

ProxyTests.cs

Source:ProxyTests.cs

...35        public async Task ShouldUseProxy()36        {37            Server.SetRoute("/target.html", ctx => ctx.Response.WriteAsync("<html><title>Served by the proxy</title></html>"));38            var proxy = new Proxy { Server = $"localhost:{Server.Port}" };39            await using var browser = await BrowserType.LaunchAsync(new() { Proxy = proxy });40            var page = await browser.NewPageAsync();41            await page.GotoAsync("http://non-existent.com/target.html");42            Assert.AreEqual("Served by the proxy", await page.TitleAsync());43        }44        [PlaywrightTest("proxy.spec.ts", "should authenticate")]45        public async Task ShouldAuthenticate()46        {47            Server.SetRoute("/target.html", ctx =>48            {49                string auth = ctx.Request.Headers["proxy-authorization"];50                if (string.IsNullOrEmpty(auth))51                {52                    ctx.Response.StatusCode = 407;53                    ctx.Response.Headers["Proxy-Authenticate"] = "Basic realm=\"Access to internal site\"";54                }55                return ctx.Response.WriteAsync($"<html><title>{auth}</title></html>");56            });57            var proxy = new Proxy58            {59                Server = $"localhost:{Server.Port}",60                Username = "user",61                Password = "secret"62            };63            await using var browser = await BrowserType.LaunchAsync(new() { Proxy = proxy });64            var page = await browser.NewPageAsync();65            await page.GotoAsync("http://non-existent.com/target.html");66            Assert.AreEqual("Basic " + Convert.ToBase64String(Encoding.UTF8.GetBytes("user:secret")), await page.TitleAsync());67        }68        [PlaywrightTest("proxy.spec.ts", "should exclude patterns")]69        public async Task ShouldExcludePatterns()70        {71            Server.SetRoute("/target.html", ctx => ctx.Response.WriteAsync("<html><title>Served by the proxy</title></html>"));72            var proxy = new Proxy73            {74                Server = $"localhost:{Server.Port}",75                Bypass = "non-existent1.com, .non-existent2.com, .another.test",76            };77            await using var browser = await BrowserType.LaunchAsync(new() { Proxy = proxy });78            var page = await browser.NewPageAsync();79            await page.GotoAsync("http://non-existent.com/target.html");80            Assert.AreEqual("Served by the proxy", await page.TitleAsync());81            await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => page.GotoAsync("http://non-existent1.com/target.html"));82            await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => page.GotoAsync("http://sub.non-existent2.com/target.html"));83            await PlaywrightAssert.ThrowsAsync<PlaywrightException>(() => page.GotoAsync("http://foo.is.the.another.test/target.html"));84        }85    }86}...

PlaywrightDriverSetup.cs

Source:PlaywrightDriverSetup.cs

...22                IBrowser browser = null;23                switch (browserType)24                {25                    case BrowserType.Chromium:26                        browser = await playwright.Chromium.LaunchAsync(browserTypeLaunchOptions);27                        break;28                    case BrowserType.Firefox:29                        browser = await playwright.Firefox.LaunchAsync(browserTypeLaunchOptions);30                        break;31                    case BrowserType.Webkit:32                        browser = await playwright.Webkit.LaunchAsync(browserTypeLaunchOptions);33                        break;34                }35                IBrowserContext browserContext = await browser.NewContextAsync(new BrowserNewContextOptions36                {37                    IgnoreHTTPSErrors = true,38                    ViewportSize = ViewportSize.NoViewport39                });40                IPage page = await browserContext.NewPageAsync();41                _playwrightDriver = new PlaywrightDriver()42                {43                    Playwright = playwright,44                    Browser = browser,45                    BrowserContext = browserContext,46                    Page = page...

LaunchAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            var browserType = playwright.Chromium;10            {11            };12            var browser = await browserType.LaunchAsync(launchOptions);13            var context = await browser.NewContextAsync();14            var page = await context.NewPageAsync();15            await page.ScreenshotAsync("google.png");16            await browser.CloseAsync();17        }18    }19}20using System;21using System.Threading.Tasks;22using Microsoft.Playwright;23{24    {25        static async Task Main(string[] args)26        {27            using var playwright = await Playwright.CreateAsync();28            var browserType = playwright.Firefox;29            {30            };31            var browser = await browserType.LaunchAsync(launchOptions);32            var context = await browser.NewContextAsync();33            var page = await context.NewPageAsync();34            await page.ScreenshotAsync("google.png");35            await browser.CloseAsync();36        }37    }38}39using System;40using System.Threading.Tasks;41using Microsoft.Playwright;42{43    {44        static async Task Main(string[] args)45        {46            using var playwright = await Playwright.CreateAsync();47            var browserType = playwright.Webkit;48            {49            };50            var browser = await browserType.LaunchAsync(launchOptions);51            var context = await browser.NewContextAsync();52            var page = await context.NewPageAsync();53            await page.ScreenshotAsync("google.png");54            await browser.CloseAsync();55        }

LaunchAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var context = await browser.NewContextAsync();13            var page = await context.NewPageAsync();14        }15    }16}17using Microsoft.Playwright;18using System;19using System.Threading.Tasks;20{21    {22        static async Task Main(string[] args)23        {24            using var playwright = await Playwright.CreateAsync();25            await using var browser = await playwright.Firefox.LaunchAsync(new BrowserTypeLaunchOptions26            {27            });28            var context = await browser.NewContextAsync();29            var page = await context.NewPageAsync();30        }31    }32}33using Microsoft.Playwright;34using System;35using System.Threading.Tasks;36{37    {38        static async Task Main(string[] args)39        {40            using var playwright = await Playwright.CreateAsync();41            await using var browser = await playwright.Webkit.LaunchAsync(new BrowserTypeLaunchOptions42            {43            });44            var context = await browser.NewContextAsync();45            var page = await context.NewPageAsync();46        }47    }48}49using Microsoft.Playwright;50using System;51using System.Threading.Tasks;52{53    {54        static async Task Main(string[] args)55        {56            using var playwright = await Playwright.CreateAsync();57            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions58            {59            });

LaunchAsync

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Core;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9    {10        static async Task Main(string[] args)11        {12            using var playwright = await Playwright.CreateAsync();13            await using var browser = await playwright.Chromium.LaunchAsync(headless: false);14            var page = await browser.NewPageAsync();15            await page.ScreenshotAsync("google.png");16        }17    }18}19using Microsoft.Playwright;20using Microsoft.Playwright.Core;21using System;22using System.Collections.Generic;23using System.Linq;24using System.Text;25using System.Threading.Tasks;26{27    {28        static async Task Main(string[] args)29        {30            using var playwright = await Playwright.CreateAsync();31            await using var browser = await playwright.Firefox.LaunchAsync(headless: false);32            var page = await browser.NewPageAsync();33            await page.ScreenshotAsync("google.png");34        }35    }36}37using Microsoft.Playwright;38using Microsoft.Playwright.Core;39using System;40using System.Collections.Generic;41using System.Linq;42using System.Text;43using System.Threading.Tasks;44{45    {46        static async Task Main(string[] args)47        {48            using var playwright = await Playwright.CreateAsync();49            await using var browser = await playwright.Webkit.LaunchAsync(headless: false);50            var page = await browser.NewPageAsync();51            await page.ScreenshotAsync("google.png");52        }53    }54}55using Microsoft.Playwright;56using Microsoft.Playwright.Core;57using System;58using System.Collections.Generic;59using System.Linq;60using System.Text;61using System.Threading.Tasks;62{63    {64        static async Task Main(string[] args)65        {

LaunchAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            var chromium = playwright.Chromium;10            var browser = await chromium.LaunchAsync(headless: false);11            var page = await browser.NewPageAsync();12            await page.ScreenshotAsync(path: "screenshot.png");13            await browser.CloseAsync();14        }15    }16}17using Microsoft.Playwright;18using System;19using System.Threading.Tasks;20{21    {22        static async Task Main(string[] args)23        {24            using var playwright = await Playwright.CreateAsync();25            var chromium = playwright.Chromium;26            var browser = await chromium.LaunchAsync(headless: false);27            var page = await browser.NewPageAsync();28            await page.ScreenshotAsync(path: "screenshot.png");29            await browser.CloseAsync();30        }31    }32}33using Microsoft.Playwright;34using System;35using System.Threading.Tasks;36{37    {38        static async Task Main(string[] args)39        {40            using var playwright = await Playwright.CreateAsync();41            var chromium = playwright.Chromium;42            var browser = await chromium.LaunchAsync(headless: false);43            var page = await browser.NewPageAsync();44            await page.ScreenshotAsync(path: "screenshot.png");45            await browser.CloseAsync();46        }47    }48}49using Microsoft.Playwright;50using System;51using System.Threading.Tasks;52{53    {54        static async Task Main(string[] args)55        {56            using var playwright = await Playwright.CreateAsync();57            var chromium = playwright.Chromium;58            var browser = await chromium.LaunchAsync(headless: false);59            var page = await browser.NewPageAsync();

LaunchAsync

Using AI Code Generation

1using Microsoft.Playwright.Core;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            await using var playwright = await Playwright.CreateAsync();9            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "google.png" });14            await browser.CloseAsync();15        }16    }17}18using Microsoft.Playwright.Core;19using System;20using System.Threading.Tasks;21{22    {23        static async Task Main(string[] args)24        {25            await using var playwright = await Playwright.CreateAsync();26            var browser = await playwright.Firefox.LaunchAsync(new BrowserTypeLaunchOptions27            {28            });29            var page = await browser.NewPageAsync();30            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "google.png" });31            await browser.CloseAsync();32        }33    }34}35using Microsoft.Playwright.Core;36using System;37using System.Threading.Tasks;38{39    {40        static async Task Main(string[] args)41        {42            await using var playwright = await Playwright.CreateAsync();43            var browser = await playwright.Webkit.LaunchAsync(new BrowserTypeLaunchOptions44            {45            });46            var page = await browser.NewPageAsync();47            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "google.png" });48            await browser.CloseAsync();49        }50    }51}52using Microsoft.Playwright.Core;53using System;54using System.Threading.Tasks;55{

LaunchAsync

Using AI Code Generation

1using Microsoft.Playwright.Core;2{3    {4        static async Task Main(string[] args)5        {6            await using var playwright = await Playwright.CreateAsync();7            await using var browser = await playwright.Chromium.LaunchAsync(new LaunchOptions { Headless = false });8            var page = await browser.NewPageAsync();9            await page.ScreenshotAsync("bing.png");10        }11    }12}

LaunchAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            await browser.CloseAsync();14        }15    }16}17using System;18using System.Threading.Tasks;19using Microsoft.Playwright;20{21    {22        static async Task Main(string[] args)23        {24            using var playwright = await Playwright.CreateAsync();25            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions26            {27            });28            var page = await browser.NewPageAsync();29            await page.WaitForSelectorAsync("input[title='Search']");30            await page.FillAsync("input[title='Search']", "playwright");31            await page.ClickAsync("input[value='Google Search']");32            await page.WaitForSelectorAsync("div[class='g']");33            await browser.CloseAsync();34        }35    }36}37using System;38using System.Threading.Tasks;39using Microsoft.Playwright;40{41    {42        static async Task Main(string[] args)43        {44            using var playwright = await Playwright.CreateAsync();45            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions46            {47            });

Playwright tutorial

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Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
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