Class LaunchOptions

Namespace

PuppeteerSharp

Assembly

PuppeteerSharp.dll

Options for launching the Chrome/ium browser.

public class LaunchOptions : IBrowserOptions, IConnectionOptions

Inheritance

object

LaunchOptions

Implements

IBrowserOptions

IConnectionOptions

Properties

AcceptInsecureCerts

Whether to ignore HTTPS errors during navigation. Defaults to false.

public bool AcceptInsecureCerts { get; set; }

Property Value

bool

Args

Additional arguments to pass to the browser instance. List of Chromium flags can be found here.

public string[] Args { get; set; }

Property Value

string[]

Browser

The browser to be used (Chrome, Chromium, Firefox).

public SupportedBrowser Browser { get; set; }

Property Value

SupportedBrowser

Channel

Chrome Release Channel.

public ChromeReleaseChannel? Channel { get; set; }

Property Value

ChromeReleaseChannel?

DefaultViewport

Gets or sets the default Viewport.

public ViewPortOptions DefaultViewport { get; set; }

Property Value

ViewPortOptions

The default Viewport.

Devtools

Whether to auto-open DevTools panel for each tab. If this option is true, the headless option will be set false.

public bool Devtools { get; set; }

Property Value

bool

DumpIO

Whether to pipe browser process stdout and stderr into process.stdout and process.stderr. Defaults to false.

public bool DumpIO { get; set; }

Property Value

bool

EnqueueAsyncMessages

Affects how responses to SendAsync(string, object, bool, CommandOptions) are returned to the caller. If true (default), the response is delivered to the caller on its own thread; otherwise, the response is delivered the same way MessageReceived events are raised.

public bool EnqueueAsyncMessages { get; set; }

Property Value

bool

Remarks

This should normally be set to true to support applications that aren't async "all the way up"; i.e., the application has legacy code that is not async which makes calls into PuppeteerSharp. If you experience issues, or your application is not mixed sync/async use, you can set this to false (default).

EnqueueTransportMessages

If not PuppeteerSharp.Transport is set this will be use to determine is the default WebSocketTransport will enqueue messages.

public bool EnqueueTransportMessages { get; set; }

Property Value

bool

Remarks

It's set to true by default because it's the safest way to send commands to Chromium. Setting this to false proved to work in .NET Core but it tends to fail on .NET Framework.

Env

Specify environment variables that will be visible to browser. Defaults to Environment variables.

public IDictionary<string, string> Env { get; }

Property Value

IDictionary<string, string>

ExecutablePath

Path to a Chromium or Chrome executable to run instead of bundled Chromium. If executablePath is a relative path, then it is resolved relative to current working directory.

public string ExecutablePath { get; set; }

Property Value

string

ExtraPrefsFirefox

Additional preferences that can be passed when launching with Firefox. See.

public Dictionary<string, object> ExtraPrefsFirefox { get; set; }

Property Value

Dictionary<string, object>

Headless

Whether to run browser in headless mode. Defaults to true unless the devtools option is true. If you need to run using the old headless mode, set HeadlessMode this to Shell.

public bool Headless { get; set; }

Property Value

bool

HeadlessMode

Whether to run browser in headless mode. Defaults to true unless the devtools option is true.

public HeadlessMode HeadlessMode { get; set; }

Property Value

HeadlessMode

IgnoreDefaultArgs

If true, then do not use GetDefaultArgs(LaunchOptions). Dangerous option; use with care. Defaults to false.

public bool IgnoreDefaultArgs { get; set; }

Property Value

bool

IgnoredDefaultArgs

if IgnoreDefaultArgs is set to false this list will be used to filter GetDefaultArgs(LaunchOptions).

public string[] IgnoredDefaultArgs { get; set; }

Property Value

string[]

LogProcess

Logs process counts after launching chrome and after exiting.

public bool LogProcess { get; set; }

Property Value

bool

ProtocolTimeout

Timeout setting for individual protocol (CDP) calls. Defaults to 180_000.

public int ProtocolTimeout { get; set; }

Property Value

int

SlowMo

Slows down Puppeteer operations by the specified amount of milliseconds. Useful so that you can see what is going on.

public int SlowMo { get; set; }

Property Value

int

TargetFilter

Callback to decide if Puppeteer should connect to a given target or not.

public Func<Target, bool> TargetFilter { get; set; }

Property Value

Func<Target, bool>

Timeout

Maximum time in milliseconds to wait for the browser instance to start. Defaults to 30000 (30 seconds). Pass 0 to disable timeout.

public int Timeout { get; set; }

Property Value

int

TransportFactory

Optional factory for IConnectionTransport implementations.

public TransportFactory TransportFactory { get; set; }

Property Value

TransportFactory

UserDataDir

Path to a User Data Directory.

public string UserDataDir { get; set; }

Property Value

string

WebSocketFactory

Optional factory for WebSocket implementations. If PuppeteerSharp.Transport is set this property will be ignored.

public WebSocketFactory WebSocketFactory { get; set; }

Property Value

WebSocketFactory

Remarks

If you need to run Puppeteer-Sharp on Windows 7, you can use WebSocketFactory to inject System.Net.WebSockets.Client.Managed.

WebSocketFactory = async (uri, socketOptions, cancellationToken) => { var client = SystemClientWebSocket.CreateClientWebSocket(); if (client is System.Net.WebSockets.Managed.ClientWebSocket managed) { managed.Options.KeepAliveInterval = TimeSpan.FromSeconds(0); await managed.ConnectAsync(uri, cancellationToken); } else { var coreSocket = client as ClientWebSocket; coreSocket.Options.KeepAliveInterval = TimeSpan.FromSeconds(0); await coreSocket.ConnectAsync(uri, cancellationToken); }

return client;

},