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WebBrowserExtensionsEvaluateScriptAsPromiseAsync Method (IWebBrowser, String, NullableTimeSpan)

Version 102.0.100
Evaluate Javascript in the context of the MainFrame of the ChromiumWebBrowser. The script will be executed asynchronously and the method returns a Task encapsulating the response from the Javascript. The result of the script execution in javascript is Promise.resolve so even no promise values will be treated as a promise. Your javascript should return a value. The javascript will be wrapped in an Immediately Invoked Function Expression. When the promise either trigger then/catch this returned Task will be completed.

Namespace:  CefSharp
Assembly:  CefSharp (in CefSharp.dll) Version: (
public static Task<JavascriptResponse> EvaluateScriptAsPromiseAsync(
	this IWebBrowser chromiumWebBrowser,
	string script,
	TimeSpan? timeout = null


Type: CefSharpIWebBrowser
The ChromiumWebBrowser instance this method extends.
Type: SystemString
The Javascript code that should be executed.
timeout (Optional)
Type: SystemNullableTimeSpan
(Optional) The timeout after which the Javascript code execution should be aborted.

Return Value

Type: TaskJavascriptResponse
TaskTResult that can be awaited to perform the script execution.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IWebBrowser. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
ArgumentOutOfRangeExceptionThrown when one or more arguments are outside the required range.
See Also