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IJsDialogHandlerOnJSDialog Method
Version 51.0.0
Called to run a JavaScript dialog.

Namespace: CefSharp
Assembly: CefSharp (in CefSharp.dll) Version: (
bool OnJSDialog(
	IWebBrowser browserControl,
	IBrowser browser,
	string originUrl,
	CefJsDialogType dialogType,
	string messageText,
	string defaultPromptText,
	IJsDialogCallback callback,
	ref bool suppressMessage


Type: CefSharpIWebBrowser
the browser control
Type: CefSharpIBrowser
the browser object
Type: SystemString
originating url
Type: CefSharpCefJsDialogType
Dialog Type
Type: SystemString
Message Text
Type: SystemString
value will be specified for prompt dialogs only
Type: CefSharpIJsDialogCallback
Callback can be executed inline or in an async fashion
Type: SystemBoolean
Set suppressMessage to true and return false to suppress the message (suppressing messages is preferable to immediately executing the callback as this is used to detect presumably malicious behavior like spamming alert messages in onbeforeunload). Set suppressMessage to false and return false to use the default implementation (the default implementation will show one modal dialog at a time and suppress any additional dialog requests until the displayed dialog is dismissed).

Return Value

Type: Boolean
Return true if the application will use a custom dialog or if the callback has been executed immediately. Custom dialogs may be either modal or modeless. If a custom dialog is used the application must execute |callback| once the custom dialog is dismissed.
See Also