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msLaunchUri method

This method is used to start a service or app, such as an email client, that handles a given protocol. The Uniform Resource Identifier (URI) contains the protocol for the default service or app, such as mailto://john@contoso.com.

Internet Explorer 10

 

Syntax

navigator.msLaunchUri(uri, successCallback, noHandlerCallback);

Parameters

uri [in]

Type: DOMString

URL containing protocol of the document or resource to be displayed.

successCallback [in, optional]

Type: MSLaunchUriCallback

Function to be executed if the protocol handler is present.

noHandlerCallback [in, optional]

Type: MSLaunchUriCallback

Function to be executed if the protocol handler isn't present.

Return value

This method does not return a value.

Standards information

There are no standards that apply here.

Remarks

If a default protocol handler is available on the system that matches the URI, the successCallback is invoked, otherwise, the noHandlerCallback is called.

To help protect a user's privacy, Windows displays a prompt for the user to allow the service or app to be launched. The user can choose to not see the prompt after the first instance for a particular protocol and automatically open the app or service without a user intervention. The msLaunchUri method does not support HTTP, Secure Hypertext Transfer Protocol (HTTPS), File Transfer Protocol (FTP), file, res, JavaScript, or Microsoft Visual Basic Scripting Edition (VBScript) protocols.

If the user's system does not have a program registered to handle a specific protocol, and a noHandlerCallback is provided, Windows Internet Explorer will invoke the noHandlerCallback. This enables developers to provide a custom fallback experience for the user. If a handler doesn't exist, and the developer doesn't provide a noHandlerCallback, then Internet Explorer displays a dialog that asks the user if they want to allow the action. If the user allows it, the user is then prompted to look in the Windows Store for an app to handle the protocol.

If multiple programs are registered on the system for the given protocol and no default has been chosen, Windows prompts the user to choose one.

See also

navigator

 

 

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