SP.ClientContext.applicationName property (sp.js)
Gets or sets the name of the runtime where the current client application is located.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.ClientContext.get_applicationName()
SP.ClientContext.set_applicationName(value)
Return value
String
The name of the runtime where the current client application is located.
Remarks
When setting this property, the value must be between 1 and 128 characters.