new Command
A Command is a function with an extra canExecute observable property to determine
whether the command can be executed. When executed, a Command function will check the
value of canExecute and throw if false.
This type describes an interface and is not intended to be instantiated directly.
See createCommand to create a command from a function.
Source:
Members
-
afterExecute :Event
-
Gets an event which is raised after the command executes, the event is raised with the return value of the command as its only parameter.
- Default Value:
- undefined
-
beforeExecute :Event
-
Gets an event which is raised before the command executes, the event is raised with an object containing two properties: a
cancelproperty, which if set to false by the listener will prevent the command from being executed, and anargsproperty, which is the array of arguments being passed to the command.- Default Value:
- undefined
-
canExecute :Boolean
-
Gets whether this command can currently be executed. This property is observable.
- Default Value:
- undefined