Do Class

• when
• fn
• obj
• sFn
• c

Defined in event-custom/js/event-do.js:109

Execute the supplied method before or after the specified function. Used by before and after.

Parameters:

• when String

  before or after

• fn Function

  the function to execute

• obj Object

  the object hosting the method to displace

• sFn String

  the name of the method to displace

• c Object

  The execution context for fn

Returns:

• fn
• obj
• sFn
• c
• arg

Defined in event-custom/js/event-do.js:72

Execute the supplied method after the specified function. Wrapping function may optionally return an instance of the following classes to further alter runtime behavior:

Y.Do.Halt(message, returnValue)

Immediatly stop execution and return returnValue. No other wrapping functions will be executed.

Y.Do.AlterReturn(message, returnValue)

Return returnValue instead of the wrapped method's original return value. This can be further altered by other after phase wrappers.

The static properties Y.Do.originalRetVal and Y.Do.currentRetVal will be populated for reference.

Parameters:

• fn Function

  the function to execute

• obj Object

  the object hosting the method to displace

• sFn String

  the name of the method to displace

• c Object

  The execution context for fn

• arg Mixed multiple

  0..n additional arguments to supply to the subscriber

Returns:

• fn
• obj
• sFn
• c
• arg

Defined in event-custom/js/event-do.js:34

Execute the supplied method before the specified function. Wrapping function may optionally return an instance of the following classes to further alter runtime behavior:

Y.Do.Halt(message, returnValue)

Immediatly stop execution and return returnValue. No other wrapping functions will be executed.

Y.Do.AlterArgs(message, newArgArray)

Replace the arguments that the original function will be called with.

Y.Do.Prevent(message)

Don't execute the wrapped function. Other before phase wrappers will be executed.

Parameters:

• fn Function

  the function to execute

• obj Object

  the object hosting the method to displace

• sFn String

  the name of the method to displace

• c Object

  The execution context for fn

• arg Mixed multiple

  0..n additional arguments to supply to the subscriber when the event fires.

Returns:

• handle

Defined in event-custom/js/event-do.js:153

Detach a before or after subscription.

Parameters:

• handle EventHandle

  the subscription handle

Defined in event-custom/js/event-do.js:180

Available since 3.2.0

Contains the current state of the return value, consumable by 'after' event listeners, and updated if an after subscriber changes the return value generated by the wrapped function.

Defined in event-custom/js/event-do.js:20

Deprecated: Since 3.6.0. The `_yuiaop` property on the AOP'd object replaces the role of this property, but is considered to be private, and is only mentioned to provide a migration path. If you have a use case which warrants migration to the _yuiaop property, please file a ticket to let us know what it's used for and we can see if we need to expose hooks for that functionality more formally.

Cache of objects touched by the utility

Defined in event-custom/js/event-do.js:171

Available since 3.2.0

Contains the return value from the wrapped method, accessible by 'after' event listeners.