Possible to provide parameters to when-confirmed function?

[dwightdegroff]

When I attempt to provide function parameters to the "when-confirmed" attribute, the function is executed as the confirmable directive is loaded. For example:
<confirmable when-confirmed="delete(12345)" ...
whereas:
<confirmable when-confirmed="delete" ...
simply confirms that "delete" is a function. Is it, perhaps, related to how that function verification is performed?

Is there a recommended way to provide such parameters? Thanks in advance.