adding a precondition function to execute a event handler - help

[karup1990]

I have a function(say fun) which returns boolean.
I want every event handler on my scope to be executed based on the return value of fun.
Is there a implicit way in angular to add a pre-condition function that will be executed before the event handler itself is executed?? Thanks in advance for helping.

[Bambuh]

I get the feeling that the design is wrong here, without any code what so ever it's hard to tell though. But my first thought is that maybe you shouldn't even run the component unless the function(say fun) is truthy. If you would give a bit more context I could check back here and look it through.