I recently read a chapter of David Herman's Effective JavaScript[1] that talked about preserving the async contract even if you cache results (ie. can return wi

I recently read a chapter of David Herman's Effective JavaScript[1] that talked about preserving the async contract even if you cache results (ie. can return without an async call from the caller). Try: if (connectionInstance) { setTimeout(function(){callback(connectionInstance)}, 0); return; } That way your async functions will always behave the same way. [1] http://effectivejs.com/ http://effectivejs.com/