angularjs - Detect if a function is bounded to the scope with & -


I have a directive popup in which it has a separate scope with a function bond:

Template 

  & lt; Popups & gt; & Lt; Div class = "confirm-button" ng-show = "showConfirmbutton" ng-click = "on confirm ()" & gt; Confirmation & lt; / Div & gt; & Lt; / Popup & gt;

Director & Controller 

  Angular Modules ('app.directives'). Instructions ('popup', [function] {"strict use"; return {restricted: 'e', ​​scope: {onConfirm: "& amp;"}, administrator: 'popup Ctrl', templateUrl: "partial / instructions / Popup.html "};}]); Angular.module ('app.controllers') controller (' popup ctrl ', [function ($ scope) {"strict use."; $ Scope.showConfirmButton = typeof $ scope.onConfirm === "function'; // Always correct: (// ...}]);

Usage 

  & popup onConfirm = "doSomething () "& Gt; & lt; / popup & gt;

What do I want to do: If a function is not bound to end-configure, then I confirm I want to hide the button.

This does not work, because $ scope.on type type. Confirm on === 'Function'; is always correct. If I inspect my area in order, I think that assesses $ scope (.onConfirm.toString) - regardless of Whether or not I have a bond function: 

  "function (locals) {return parentGet (scope, local people);}"  
  edit   
 Anyone knows a way to find out if some functions & amp; Is it bound to confirm or not?   
 Its a planner (simplified):  
   
 
 
 You can add the linking function to the directive and check for the attribute value whether something is assigned: -  
  link: function (scope, elm), etr ) {Scope.showConfirmButton = !! Attr.on Confirm; },  
 
 Also keep in mind that your separate scope has defined the attribute as  onConfirm , so you can call it  on-confirm  Need to be used as. I.e 
 
  & lt; Popup on-strength = "doSomething ()" & gt; & Lt; / Popup & gt;             As far as I know, because they are going internally into the scope chain.  
 Or as a hack you can see in the field of parents:  
  .directive ('popup return (restricted: "e", scope: { OnConfirm: "& amp;", Controller: 'popup-ctrl', link: function ('$ parse', function ($ paras) scope, elm, attr) {var elm = $ parse (attr.onConfirm) (scope) $ Parent); scope.showConfirmButton = !! attr.onConfirm & hasFunction (attr.onConfirm); function hasFunction (function) {return angular.isFunction ($ parse (func.substring (0, func. IndexOf ('('))) (scope $ parent));}} template: ''
-

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