javascript - Passing a form to a directive: undefined -


i've got code (updated)

html

<body ng-controller="mainctrl">     <form name="form" novalidate>       <directive form="form.test" required       ><input type="text" ng-model="text" name="test" required="true" /></directive>       <button ng-click="click()">click me</button>     </form>   </body>

javascript

app.controller('mainctrl', function($scope) {   $scope.click = function(){     console.log('click');   } });  app.directive('directive', function() {   return {     transclude: true,     replace: true,     scope: {       form: '=',     },     template: '<div>',     link: function(scope, element, attrs, ctrl, transcludefn) {       var inputdiv = angular.element('<div>')       transcludefn(scope, function(clone){         inputdiv.append(clone);       })       element.append(inputdiv);       scope.$watch(function(){         return scope.form.$error;       }, function(newvalue){           console.log('newvalue', newvalue);       }, true)     }   } });

every time click on button error of form being undefined. try here: http://plnkr.co/edit/pl76wo4ajigh0m7b5nqd?p=preview

i see 2 things changed, first i'd add ng-model attribute text input , ng-required attribute error tracked model's controller

<input type="text" ng-model="test" ng-required="true" />

next need include objectequality parameter on $watch, watch changes on $error object properties 

scope.$watch(function(scope) {   return scope.form[scope.towatch].$error; }, function(newvalue) {   // newvalue $error object input }, true); // notice last true value here, that's objectequality parameter

here's updated plnkr: http://plnkr.co/edit/lnghwgzf5zbnqruxh4gp?p=preview


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