AngularJS Checkbox Group Directive

HTML

<div ng-app="app" ng-controller="ctrl">
    <form name="frm">
        Words: <input type="text" name="words" ng-model="words" />
    </form>
    
    <pre>{{ frm | json }}</pre>
</div>

JavaScript

angular.module('app',[])
.controller('ctrl', fuction($scope) {
            
 })
.directive('checkboxGroup', function($log) {
    
});