An example of a directive that reads and writes to scope.

gistfile1.js

laiApp.directive('demoGreet', function( $parse ) {
  return {
    link: function linkFn(scope, element, attrs) {
      console.log('linkingFn(', scope, element, attrs, ')');

      // read out of the scope
      scope.$watch( attrs.demoGreet, function ( data ) {
        element.text('Hello ' + data.name + '!' );
      }, true);

      element.bind( 'click', function() {
        console.log( 'click', Error().stack );
        // write to scope using apply and parse
        scope.$apply( function () {
          $parse( attrs.demoGreet).assign(scope, 'abc');
        });
      });

    }
  }
});