ezdirective makes it possible to create AngularJS directives without checking the documentation.

ezdirective.js

/*
 * ezdirective makes it possible to create AngularJS directives without
 * checking the documentation.
 *
 * Sane defaults are used (`restrict: 'E'` and `scope: {}`), and the link()
 * function is injected using $injector, which which can also inject the
 * `$scope`, `$elem`, and `attrs` that a normal directive link function would
 * expect.
 *
 * Examples:
 *
 *  // <url-loader url='/foo/bar'></url-loader>
 *  app.directive('url-loader', ezdirective({
 *    link: function(elem, attrs, $http) {
 *      $http.get(attrs.url)
 *        .success(function(result) {
 *          elem.textContent = result;
 *        });
 *        .error(function() {
 *          elem.textContent = "Error loading :(";
 *        })
 *    },
 *  }));
 *
 *  // <hello-world name="{{ someName }}"></hello-world>
 *  app.directive('helloWorld', ezdirective({
 *    template: '<div class="hello-world">Hello, {{ name }}. It is {{ time }}!</div>',
 *    scope: {
 *      name: '@',
 *    },
 *    link: function($scope, $interval) {
 *      $scope.time = new Date();
 *      var interval = $interval(function() {
 *        $scope.time = new Date();
 *      });
 *      $scope.on('$destroy', function() {
 *        $interval.cancel(interval);
 *      });
 *    },
 *  });
 *
 * Reminders for the magic scope characters:
 *   @: {{ interpolable }} string: greeting="Hello, {{ name }}"
 *   =: two-way bound data: ng-model="mymodel.foo"
 *   &: lazily evaluated function: callback="myCallback()"
 */

var angular = require('angular');

module.exports = function(directive) {
  var defaults = {
    scope: {},
    restrict: 'E',
  };
  return function($injector) {
    var result = angular.extend(defaults, directive);
    result.replace = (
      result.replace !== undefined?
        result.replace :
        !!(result.template || result.templateUrl)
    );
      
    var link = result.link;
    if (link) {
      result.link = function($scope, elem, attrs) {
        return $injector.invoke(link, this, {
          $scope: $scope,
          scope: $scope,
          elem: elem,
          attrs: attrs,
        });
      };
    }
    return result;
  };
};