AngularJS: steer clear of relying on the 'angular' global variable

Is it advisable to refrain from using the 'angular' global object within Controllers, Services, etc?

Suppose we want to call the function:

angular.isDefined(myVar)

How should we reference the 'angular' object?

Possible approaches:

1 Use it directly, accepting possible 'variable is not defined' warnings from IDEs

2 Refer to the 'angular' dependency in an AMD compliant manner

define([
        'angular'
    ], function (angular) {
        'use strict';

        return ['$log', '$filter', function ($log, $filter) {
            return {
                // ... code ...
                angular.isDefined(myVar);
            };
        }];
    }
);

3 Reference 'angular' using the Angular specific method

module.factory('ang', function() { return angular; });

define([], function () {
        'use strict';

        return ['ang', '$log', '$filter', function (ang, $log, $filter) {
            return {
                // ... code ...
                ang.isDefined(myVar);
            };
        }];
    }
);

I personally prefer Option 3, but am open to suggestions on the best approach.

Answer №1

If you're utilizing Angular, you can rest assured that it won't be undefined. The key now is tackling it as a static analysis issue... ensuring the reference to the global variable is crystal clear.

While the two solutions you provided are effective, there are a few other possibilities:

  • Utilize $window and explicitly refer to $window.angular
  • Adjust your static analysis tool to recognize that angular is defined elsewhere. This can be accomplished through the use of the globals property in .jshintrc.

To avoid warnings during file analysis, I would suggest combining the use of $window with option 3:

module.factory('ang', function($window) { return $window.angular; });

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