I'm feeling completely lost when it comes to understanding inject in Angular. I can't seem to grasp where it should be utilized and its purpose. Is it specifically tied to factory methods, as outlined here?
myController.$inject = ['$scope','notify'];
In this context, notify represents the factory being referenced.
One way to handle Dependency Injection after minifying your code is by using alternative methods.
In AngularJS, when you declare a controller, the function includes parameters like:
function ($scope, notify)
After minification, the function parameters may be renamed, causing issues with DI. To address this problem, AngularJS offers different ways to declare controllers and other services:
For controllers, you can use the $inject method. By passing an array of literals corresponding to the function's parameters, such as
['$scope', 'notify']
You ensure that the correct objects are injected into your function.
Another approach is to utilize the array literal syntax when declaring new controllers or services. This involves specifying dependencies within the same statement, like:
angular.module('myModule').controller('MyController', ['$scope', 'notify', function ($scope, notify) {
...
}]);
This method clearly maps the DI objects to the function parameters for improved readability and understanding.
Personally, I find Option #2 for declaring controllers easier to comprehend as everything is consolidated in one place.
In addition to @mark's response, it's worth noting that utilizing the $inject method in this way:
MyController.$inject = ['$scope', 'notify'];
enables you to specify injection dependencies when creating providers, which are the only angular elements that do not allow for the 'friendly' annotation style such as:
.controller('MyController', ['$scope', 'notify',...
for declaring dependencies.
When utilizing $inject, it is important to follow this structure:
function ApplicationController($scope){
$scope.greet = "Foo is Not Great!5";
}
ApplicationController.$inject = ['$scope','$ionic'];
app.controller('ApplicationController', ApplicationController);
This practice is necessary in order to safeguard the code from potential issues with obfuscation or minification.
In some instances, function(firstName,lastName) may be transformed into function(n,m).
For AngularJS specifically, altering $scope to 's' can cause the code to malfunction since AngularJS relies on the use of the $ sign to identify specific components within the code.
When the ng-strict-di attribute is present, it is essential to adhere to this specific format.
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