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So I have some plugins and libraries I want to use in my angular app and (currently) I am simply referencing those functions/methods as they were intended in 99% of apps in a way that completely ignores dependency injection.
I have (for example) the javascript library "MomentJS" which deals with formatting and validating dates and I have uses for it throughout my app in controllers, services and filters. The way that I've learned (using AngularJS) is to create a service that references the function (and it's methods) and inject that service into my controllers, which works great.
The problem is that I really need to reference this library in all different kinds of components from services to filters to controllers and everything else. So, I guess my question is how do you do dependency injection in filters, services and everything else that isn't a controller?
Is this possible? Is this even beneficial?
Any help would be greatly appreciated :)
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Which Component can be Injected as a Dependency In AngularJS? In Angular. JS, dependencies are injected by using an “injectable factory method” or “constructor function”. These components can be injected with “service” and “value” components as dependencies.
Dependency Injection in AngularJS can be defines as the software design pattern which defines the way the software components are dependent on each other. AngularJS provides a set of components that can be injected in the form of dependencies such as factory, value, constant, service, and provider.
factory() is a method that takes a name and function that are injected in the same way as in service. The major difference between an AngularJS service and an AngularJS factory is that a service is a constructor function and a factory is not.
Note that you cannot inject "providers" into run blocks. The config method accepts a function, which can be injected with "providers" and "constants" as dependencies. Note that you cannot inject "services" or "values" into configuration.
Yes you can use dependency injection for filters and directives
Ex:
Filter:
app.filter('<filter>', ['$http', function(http){ return function(data){ } }]); Directive:
app.directive('<directive>', ['$http', function(http){ return { .... } }]); Service:
app.factory('<service>', ['$http', function(http) { var shinyNewServiceInstance; return shinyNewServiceInstance; }]); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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