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docs(guide/di): fix headings hierarchy

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Ore Landau 2013-06-13 13:12:51 +03:00 committed by Pete Bacon Darwin
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@ -105,17 +105,17 @@ dependencies of `MyController` without the controller ever knowing about the inj
the best outcome. The application code simply asks for the dependencies it needs, without having to
deal with the injector. This setup does not break the Law of Demeter.
# Dependency Annotation
## Dependency Annotation
How does the injector know what service needs to be injected?
The application developer needs to provide annotation information that the injector uses in order
to resolve the dependencies. Throughout Angular certain API functions are invoked using the
to resolve the dependencies. Throughout Angular, certain API functions are invoked using the
injector, as per the API documentation. The injector needs to know what services to inject into
the function. Below are three equivalent ways of annotating your code with service name
information. These can be used interchangeably as you see fit and are equivalent.
# Inferring Dependencies
### Inferring Dependencies
The simplest way to get hold of the dependencies, is to assume that the function parameter names
are the names of the dependencies.
@ -134,7 +134,7 @@ While straightforward, this method will not work with JavaScript minifiers/obfus
rename the method parameter names. This makes this way of annotating only useful for {@link
http://www.pretotyping.org/ pretotyping}, and demo applications.
# `$inject` Annotation
### `$inject` Annotation
To allow the minifers to rename the function parameters and still be able to inject right services
the function needs to be annotated with the `$inject` property. The `$inject` property is an array
@ -153,7 +153,7 @@ function declaration.
This method of annotation is useful for controller declarations since it assigns the annotation
information with the function.
# Inline Annotation
### Inline Annotation
Sometimes using the `$inject` annotation style is not convenient such as when annotating
directives.
@ -189,11 +189,11 @@ For this reason the third annotation style is provided as well.
Keep in mind that all of the annotation styles are equivalent and can be used anywhere in Angular
where injection is supported.
# Where can I use DI?
## Where can I use DI?
DI is pervasive throughout Angular. It is typically used in controllers and factory methods.
## DI in controllers
### DI in controllers
Controllers are classes which are responsible for application behavior. The recommended way of
declaring controllers is:
@ -209,7 +209,7 @@ declaring controllers is:
</pre>
## Factory methods
### Factory methods
Factory methods are responsible for creating most objects in Angular. Examples are directives,
services, and filters. The factory methods are registered with the module, and the recommended way