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docs(aio): several fix for ngmodule guides (#21517)

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PR Close #21517
This commit is contained in:
Trotyl
2018-01-13 16:47:27 +08:00
committed by Miško Hevery
parent cf8d512e43
commit bc1e22922a
5 changed files with 8 additions and 8 deletions
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6
aio/content/guide/providers.md
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@ -10,7 +10,7 @@ see the <live-example></live-example>.
<hr>
## Create a service
You can provide services to your app by using the providers array in an NgModule.
You can provide services to your app by using the `providers` array in an NgModule.
Consider the default app generated by the CLI. In order to add a user service to it,
you can generate one by entering the following command in the terminal window:
@ -20,7 +20,7 @@ ng generate service User
This creates a service called `UserService`. You now need to make the service available in your
app's injector. Update `app.module.ts` by importing it with your other import statements at the top
of the file and adding it to the providers array:
of the file and adding it to the `providers` array:
<code-example path="providers/src/app/app.module.ts" title="src/app/app.module.ts" linenums="false">
</code-example>
@ -28,7 +28,7 @@ of the file and adding it to the providers array:
## Provider scope
When you add a service provider to the providers array of the root module, it’s available throughout the app. Additionally, when you import a module that has providers, those providers are also available to all the classes in the app as long they have the lookup token. For example, if you import the `HttpClientModule` into your `AppModule`, its providers are then available to the entire app and you can make HTTP requests from anywhere in your app.
When you add a service provider to the `providers` array of the root module, it’s available throughout the app. Additionally, when you import a module that has providers, those providers are also available to all the classes in the app as long they have the lookup token. For example, if you import the `HttpClientModule` into your `AppModule`, its providers are then available to the entire app and you can make HTTP requests from anywhere in your app.
## Limiting provider scope by lazy loading modules