61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
|
|
p.
|
|
<span class="location-badge">exported from <a href="/angular2/annotations">angular2/annotations</a></span>
|
|
defined in <a href="https://github.com/angular/angular/tree/master/modules/angular2/src/core/annotations/visibility.js#L44">angular2/src/core/annotations/visibility.js (line 44)</a>
|
|
|
|
:markdown
|
|
Specifies that an injector should retrieve a dependency from the direct parent.
|
|
|
|
## Example
|
|
|
|
Here is a simple directive that retrieves a dependency from its parent element.
|
|
|
|
```
|
|
@Decorator({
|
|
selector: '[dependency]',
|
|
properties: {
|
|
'id':'dependency'
|
|
}
|
|
})
|
|
class Dependency {
|
|
id:string;
|
|
}
|
|
|
|
|
|
@Decorator({
|
|
selector: '[my-directive]'
|
|
})
|
|
class Dependency {
|
|
constructor(@Parent() dependency:Dependency) {
|
|
expect(dependency.id).toEqual(1);
|
|
};
|
|
}
|
|
```
|
|
|
|
We use this with the following HTML template:
|
|
|
|
```
|
|
<div dependency="1">
|
|
<div dependency="2" my-directive></div>
|
|
</div>
|
|
```
|
|
The `@Parent()` annotation in our constructor forces the injector to retrieve the dependency from the
|
|
parent element (even thought the current element could resolve it): Angular injects `dependency=1`.
|
|
|
|
.l-main-section
|
|
h2 Members
|
|
.l-sub-section
|
|
h3 constructor
|
|
|
|
|
|
pre.prettyprint
|
|
code.
|
|
constructor()
|
|
|
|
|
|
:markdown
|
|
|
|
|
|
|
|
|