angular-docs-cn/public/docs/js/latest/api/di/HostMetadata-class.jade

p.location-badge.
  exported from <a href='../di'>angular2/di</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.34/modules/angular2/src/di/metadata.ts#L138-L166">angular2/src/di/metadata.ts (line 138)</a>

:markdown
  Specifies that an injector should retrieve a dependency from any injector until reaching the
  closest host.
  
  ## Example
  
  ```
  class Dependency {
  }
  
  class NeedsDependency {
    constructor(public @Host() dependency:Dependency) {}
  }
  
  var parent = Injector.resolveAndCreate([
    bind(Dependency).toClass(HostDependency)
  ]);
  var child = parent.resolveAndCreateChild([]);
  var grandChild = child.resolveAndCreateChild([NeedsDependency, Depedency]);
  var nd = grandChild.get(NeedsDependency);
  expect(nd.dependency).toBeAnInstanceOf(HostDependency);
  ```
  
  

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  h2 Annotations
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    h3.annotation CONST
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      code.
        @CONST()


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  h2 Members
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    h3 toString

    
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      code.
        toString()
    
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