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

p.location-badge.
  exported from <a href='../di'>angular2/di</a>
  defined in <a href="https://github.com/angular/angular/tree/3a0410a/modules/angular2/src/di/exceptions.ts#L69-L103">angular2/src/di/exceptions.ts (line 69)</a>

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  Thrown when trying to retrieve an async <a href='Binding-class.html'><code>Binding</code></a> using the sync API.
  
  ## Example
  
  ```javascript
  var injector = Injector.resolveAndCreate([
    bind(Number).toAsyncFactory(() => {
      return new Promise((resolve) => resolve(1 + 2));
    }),
    bind(String).toFactory((v) => { return "Value: " + v; }, [String])
  ]);
  
  injector.asyncGet(String).then((v) => expect(v).toBe('Value: 3'));
  expect(() => {
    injector.get(String);
  }).toThrowError(AsycBindingError);
  ```
  
  The above example throws because `String` depends on `Number` which is async. If any binding in
  the dependency graph is async then the graph can only be retrieved using the `asyncGet` API.
  
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