### 返回值:Deferred Objectdeferred.progress(progressCallbacks)
### 概述
當Deferred對象時生成進度通知時添加被訪問處理程序。
這個參數可以是一個單一的功能或功能的陣列。當遞延通過調用生成的進度通知notify或notifyWith，progressCallbacks?被訪問。后來deferred.progress()返回Deferred對象。Deferred對象有方法可以鏈接到這一個。當遞延解決或拒絕，進展回調將不再被調用。欲了解更多信息，請參閱文檔[Deferred object](http://www.css88.com/category/deferred-object/)。
### 參數
#### **progressCallbacks ***V1.7*
一個函數或函數數組，被呼叫遞延生成進度通知。
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- def.progress([type],[target])
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- def.notify(args)
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- def.state()
- Callbacks
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- callbacks.has(callback)
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- 關于
- 關于jQuery API 文檔
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