ReadyStateChangeHandler (GWT Javadoc)

```
public interface ReadyStateChangeHandler
```
A ready-state callback for an XMLHttpRequest object.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onReadyStateChange(XMLHttpRequest xhr)`	This is called whenever the state of the XMLHttpRequest changes.

- Method Detail
  - onReadyStateChange
```
void onReadyStateChange(XMLHttpRequest xhr)
```
    This is called whenever the state of the XMLHttpRequest changes. See XMLHttpRequest.setOnReadyStateChange(com.google.gwt.xhr.client.ReadyStateChangeHandler).
    
    Parameters:
    
    xhr - the object whose state has changed.