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# WebViewProgressStartedNotification

Posted by a WebView object when a load begins, including a load that is initiated in a subframe.

```
extern NSString * WebViewProgressStartedNotification;
```

## Discussion

The notification object is the WebView that began loading. This notification does not contain a `userInfo` dictionary.

## See Also

[`estimatedProgress`](/documentation/WebKit/WebView-swift.class/estimatedProgress)

An estimate, as a percentage, of the amount of content that is currently loaded.


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