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# webView(_:navigationResponse:didBecome:)

Tells the delegate that a navigation response became a download.

```
optional func webView(_ webView: WKWebView, navigationResponse: WKNavigationResponse, didBecome download: WKDownload)
```

## Parameters

`webView`

The web view in which the navigation response took place.

`navigationResponse`

Descriptive information about the navigation response that turned into a download.

`download`

An object that represents the download of a web resource.

## Discussion

Implement this method to begin tracking download progress.

---

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