<!--
{
  "availability" : [
    "macOS: 10.3.0 - 10.14.0"
  ],
  "documentType" : "symbol",
  "framework" : "WebKit",
  "identifier" : "/documentation/WebKit/WebViewProgressEstimateChangedNotification",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "WebKit"
    ],
    "preciseIdentifier" : "c:@WebViewProgressEstimateChangedNotification"
  },
  "title" : "WebViewProgressEstimateChangedNotification"
}
-->

# WebViewProgressEstimateChangedNotification

Posted by a WebView object when the estimated progress value of a load changes.

```
extern NSString * WebViewProgressEstimateChangedNotification;
```

## Discussion

This notification may be posted zero or more times after a [`WebViewProgressStartedNotification`](/documentation/WebKit/WebViewProgressStartedNotification) notification is posted. The notification object is the WebView for which the progress value has changed. 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.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)