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# reloadContentBlocker(withIdentifier:completionHandler:)

Tells Safari to reload the specified extension’s content-blocking rules.

```
class func reloadContentBlocker(withIdentifier identifier: String, completionHandler: (@Sendable ((any Error)?) -> Void)? = nil)
```

## Parameters

`identifier`

The bundle identifier of your content blocker extension.

`completionHandler`

The code to run after the content-blocking rules are reloaded.

## Discussion

> Important:
> You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:
> 
> ```swift
> class func reloadContentBlocker(withIdentifier identifier: String) async throws
> ```
> 
> For information about concurrency and asynchronous code in Swift, see <doc://com.apple.documentation/documentation/Swift/calling-objective-c-apis-asynchronously>.

Call this method when your extension’s content-blocking rules change.

---

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