---
title: sourceFrame
framework: WebKit
role: symbol
role_heading: Instance Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, visionOS 27.0+]
path: webkit/wkjshandle/sourceframe
---

# sourceFrame

## Declaration

```swift
@NSCopying var sourceFrame: WKFrameInfo { get }
```

## Discussion

Discussion The frame from which the WKJSHandle originates and where it can be used. If the WKJSHandle is used as an argument to JavaScript in another frame or after the indicated frame has navigated, it will be interpreted as the JavaScript value undefined.