# JSStringIsEqualToUTF8CString(_:_:) Tests whether a JavaScript string matches a null-terminated UTF-8 string. ``` func JSStringIsEqualToUTF8CString(_ a: JSStringRef!, _ b: UnsafePointer!) -> Bool ``` ## Parameters `a` The [`JSStringRef`](/documentation/JavaScriptCore/JSStringRef) to test. `b` The null-terminated UTF-8 string to test. ## Return Value if the two strings match; otherwise, . ## Discussion --- Copyright © 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)