---
title: "JSClassRetain(_:)"
framework: javascriptcore
role: symbol
role_heading: Function
path: "javascriptcore/jsclassretain(_:)"
---

# JSClassRetain(_:)

Retains a JavaScript class.

## Declaration

```swift
func JSClassRetain(_ jsClass: JSClassRef!) -> JSClassRef!
```

## Parameters

- `jsClass`: The doc://com.apple.javascriptcore/documentation/JavaScriptCore/JSClassRef to retain.

## Return Value

Return Value A JSClassRef that is the same as jsClass.

## See Also

### Working with Classes

- [JSClassCreate(_:)](javascriptcore/jsclasscreate(_:).md)
- [JSClassRelease(_:)](javascriptcore/jsclassrelease(_:).md)
- [kJSClassDefinitionEmpty](javascriptcore/kjsclassdefinitionempty.md)
- [JSClassDefinition](javascriptcore/jsclassdefinition.md)
- [JSClassAttribute](javascriptcore/jsclassattribute.md)