---
title: "JSObjectHasProperty(_:_:_:)"
framework: javascriptcore
role: symbol
role_heading: Function
path: "javascriptcore/jsobjecthasproperty(_:_:_:)"
---

# JSObjectHasProperty(_:_:_:)

Tests whether an object has a specified property.

## Declaration

```swift
func JSObjectHasProperty(_ ctx: JSContextRef!, _ object: JSObjectRef!, _ propertyName: JSStringRef!) -> Bool
```

## Parameters

- `object`: The doc://com.apple.javascriptcore/documentation/JavaScriptCore/JSObjectRef to test.
- `propertyName`: A doc://com.apple.javascriptcore/documentation/JavaScriptCore/JSStringRef that contains the property’s name.

## Return Value

Return Value true if the object has a property with a name that matches propertyName; otherwise, false.

## See Also

### Working with Objects

- [JSObjectCallAsConstructor(_:_:_:_:_:)](javascriptcore/jsobjectcallasconstructor(_:_:_:_:_:).md)
- [JSObjectCallAsFunction(_:_:_:_:_:_:)](javascriptcore/jsobjectcallasfunction(_:_:_:_:_:_:).md)
- [JSObjectCopyPropertyNames(_:_:)](javascriptcore/jsobjectcopypropertynames(_:_:).md)
- [JSObjectDeleteProperty(_:_:_:_:)](javascriptcore/jsobjectdeleteproperty(_:_:_:_:).md)
- [JSObjectGetPrivate(_:)](javascriptcore/jsobjectgetprivate(_:).md)
- [JSObjectGetProperty(_:_:_:_:)](javascriptcore/jsobjectgetproperty(_:_:_:_:).md)
- [JSObjectGetPropertyAtIndex(_:_:_:_:)](javascriptcore/jsobjectgetpropertyatindex(_:_:_:_:).md)
- [JSObjectGetPrototype(_:_:)](javascriptcore/jsobjectgetprototype(_:_:).md)
- [JSObjectIsConstructor(_:_:)](javascriptcore/jsobjectisconstructor(_:_:).md)
- [JSObjectIsFunction(_:_:)](javascriptcore/jsobjectisfunction(_:_:).md)
- [JSObjectMake(_:_:_:)](javascriptcore/jsobjectmake(_:_:_:).md)
- [JSObjectMakeArray(_:_:_:_:)](javascriptcore/jsobjectmakearray(_:_:_:_:).md)
- [JSObjectMakeConstructor(_:_:_:)](javascriptcore/jsobjectmakeconstructor(_:_:_:).md)
- [JSObjectMakeDate(_:_:_:_:)](javascriptcore/jsobjectmakedate(_:_:_:_:).md)
- [JSObjectMakeError(_:_:_:_:)](javascriptcore/jsobjectmakeerror(_:_:_:_:).md)