---
title: isActive
framework: USDKit
role: symbol
role_heading: Instance Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: usdkit/usdprim/spec/isactive
---

# isActive

Whether this prim is active in composition, or nil if not authored.

## Declaration

```swift
var isActive: Bool? { get nonmutating set }
```