---
title: "init(source:injectionTime:forMainFrameOnly:inContentWorld:)"
framework: webkit
role: symbol
role_heading: Initializer
path: "webkit/wkuserscript/init(source:injectiontime:formainframeonly:incontentworld:)"
---

# init(source:injectionTime:forMainFrameOnly:inContentWorld:)

## Declaration

```swift
init(source: String, injectionTime: WKUserScriptInjectionTime, forMainFrameOnly: Bool, inContentWorld contentWorld: WKContentWorld)
```