Use this skill for JavaScriptKit Swift package implementation and review in Swift-on-Wasm projects, including `import JavaScriptKit`, `JSObject`, `JSValue`, `JSClosure`, `JSOneshotClosure`, `JSException`, `JSObject.global`, DOM and browser API calls, Swift-JavaScript value conversion, JavaScript promises with Swift async/await, `JavaScriptEventLoop`, `JavaScriptBigIntSupport`, `JavaScriptFoundationCompat`, and PackageToJS packaging.
