Update JSTypedArray.swift

j-f1 · j-f1 · commit 8c493be83c7a · 2020-08-14T16:52:55.000-04:00
diff --git a/Sources/JavaScriptKit/JSTypedArray.swift b/Sources/JavaScriptKit/JSTypedArray.swift
@@ -30,7 +30,8 @@ public class JSTypedArray<Element>: JSObjectRef, ExpressibleByArrayLiteral where
         super.init(id: jsObject.id)
     }
 
-    public init(objectRef jsObject: JSObjectRef) {
+    public init?(objectRef jsObject: JSObjectRef) {
+        guard jsObject.isInstanceOf(Element.typedArrayClass) else { return nil }
         _retain(jsObject.id)
         super.init(id: jsObject.id)
     }

Original file line number	Diff line number	Diff line change
`@@ -30,7 +30,8 @@ public class JSTypedArray<Element>: JSObjectRef, ExpressibleByArrayLiteral where`
`30`	`30`	`super.init(id: jsObject.id)`
`31`	`31`	`}`
`32`	`32`
`33`		`- public init(objectRef jsObject: JSObjectRef) {`
	`33`	`+ public init?(objectRef jsObject: JSObjectRef) {`
	`34`	`+ guard jsObject.isInstanceOf(Element.typedArrayClass) else { return nil }`
`34`	`35`	`_retain(jsObject.id)`
`35`	`36`	`super.init(id: jsObject.id)`
`36`	`37`	`}`