- iOS 7.0+
- macOS 10.5+
- tvOS 9.0+
The class to use when creating the global object. Pass NULL to use the default object class.
A JSGlobalContext with a global object of class globalObjectClass.
In WebKit version 4.0 and later, the context is created in a unique context group. Therefore, scripts may execute in it concurrently with scripts executing in other contexts. However, you may not use values created in the context in other contexts.