https://en.wikipedia.org/wiki/Immediately-invoked_function_expression https://en.wikipedia.org/wiki/Immediately-invoked_function_e... first "bad" example will

https://en.wikipedia.org/wiki/Immediately-invoked_function_expression https://en.wikipedia.org/wiki/Immediately-invoked_function_e... first "bad" example will work just fine if you replace "var i/marker" with "let i/marker"