func pass obj

https://blog.techbridge.cc/2018/06/23/javascript-call-by-value-or-reference/

https://stackoverflow.com/questions/8708632/passing-objects-by-reference-or-value-in-c-sharp

https://stackoverflow.com/questions/16880418/javascript-pass-object-as-reference

https://stackoverflow.com/questions/518000/is-javascript-a-pass-by-reference-or-pass-by-value-language