javascript constructors question

Question

my changename method in object constructor is not changing name plz help
https://code.sololearn.com/Whpm3E4GYEI2/?ref=app

Answer 1

「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」 thanks

Answer 2

「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」
so in javascript i need to include this keyword to display or access the value of an instance?
plz help i am getting way too confused here, things are different from c# or is it that i missing something? 😩

https://code.sololearn.com/ckTWS9gN5aEJ/?ref=app