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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript Copy by Reference</title> </head> <body> <script> var person = { name: "Peter", age: 28, gender: "Male" }; var user = person; // Assign person variable to a new variable user.name = "Harry"; document.write(person.name + "<br>"); // Prints: Harry document.write(user.name); // Prints: Harry </script> </body> </html>
