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<!DOCTYPE html> <html> <body> <h1>JavaScript Objects</h1> <h2>Objects are Mutable</h2> <p>Changes to a copy of an object will also change the original object:</p> <p id="demo"></p> <script> // Create an Object const person = { firstName: "John", lastName: "Doe", age: 50, eyeColor: "blue" }; // Create a Copy const x = person; // Change Age x.age = 10; document.getElementById("demo").innerHTML = person.firstName + " is " + person.age + " years old."; </script> </body> <!-- /js/tryit.asp?filename=tryjs_object_mutable Thu, 06 Feb 2025 18:15:27 GMT --> </html>
