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<html><body><h2>JavaScript Object.defineProperty()</h2><p>This example adds a new property to an object.</p><p id="demo"></p><script>// Create an object:const person = { firstName: "John", lastName: "Doe", language: "EN"};// Add a propertyObject.defineProperty(person, "year", {value:"2008"})document.getElementById("demo").innerHTML = person.year;</script></body><!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_object_es5_1 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:06:53 GMT --></html>