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<!DOCTYPE html> <html> <body> <h1>JavaScript Object</h1> <h2>The getOwnPropertyNames() Method</h2> <p>This example list all the properties of an object.</p> <p id="demo"></p> <script> // Create an Object: const person = { firstName: "John", lastName: "Doe", language: "EN" } // Display all Properties document.getElementById("demo").innerHTML = Object.getOwnPropertyNames(person); </script> </body> </html>
