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<html><body><h2>JavaScript Object Properties</h2><p>Access a property with ["property"]:</p><p id="demo"></p><script>const person = { firstname: "John", lastname: "Doe", age: 50, eyecolor: "blue"};document.getElementById("demo").innerHTML = person["firstname"] + " is " + person["age"] + " years old.";</script></body><!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_object_properties2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 16:49:21 GMT --></html>