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<html><body><h1>JavaScript Objects</h1><h2>The Object.defineProperty() Method</h2><p>JavaScript Getters and Setters are perfect for creating counters:</p><p id="demo"></p><script>// Define an objectconst obj = {counter:0};// Define Setters and GettersObject.defineProperty(obj, "reset", { get : function () {this.counter = 0;}});Object.defineProperty(obj, "increment", { get : function () {this.counter++;}});Object.defineProperty(obj, "decrement", { get : function () {this.counter--;}});Object.defineProperty(obj, "add", { set : function (value) {this.counter += value;}});Object.defineProperty(obj, "subtract", { set : function (value) {this.counter -= value;}});// Play with counter:obj.reset;obj.add = 5;obj.subtract = 1;obj.increment;obj.decrement;document.getElementById("demo").innerHTML = obj.counter;</script></body></html>