Defining Namespace or Nested Objects in JavaScript

JavaScript is a dynamic language. You can create objects on the fly, and objects can contain other objects, also it does not support the concept of namespace like C#.

Basically, a namespace is like a container which contains classes. In JavaScript you can achieve the same functionality as Namespace by creating nested objects. And since window itself is an object you can actually create objects directly into it. But if we would like to create an object in a non-existent nested namespace, we'll need to create that first. To gain a deeper understanding of namespaces and other JavaScript concepts, you can enroll in a Free JavaScript Course With Certificate. This course will provide you with practical insights into JavaScript namespaces, object manipulation, and much more.

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<script>
var MyNameSpace = {
 calculateVat: function (base) {
 return base * 1.21;
 },
 product: function (price) {
 this.price = price;
 this.getPrice = function () {
 return this.price;
 };
 },
 doCalculations: function () {
 var p = new MyNameSpace.product(100);
 alert(this.calculateVat(p.getPrice()));
 }
}

//instancing product class
var p = new MyNameSpace.product(150);
//calling product class method
alert(p.getPrice());
</script>

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Namespaces Nesting

<script>
var MyNameSpace = {
 calculateVat: function (base) {
 return base * 1.21;
 },
 MyNameSpace2: {
 product: function (price) {
 this.price = price;
 this.getPrice = function () {
 return this.price;
 };
 }
 },
 doCalculations: function () {
 var p = new MyNameSpace.product(100);
 alert(this.calculateVat(p.getPrice()));
 }
}

//instancing product class
var p = new MyNameSpace.MyNameSpace2.product(150);
//calling product class method
alert(p.getPrice());
</script>

Conclusion

Namespaces in JavaScript are a way to organize code and avoid naming conflicts by encapsulating variables, functions, and objects under a unique identifier. They help make large codebases more maintainable, modular, and readable, especially when multiple scripts or libraries are used together.

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