How to declare namespace in JavaScript ?
Last Updated :
31 Jan, 2022
The coding standard of assigning scope to identifiers (names of types, functions, variables, and so on) to avoid conflicts between them is known as a namespace. It is a framework for a collection of identifiers, functions, and methods. It gives its contents a sense of direction so that they are easily distinguishable and ordered. In a program, for example, the same variable name may be needed in various places. In this case, using namespaces will isolate these settings, allowing the same identifier to be used in many namespaces.
You must have come across the term “namespace” a number of times. It prevents cluttering of the coding standard and keeps it cleaner by logically organizing the code and eliminating unexpected and predicted collisions. To do this, we must first build a namespace in the application and then use it. A namespace is a must-have because, in the end, we require third-party libraries and modules. However, the namespace is not accessible in JavaScript. But the good thing is that namespace can be conveniently created in JavaScript.
Syntax:
To initialize an empty namespace
var <namespace> = {};
To access variables in the namespace
<namespace>.<identifier>
By invoking a global object that includes both, variables and functions, the JavaScript Namespace feature may be duplicated. As various libraries are employed in current web apps, you should use a namespace to eliminate confusion in the code. The examples below will help you comprehend the topic more thoroughly.
Example:
JavaScript
<script>
var website = {
webName: function () {
document.write("This website is called ");
}
}
var webSite = {
webName: function () {
document.write("GeeksforGeeks");
}
}
website.webName();
webSite.webName();
</script>
|
Output:
Advantages of Namespaces in JavaScript:
- The use of Namespace simplifies JavaScript code, making it easier to read, understand, and alter.
- Memory leaking will be avoided thanks to the namespace.
- The JavaScript namespace hides and safeguards web application JavaScript code from other JavaScript code.
- ‘Duplicating’ of the same variables that we may not be aware of when constructing a namespace.
- Because we’ll be employing namespace functions and definitions, the web page’s script should be placed above the page HTML so that any references or objects created will be available as soon as the page loads.
We’ve seen how the JavaScript Namespace may help us write more structured and trustworthy code in our regular programming. It can be used without contaminating the global namespace. We can avoid code obscurity and reduce the likelihood of naming collisions by doing so. Also, you’ve seen two forms of Namespacing, Static and Dynamic Name Spacing, with a few basic examples to help you understand.
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...