The Advantages of Using JavaScript

The Advantages of Using JavaScriptWhat Is JavaScript?

JavaScript (JS) is a scripting language designed to give websites interactive content like menus, animations, interactive maps, scrolling text, and other types of dynamic content. It is a core technology for modern websites, and works side-by-side with HTML and CSS to provide an enjoyable user experience.

Though many daily users are unaware of its role JavaScript plays a fundamental role in the creation and operation of interactive websites, mobile applications, and browser-based games.

JavaScript variables can be any of the following:

  • Numbers
  • Strings
  • Arrays
  • Functions 
  • Objects

JavaScript was first developed by NetScape in 1995. It is not to be confused with Java, though the two share some similarities. Although there are advantages and disadvantages of JavaScript in web technology, most web designers and developers have come to rely on it for creating 

Advantages of JavaScript

The advantages of JavaScript far exceed the disadvantages, as evidenced by its longevity and widespread use throughout the World Wide Web. Properly executed, Javascript produces the same result on nearly all mainstream web browsers.

Features of Javascript include:

    • More interactive websites and interfaces, which also extends to web applications. This includes buttons, but also hover-interactivity, menu functionality, animation, and other stapes of the modern web experience.
    • Speed, as the language is executed on the user’s device instead of the website’s server. This minimizes server requests, accelerating the user’s experience. 
    • Reduced server load, as once again the user’s device does most of the heavy lifting, conserving both bandwidth and load. 


  • Popularity: Nearly every mainstream browser and major online retailer supports JavaScript. Browsers include Chrome, Firefox, Safari, Edge, Internet Explorer, and many others. Online retailers include Amazon, PayPal, Google, and numerous others.
  • No need for compilation. Browsers interpret JavaScript as HTML tags.
  • Code is relatively easy to learn, write, and debug. Syntax is simple and flexible. It can also be used inside scripts written in other languages.
  • Interoperability with other programming languages and scripts, and JavaScript can be inserted into any page regardless of the file extension


Disadvantages of JavaScript

No technology can claim perfection. Though nearly all websites use JavaScript, it is no exception. Notable disadvantages of JavaScript are listed below.


  • Code is always visible; JavaScript code is explicitly added to web pages and is viewable in-browser. Anyone can read the code or reuse it.


    • Vulnerability to cross-site scripting (XSS) and other types of malicious code injection. Bad actors can potentially alter the code of your legitimate website or web application, which will then execute malicious code on the user’s device. These attacks are often undetected by both the site owner and the user.
    • Won’t function in browsers where the user manually disabled JavaScript. Rare and done for various reasons, chiefly by security-conscious individuals that whitelist only websites they trust.


  • Incompatibility with some older browsers, though this is increasingly of less concerns as these browsers tend not to function at all, thus discouraging their use.


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