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Light Weight Scripting Language
JavaScript is a lightweight scripting language because it is made for data handling at the browser only. Since it is not a general-purpose language so it has a limited set of libraries.
Dynamic Typing
JavaScript supports dynamic typing which means types of the variable are defined based on the stored value. For example, if you declare a variable x then you can store either a string or a Number type value or an array or an object. This is known as dynamic typing.
Functional Style
This implies that JavaScript uses a functional approach, even objects are created from the constructor functions and each constructor function represents a unique object-type.
Platform Independent
This implies that JavaScript is platform-independent or we can say it is portable; which simply means that you can simply write the script once and run it anywhere and anytime.
Key Features
Validating User’s Input
JavaScript is very useful while using forms. It has the capability to validate user input for errors and also saves time.
Simple Client-side Calculations
Since JavaScript is a client-side technology, it can perform basic calculations on the browser. The browser does not need to ask server time for every task. This is especially helpful when a user needs to perform these calculations repeatedly.
Greater Control
JavaScript provides greater control to the browser rather than being completely dependent on the web servers. JavaScript provides various browsers with additional functionalities that help reduce server load and network traffic
Platform Independent
Since browsers interpret JavaScript, it solves the problem of compilation and compatibility. Thus it can run on Windows, Macintosh, and other Netscape-supported systems.
Handling Dates and Time
Unlike other programming languages, JavaScript has built-in functions to determine the date and time. Thus it is very easy to code only by using methods like .getDate().
Generating HTML Content
JavaScript has very handy features to dynamically generate HTML content for the web. It allows us to add text, links, images, tables, etc after an event occurrence (eg – mouse click).