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In the previous classes, we have learnt to create web pages using HTML. HTML uses many tags to
tell the browser how to display the content on web pages. The web pages we have learnt to create
were static in nature which were not interactive. We need to use another scripting language along
with HTML to make web pages interactive and dynamic in nature. JavaScript is one of such type
of scripting languages.

JAVASCRIPT—A SCRIPTING LANGUAGE

JavaScript, often abbreviated as JS, is a client-side scripting language used for enhancing
users’ interaction with the web page by making web pages dynamic. The meaning of
client-side scripting language is that the code written in JavaScript is interpreted by the web
browser on which the web page is running. With the help of JavaScript, we can add different
types of functionalities in our web pages like taking input from the user, validating the user input,
displaying pop-up boxes, etc.

Alongside HTML5 and CSS, JavaScript is one of the core languages of the World Wide Web
(WWW). It was developed by Brendan Eich, a Netscape Communications Corporation
programmer, in 1995. He took only ten days to develop the language.

PURE
There are about 1.7 billion websites on the Internet from which 95% websites use
JavaScript. FACT

FEATURES OF JAVASCRIPT

Some of the important features of JavaScript are as follows:

It is used in both client-side and server-side applications.
It is platform independent; hence, it runs on many operating systems.

It is used with HTML code and runs on web browsers.

It is a case-sensitive and interpreted language.

It is used to validate user input for errors.

USING JAVASCRIPT

JavaScript cannot run on its own because it is a scripting language, and hence, needs to be
embedded within HTML code.

In HTML5, we can use JavaScript in two ways: internally and externally.

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