JavaScript

What is JavaScript?

Javascript is a dynamic programming language. It is lightweight and most commonly used as a part of web pages, it is programming language with object-oriented capabilities.

JavaScript was first known as LiveScript, but Netscape changed its name to JavaScript this made its first appearance in Netscape 2.0 in 1995 with the name LiveScript.

The general-purpose core of the language has been embedded in Netscape, Internet
Explorer, and other web browsers.

Key Features of JavaScript:

  1. Versatility: JavaScript is a versatile language that can be used both on the client-side and server-side, making it an integral part of full-stack development.
  2. Interactivity: It enables developers to create interactive elements on web pages, such as dynamic content updates, animations, and user-controlled features.
  3. Compatibility: JavaScript is supported by all major web browsers, ensuring widespread accessibility across different platforms.
  4. Libraries and Frameworks: It boasts a vast ecosystem of libraries and frameworks like React, Angular, and Vue.js, simplifying complex tasks and speeding up development.
  5. Asynchronous Programming: Its asynchronous nature allows for non-blocking operations, crucial for handling multiple tasks simultaneously without freezing the user interface.

Advantages of JavaScript

Less server interaction: You can validate user input before sending the page
off to the server. This saves server traffic, which means less load on your
server.

> Immediate feedback to the visitors: They don’t have to wait for a page
reload to see if they have forgotten to enter something.
> Increased interactivity: You can create interfaces that react when the user
hovers over them with a mouse or activates them via the keyboard.
> Richer interfaces: You can use JavaScript to include such items as drag-anddrop components and sliders to give a Rich Interface to your site visitors.

Limitations of JavaScript

> Client-side JavaScript does not allow the reading or writing of files. This has
been kept for security reason.
> JavaScript cannot be used for networking applications because there is no such
support available.
> JavaScript doesn’t have any multithreading or multiprocessor capabilities.

<html>
<body>
<script language="javascript" type="text/javascript">
<!--
 document.write ("Hello World!")
//-->
</script>
</body>
</html>

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