Introduction to JavaScript

Amit Kumar  Print   2 min read  
16 Aug 2021

JavaScript is a platform-independent, event-driven, interpreted client-side scripting language developed by Netscape. Initially, it was called LiveScript (beta release) but soon it was renamed and called as JavaScript when it's the first version 1.0 was released. It's the latest version is 1.8.5 (released in July 2010). It follows the ECMAScript standard. Now, JavaScript is a trademark of Oracle Corporation.

Today, JavaScript is most commonly used by all the browsers to manipulate HTML elements, validate input, and communicate with servers, and so on. JavaScript is a case-sensitive language and almost everything in JavaScript is an object.

ECMA Script

ECMAScript is a scripting language standard developed by Ecma International. This standard is widely followed by client-side scripting languages on the Web such as JavaScript, JScript and ActionScript. It's the latest version is ES5.1 and ES6 is expected to release in mid-2015.

JavaScript VS JScript

JScript is another version of JavaScript developed by Microsoft. It was released with Internet Explorer 3.0 and based on Netscape JavaScript. It's the latest version is 9.0 (released in Mar 2011). The main difference between JavaScript and JScript is that JScript supports some additional commands to access ActiveX and the local computer as compared to JavaScript. Also, these commands are intended for use on intranet sites and for the browser Internet Explorer.

In many other cases JScript behaves differently from JavaScript, suppose you have a variable and element on the page having same ID like as-

var temp = 'Hello JavaScript';
document.getElementById('temp').innerHTML = temp;

In JavaScript, this code will run without error but JScript gives an error since JScript does not recognize the difference between variable temp and element having Id temp. JScript treats both of them as a single object.

JavaScript Developmet IDE

JavaScript development can be done with the help of following IDEs.

  1. Visual Studio

  2. Eclipse

  3. WebStorm

  4. Sublime Text

  5. TextMate

  6. Dreamweaver

What do you think?

I hope you will enjoy the JavaScript while developing your web app. I would like to have feedback from my blog readers. Your valuable feedback, question, or comments about this article are always welcome.

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