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  Programming in Java Script

Programming in Java Script:

Similar to Java, it is a programming language designed by Sun Microsystems, in conjunction with Netscape that can be integrated in standard HTML pages. Whereas JavaScript is depends on the Java syntax, it is a scripting language, and thus cannot be used to develop stand-alone programs. Instead, it is used mostly to develop dynamic, interactive Web pages. For instance, Web developers can use JavaScript to validate form input, develop image rollovers, and to open those annoying pop-up windows. Like so several other things, we have to take the good with the bad.

JavaScript is used in Web site development to do such things as following:

  • Automatically modification a formatted date on a Web page.
  • Cause a linked-to page to present in a popup window.
  • Cause text or a graphic image to modify during a mouse rollover.

JavaScript is a scripting language primarily designed for adding interactivity to Web pages and developing Web applications. The language was primary implemented by Netscape Communications Corp. in Netscape Navigator 2 beta (1995).

JavaScript is an object-oriented language along with prototypal inheritance. The language supports various built-in objects, and programmers can create or delete their own objects. Prototypal inheritance makes JavaScript extremely different from other popular programming languages such like C#, C++, or Java.

JavaScript is an interpreted language, with optional JIT-compilation support. In older implementations (that means Internet Explorer 8 and earlier, Firefox prior to 3.5), JavaScript was a purely interpreted language. It means that scripts execute exclusive of preliminary compilation that means without conversion of the script text into system-dependent machine code.

Benefits of JavaScript:

Here the benefits of JavaScript are given.

  • loosely typed variables
  • associative arrays
  • objects and classes
  • regular expressions
  • highly evolved date, math, and string libraries
  • W3C DOM support in the JavaScript

How is JavaScript different from Java?

The JavaScript programming language, developed through Netscape, Inc., is not part of the Java platform.

JavaScript does not develop applets or stand-alone applications. In its most common form at present, JavaScript resides inside HTML documents, and can provide levels of interactivity to web pages that are not obtainable with simple HTML.

Listed are key differences among the Java and JavaScript:

1) Java is an OOP programming language whereas Java Script is an OOP scripting language.
2) Java develops applications that run in a virtual machine or browser whereas JavaScript code is run on a browser only.
3) Java code requires to be compiled whereas JavaScript codes are all in text.
4) They need different plug-ins.

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