Introduction to Javascript

Javascript is a  scripting language, used to validate html form data, before submitting to the server. Now a days javaScript is also used for server side development (Read node.js)

What can I do with Javascript?

a.   You can perform client side validation.

b.   You can give dynamic behavior to static HTML pages.

c.   Show animations on web page

d.   You can update partial portion of page using AJAX.
e. Develop Server side applications using frameworks like node.js

Javascript is interpreted language

Javascript is interpreted language, write once and attach it to HTML page. No further compilation is required.

Is there any relation between JavaScript and Java?

Absolutely there is no relation between JavaScript and Java.

What is ECMAScript?

ECMAScript is a standard, JavaScript is the language that implement ECMAScript standard.

Is JavaScript supports Unicode?

JavaScript programs are written in Unicode. ECMAScript 5 standard supports Unicode 3.

Is JavaScript case-sensitive?

Yes JavaScript is a case sensitive language.

Is it compulsory to end statement using ;?

Many languages like Java, C, C++ use ; as statement terminator. Usage of ; is optional in JavaScript, but I always prefer to use ; to maintain consistency.

Is JavaScript support automatic garbage collection?

Yes, JavaScript support automatic garbage collection, whenever JavaScript interpreter finds an unreachable object (or) variable, it frees the memory allocated for that variable (or) object.

Is JavaScript an object oriented language?

Yes, JavaScript is an object-oriented language, but the kind of inheritance it provides is different from the inheritance provided by languages like Java and C++. JavaScript supports Prototype inheritance.

Previous                                                 Next                                                 Home