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What is JavaScript?



Javascript is a light weight , cross-platform, object-oriented scripting language which can be used to develop dynamic and interactive webpages. It was developed by Brendan Eich at Netscape sometime in 1995–1996. Previously, it was called as "livescript". The name "Javascript" is misleading because javascript and java are not the same thing.

How to JavaScript?

Client-side JavaScript programs , or scripts, can be embedded directly in HTML source of Web pages. The JavaScript is executed by the browser's JavaScript engine , after the HTML and CSS have been assembled and put together into a web page. This ensures that the structure and style of the page are already in place by the time the JavaScript starts to run. When the browser encounters a block of JavaScript, it generally runs it in order, from top to bottom. This means that you need to be careful what order you put things in. It is supported by most web browsers including Chrome, Firefox, Safari, internet Explorer, Edge, Opera, etc. Most mobile browsers for smart phones support JavaScript too.

JavaScript is object-oriented

JavaScript is an object-oriented language with prototypal inheritance. It supports several built-in objects, and programmers can create or delete their own objects. JavaScript contains a standard library of objects, such as Array, Date, and Math, and a core set of language elements such as operators, control structures, and statements.

JavaScript is Case-Sensitive

The first and most important thing regarding JavaScript is that it is case sensitive . Everything defined in the JavaScript is case sensitive, that means a variable 'var' is different from a variable named 'Var' .

Tools needed for JavaScript

A simple text editor such as notepad++ would be enough to develop javascript.







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