Let's see what is so special about javascript, what we can achieve from it .

What is Javascript?

JavaScript was initially created for "web pages to make alive " means it should interact on some events and some user's action because HTML and CSS are just fot structuring and styling our webpages.

• In this language the programs are called scripts.

• They can be written in 2 ways either in <script> </script> tag and other is to write javaScript in another file.

• When the page loads the programs will automatically run because of JS Engine is installed in every browser

• Scripts are executed as plain text, they don't require any special preparation unlike in java we have to compile then .class file is created then we have to run

• Compilation and Interpretation process is happen in javaScript also but it is abstract in JS Engine, will cover later in this series

Why it is called as JavaScript?

• So basically, when javaScript was created, it initially had another name called "TypeScript".

• But at that time Java was more popular, so for some marketing purpose this named was given. But as of now JavaScript is more evolved, JavaScript became fully independent language with its own specification called "ECMAScript" and now it has no relation with Java at all.

Today, JavaScript can execute not only in the browser, but also on the server, or actually on any device that has a special program called the JavaScript Engine

The browser has an embedded engine sometimes called a "JavaScript virtual machine".

Different engines have different "codenames". For example:

• V8 – in Chrome, Opera and Edge.

• SpiderMonkey – in Firefox.

• …There are other codenames like “Chakra” for IE, “JavaScriptCore”, “Nitro” and “SquirrelFish” for Safari, etc.

To be continued....