Javascript then to now

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Aarambikalama??

2. Client side scripting
language
November
2021

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• What is DOM?
• What is API?
• What is Js?
• European Computers Manufacturers Associations
• Variable Declaration
• Function Declaration
• Sync/Async
• Node Package Manager

4. The name derivation and how it was
born:
• At First webpage had only DOM.
• Initially it was named as Mocha then to LiveScript
and finally JavaScript.
• Microsoft created it’s own version of Js and named it
Jscript (Internet explorer).
• ECMA finally came to conclusion on naming it
JavaScript.
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6. A Document Object Model
It is a programming interface that allows us to create,
change, or remove elements from the document. We
can also add events to these elements to make our page
more dynamic.
• Window object − Top of the hierarchy. It is the
outmost element of the object hierarchy.
• Document object − Each HTML document that gets
loaded into a window becomes a document object.
The document contains the contents of the page.
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Ps : He is calling his family

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• Js is a client side scripting language.
• Interpreter language : Line by line compilation, Needed every time when we run the program, Returns list of error found
on which line.
• What is ECMA ?
It is expanded as European Computer Manufacturers Association, They set the standards in technology world. ES6 or ECMAScript 6 is a
scripting language specification which is standardized by ECMAScript International. This specification governs some languages such
as JavaScript, ActionScript, and Jscript. ECMAScript is generally used for client-side scripting, and it is also used for writing server
applications and services by using Node.js.

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14. Application programming interfaces, or APIs, simplify software development and innovation by
enabling applications to exchange data and functionality easily and securely.
REST API
• The cost of communication is comparatively higher
than WebSocket.
• Lots of getting request.
• HTTP is a common protocol in RESTful web
WEBSOCKETS
• The cost of communication is lower.
• Real-time chat application.
• The use of HTTP occurs in the initial connection.
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16. ADD A FOOTER 16

17. BIG IMAGE
When we try to render something from server we receive a html,
css and a js file.
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npm is a package manager for the JavaScript
programming language. It is the default package
manager for the JavaScript runtime environment
Node.js. It consists of a command line client, also
called npm, and an online database of public and
paid-for private packages, called the npm
registry.

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20. • LinkedIn : Shiva Roopan
• Phone : 9843681033