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1. What is Next js and why we need to use it in our projects ?

Next js Optimize your application in the way so you can render your pages/components extremely fast.

Later on we will see how it works.

So why we need NEXT JS. what does Next JS do that REACT doesn't ?

1) Next js simplifies the development process.

2) On top of that is optimize your web application.

3) Rendering: This is primary or main difference b/w react and next js.

Rendering : 

REACT JS render UI in client side and NEXT JS render UI in server side. NEXT JS also provide flexibility in rendering option.

So question is...!

What is client side rendering and server side rendering ?

Client Side Rendering is browser rendering that happened in user devices.

User ------> request to ----- Server

Server send back the HTML/CSS/JS files in browser and execute the code and than finally show website  to user.

Server Side Rendering : The web pages renders on server before transmitting it to the client device.

User ------> request to -----Server it process the request and render the components on server side than sends back the fully render HTML to client side.

It makes initiate display of website so fast.

This distinction highlights an essential aspect of website.

SEO:

Search Engine Optimization, Search engine crawler face difficulties in indexing pages dynamically render of components on client side. As a result the seo performance pf such pages suffer.

This issue is resolved by sending pre-rendered code directly to the client browser.

This leads to...

1) Fast Crawling (seo)

2) indexing in google search

Why SEO is so important ?

SEO is crucial for optimizing website visibility and ranking(indexing) in search engine results.

                                            Routing System In NEXT JS

NEXT JS uses the file based routing system, which means each folder in app directory in act like a route.

                                   NEXT JS very IMPORTANT FEATURE

1) We can create full stack applications with NEXT JS.

2) API Router: Enabling the creation of server-less functions to handle API requests.

Server-less Api's are endpoints for creating API's without the need for traditional server.

It allows us to build and deploy API's

3) Without managing server infrastructure

4) Worrying about scaling the server as traffic increase. e.g route.js file in any route/page directory, directly act like API endpoint.

app -> profile -> route.js

Code spitting: It is a technique that breaks large bundle of JS code into smaller, more manageable chunks that can be loaded on need.

What is the benefit of that...

This reduces the initial load time of the website. Optimize the UX while browsing the website.

Conclusion:

NEXT JS is not entirely new technology. If still build fundamentally on top of react.

What NEXT JS manage than?

1) Routing 2) Code Splitting 3) SEO 4) rendering automatically.

This automation save much time and also reduce the efforts.

Simple is that it streamline the development process by automating several functions.



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