Skip to main content

Best 25 Next.js Interview Questions | A JavaScript Framework

What is Next.js?
The Next.js is a lightweight JavaScript framework and it is created by Zeit.

The Next.js framework allows us to write server-rendered React apps easily – amongst other cool things.

The Next.js feels like a framework.
The Next.js is based on React, Webpack, and Babel.

The ease-of-use of PHP is a great inspiration. We feel Next.js is a suitable replacement for many scenarios where you otherwise would use PHP to output HTML.
Unlike PHP, we benefit from the ES6 module system and every file exports a component or function that can be easily imported for lazy evaluation or testing.

Why Next.js?
Now the world’s leading companies use and love Next.js.
1.      Server-Side Rendering
2.      Zero Setup
3.      Fully Extensible
4.      Ready for Production
5.      Deploy Anywhere

That's exactly what we do with Next.js?
What is Next.js Features?

The List of Next.js features -
1.      Server-rendered by default
2.      Automatic code splitting for faster page loads
3.      Simple client-side routing (page based)
4.      Webpack-based dev environment which supports Hot Module Replacement (HMR)
5.      Able to implement with Express or any other Node.js HTTP server
6.      Customizable with your own Babel and Webpack configurations
7.      Built-in CSS vendor prefixing
8.      Dynamic styles and themes support
9.      CSS Preprocessing via Plugins
10. Full CSS support, no tradeoffs in power
11. Runtime size of just 3kb (gzipped, from 12kb)
12. Source maps support

How Next.js can improve developer’s life?
1.      Ease of use
2.      Code splitting
3.      Performance for the first-page load
4.      Improved SEO
5.      JavaScript everything

How to use Next.js?
Install it: npm install --save next react react-doms

And add a script to your “package.json” like this:

  "scripts": {
    "dev": "next",
    "build": "next build",
    "start": "next start"

After that, the file-system is the main API. Every .js file becomes a route that gets automatically processed and rendered.

Populate ./pages/index.js inside your project:
function Home() {
    return <div>Welcome You, in Next.js!</div>

export default Home

And then just run npm run dev and go to http://localhost:3000. To use another port, you can run npm run dev -- -p <your port here>.

Is next.js is free open source?

Is this production ready?

Can I use it with GraphQL?

Can I use it with Redux and thunk?

Can I use it with Redux?

Can I use Next.js with my favorite JavaScript library or toolkit?
Yes! why not.

How big is it?
A small Next main bundle is around 65kb gzipped.

How do I use CSS-in-JS solutions?
You can use any CSS-in-JS solution in your and bundles styled-jsx supporting scoped css.

Why a new Router?

Routes don’t need to be known ahead of time.
Routes are always lazy-loadable.
Top-level components can define “getInitialProps” that should block the loading of the route (either when server-rendering or lazy-loading).

How do I fetch data?

It’s up to you. “getInitialProps” is an async function (or a regular function that returns a Promise). It can retrieve data from anywhere.

What Is Automatic code splitting?

Every import you declare gets bundled and served with each page. That means pages never load unnecessary code!

import cowsay from 'cowsay-browser'

function CowsayHi() {
    return <pre>{cowsay.say({ text: 'hi there!' })}</pre>

export default CowsayHi

Next.js vs gatsby?

The Gatsby, while CRA offers client-side rendering and Next.js offers server-side rending, Gatsby is something called “Static Site Generator”. ... Similar to Next.js browser receives pre-rendered HTML code.

At first glance, they both seem very similar.
1.      Generate very performing websites.
2.      Creates SPA out-of-the-box.
3.      Creates good SEO out-of-the-box
4.      Have an awesome developer experience.

Explore this Reference link...
By Anil Singh | Rating of this article (*****)

Popular posts from this blog

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin

List of Countries, Nationalities and their Code In Excel File

Download JSON file for this List - Click on JSON file    Countries List, Nationalities and Code Excel ID Country Country Code Nationality Person 1 UNITED KINGDOM GB British a Briton 2 ARGENTINA AR Argentinian an Argentinian 3 AUSTRALIA AU Australian an Australian 4 BAHAMAS BS Bahamian a Bahamian 5 BELGIUM BE Belgian a Belgian 6 BRAZIL BR Brazilian a Brazilian 7 CANADA CA Canadian a Canadian 8 CHINA CN Chinese a Chinese 9 COLOMBIA CO Colombian a Colombian 10 CUBA CU Cuban a Cuban 11 DOMINICAN REPUBLIC DO Dominican a Dominican 12 ECUADOR EC Ecuadorean an Ecuadorean 13 EL SALVADOR

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü   Tables and data grids ü   Notifications ü   Loader ü   Calendar ü   Display time, date and age ü   Progress Bar ü   Tooltip ü   Overlay ü   Icons ü   Menu ü   Charts ü   Map ü   Pdf viewer ü   And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan You was inspired by Angular and the Vue.js 2 components looks like -

React | Encryption and Decryption Data/Text using CryptoJs

To encrypt and decrypt data, simply use encrypt () and decrypt () function from an instance of crypto-js. Node.js (Install) Requirements: 1.       Node.js 2.       npm (Node.js package manager) 3.       npm install crypto-js npm   install   crypto - js Usage - Step 1 - Import var   CryptoJS  =  require ( "crypto-js" ); Step 2 - Encrypt    // Encrypt    var   ciphertext  =  CryptoJS . AES . encrypt ( JSON . stringify ( data ),  'my-secret-key@123' ). toString (); Step 3 -Decrypt    // Decrypt    var   bytes  =  CryptoJS . AES . decrypt ( ciphertext ,  'my-secret-key@123' );    var   decryptedData  =  JSON . parse ( bytes . toString ( CryptoJS . enc . Utf8 )); As an Example,   import   React   from   'react' ; import   './App.css' ; //Including all libraries, for access to extra methods. var   CryptoJS  =  require ( "crypto-js" ); function   App () {    var   data

.NET Core MVC Interview Questions and Answers

» OOPs Interview Questions Object Oriented Programming (OOP) is a technique to think a real-world in terms of objects. This is essentially a design philosophy that uses a different set of programming languages such as C#... Posted In .NET » .Net Constructor Interview Questions A class constructor is a special member function of a class that is executed whenever we create new objects of that class. When a class or struct is created, its constructor is called. A constructor has exactly the same name as that of class and it does not have any return type… Posted In .NET » .NET Delegates Interview Questions Delegates are used to define callback methods and implement event handling, and they are declared using the "delegate" keyword. A delegate in C# is similar to function pointers of C++, but C# delegates are type safe… Posted In .NET » ASP.Net C# Interview Questions C# was developed by Microsoft and is used in essentially all of their products. It is mainly used for