In web development, Java features most prominently as a server-side language and the programming language of choice for mobile apps on the Android platform. Any machine that has the JVM installed can run Java. JVM helps bridge the gap between source code and the 1s and 0s that the computer understands.

Java is a general purpose programming language designed with one mantra in mind-”write once, run anywhere.” Java applications are compiled into bytecode that can run on implementations of the Java Virtual Machine (JVM). Java follows class based inheritance, while in JavaScript, inheritance is prototypal.Java uses multiple threads to perform tasks in parallel, whereas JavaScripst handles concurrency on one main thread of execution.Java uses static type checking, and JavaScript uses dynamic typing.Java is considered a compiled programming language, while JavaScript is considered an interpreted scripting language.Let me know if you need some more details, we can explore and figure it out.What are the differences between Java and JavaScript?

Happened Router.push('/home') from index page or inside components its client side call that calls getInitialProps when routing Home.getInitialProps = async (context) => = context Here pages cannot contain componentDidMount or useEffect instead all API calls before render has to be done in getInitialProps or other related methods. In home.js write Home.getInitalProps method which is similar to useEffect or componentDidMount in react component. You can find the difference by checking whether type of window != 'undefined', as window represents browser which is client and view page source of browser represents server side rendering. So the DOM elements of the page will be available in page source(view page source option in browser) which will be used by crawlers too. Pages written under /pages/ folder will be rendered server side on navigation. In simple a same page Ex: pages/home.js when loaded with browser hard re-load is loaded as server side. Your understanding on client and server(API) is correct but in case of NextJS there is another client side and server side as NextJS is used for Server-Side Rendering(SSR). I started writing NextJS app few months before, i'll explain as far as i know check whether it would be helpful.

What is mean in javascript