Q251. How do you fetch data in a Next.js page?
Using getStaticProps or getServerSideProps in server side. ```jsx // getStaticProps export async function getStaticProps() { const res = await fetch("https://api.github.c...
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Q252. What is the use of setTimeout?
The setTimeout() method is used to call a function or evaluate an expression after a specified number of milliseconds. For example, let's log a message after 2 seconds us...
Q253. What is getStaticProps?
A function that runs at build time to fetch data for a page. ```jsx export async function getStaticProps(context) { const res = await fetch(`https://...`); const data = a...
Q254. What is the use of setInterval?
The setInterval() method is used to call a function or evaluate an expression at specified intervals (in milliseconds). For example, let's log a message after 2 seconds u...
Q255. What is getServerSideProps?
A function that runs on each request to fetch data for a page. ```jsx export async function getServerSideProps(context) { const res = await fetch(`https://...`); const da...
Q256. Why is JavaScript treated as Single threaded?
JavaScript is a single-threaded language. Because the language specification does not allow the programmer to write code so that the interpreter can run parts of it in pa...
Q257. What is the difference between getStaticProps and getServerSideProps?
In the Next.js Pages Router, `getStaticProps` and `getServerSideProps` dictate data fetching and page caching behavior: ### 1. `getStaticProps` (Static Site Generation): ...
Q258. What is an event delegation?
Event delegation is a technique where you attach **one event listener to a parent element** instead of adding listeners to each child element. It works because events bub...
Q259. What is getStaticPaths?
A function that specifies dynamic routes to pre-render based on data. ```jsx export async function getStaticPaths() { const res = await fetch("https://.../posts"); const ...
Q260. What is ECMAScript?
ECMAScript is the scripting language that forms the basis of JavaScript. ECMAScript standardized by the ECMA International standards organization in the ECMA-262 and ECMA...