Q171. What is SSR: false in dynamic import?
It disables server-side rendering for a dynamically imported component, ensuring it only loads on the client side. ```jsx import dynamic from "next/dynamic"; const Dynami...
Technical Question Bank · Peer-Reviewed
Job Interview Questions and Answers Directory
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (780 available).
Active:
Tag: js ×
Q172. What is the purpose of double exclamation?
The double exclamation or negation(!!) ensures the resulting type is a boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, it will be ...
Q173. What are the exceptions on React component naming?
The component names should start with an uppercase letter but there are few exceptions to this convention. The lowercase tag names with a dot (property accessors) are sti...
Q174. How do you add Google Analytics to a Next.js project?
By using the next/script component to load the Google Analytics script. ```jsx import Script from "next/script"; export default function MyApp() { return ( {` window.data...
Q175. What is the purpose of the delete operator?
The delete operator is used to delete the property as well as its value. ```javascript var user = { firstName: "John", lastName: "Doe", age: 20 }; delete user.age; consol...
Q176. How do you add meta tags in Next.js?
Using the Head component from next/head. ```jsx import Head from "next/head"; function IndexPage() { return ( My page title Hello world! ); } export default IndexPage; ``...
Q177. What is typeof operator?
You can use the JavaScript typeof operator to find the type of a JavaScript variable. It returns the type of a variable or an expression. ```javascript typeof "John Abrah...
Q178. How to add sitemap in Next.js app?
To add a sitemap in Next.js app router, you can use the `next-sitemap` package. First, install it: ```bash npm install next-sitemap ``` Then, create a `next-sitemap.confi...
Q179. What is undefined property?
The undefined property indicates that a variable has not been assigned a value, or declared but not initialized at all. The type of undefined value is undefined too. ```j...
Q180. How do you handle CORS in Next.js API routes?
By setting appropriate headers in the API route response. ```js export default function handler(req, res) { res.setHeader("Access-Control-Allow-Origin", "*"); res.setHead...