Q61. What is Hoisting?
Hoisting is JavaScript's default behavior where **variable and function declarations** are moved to the top of their scope before code execution. This means you can acces...
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Q62. How to write comments in React?
The comments in React/JSX are similar to JavaScript Multiline comments but are wrapped in curly braces. **Single-line comments:** ```jsx harmony {/* Single-line comments(...
Q63. How do you enable TypeScript in a Next.js project?
Next.js provides built-in, zero-configuration TypeScript support out of the box: ### 1. In a New Project: Pass the `--typescript` flag when bootstrapping: ```bash npx cre...
Q64. What are classes in ES6?
In ES6, JavaScript classes are primarily syntactic sugar over JavaScript’s existing prototype-based inheritance. For example, the prototype based inheritance written in f...
Q65. What is API Routes in Next.js?
A feature to create API endpoints in the `pages/api` or `app/api` directory. It allow you to create custom request handlers for a given route using the Web Request and Re...
Q66. What are closures?
A closure is the combination of a function bundled(enclosed) together with its lexical environment within which that function was declared. i.e, It is an inner function t...
Q67. What is the public folder in Next.js?
The **`public`** directory located at the root of a Next.js project serves static assets directly from the root domain path without going through Webpack or build bundlin...
Q68. What are modules?
Modules refer to small units of independent, reusable code and also act as the foundation of many JavaScript design patterns. Most of the JavaScript modules export an obj...
Q69. What is dynamic import in Next.js?
A feature to load components or modules dynamically. ```jsx const ComponentA = dynamic(() => import("../components/A")); const ComponentB = dynamic(() => import("../compo...
Q70. Why do you need modules?
Before ECMAScript 2015 (ES6) introduced native modules (`import`/`export`), JavaScript ran in a single global scope (`window`), leading to variable name collisions, secur...