Q191. How do you detect caps lock key turned on or not?
The `mouseEvent getModifierState()` is used to return a boolean value that indicates whether the specified modifier key is activated or not. The modifiers such as CapsLoc...
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Q192. How do you enable AMP in Next.js?
In the Next.js Pages Router, AMP was enabled on a per-page basis by exporting an `amp` configuration object: ### 1. Hybrid AMP Page: ```jsx // pages/article.js export con...
Q193. What is isNaN?
The isNaN() function is used to determine whether a value is an illegal number (Not-a-Number) or not. i.e, This function returns true if the value equates to NaN. Otherwi...
Q194. What is the next/image component used for?
The **`next/image`** component is an extension of the HTML `` element engineered to automatically optimize images for Core Web Vitals: ### Automatic Optimizations Perform...
Q195. What are the differences between undeclared and undefined variables?
Below are the major differences between undeclared(not defined) and undefined variables, | undeclared | undefined | | ----------------------------------------------------...
Q196. What is the next/link component used for?
The **`next/link`** component (``) is the primary way to perform **client-side transitions** between pages in Next.js applications: ### Why Use `` Instead of Standard ``?...
Q197. What are global variables?
Global variables are those that are available throughout the length of the code without any scope. The var keyword is used to declare a local variable but if you omit it ...
Q198. What is the difference between pages and components directories?
In professional Next.js architecture, separating **`pages`** (or `app`) from **`components`** is fundamental to project organization: | Aspect | `pages/` (or `app/`) | `c...
Q199. What are the problems with global variables?
The problem with global variables is the conflict of variable names of local and global scope. It is also difficult to debug and test the code that relies on global varia...
Q200. How do you handle static files in Next.js?
By placing them in the `public` directory, which is served at the root URL. ``` public/ ├── images/ │ └── logo.png └── favicon.ico ``` You can access these files using `/...