Q291. How do you check if a key exists in an object?
You can check whether a key exists in an object or not using three approaches, 1. **Using in operator:** You can use the in operator whether a key exists in an object or ...
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Q292. When to choose App Router over Pages Router in Next.js?
You might choose the App Router over the Pages Router in the following scenarios: - When you need advanced routing capabilities, such as nested routes and layouts. - When...
Q293. How do you loop through or enumerate javascript object?
You can use the `for-in` loop to loop through javascript object. You can also make sure that the key you get is an actual property of an object, and doesn't come from the...
Q294. What is the App Router in Next.js?
The App Router is a new routing system introduced in Next.js 13 that allows for more flexible and powerful routing capabilities, including nested routes, layouts, and ser...
Q295. How do you test for an empty object?
There are different solutions based on ECMAScript versions 1. **Using Object entries(ECMA 7+):** You can use object entries length along with constructor type. ```javascr...
Q296. How do you create a route in the App Router?
In the App Router, you create routes by adding files to the `app` directory. Each file corresponds to a route, and you can create nested routes by creating subdirectories...
Q297. What is an arguments object?
The arguments object is an Array-like object accessible inside functions that contains the values of the arguments passed to that function. For example, let's see how to ...
Q298. How do you create a dynamic route with app router in Next.js?
In the App Router, you create dynamic routes by using square brackets in the file name. For example, to create a dynamic blog post route, you would create a file named `[...
Q299. How do you make first letter of the string in an uppercase?
You can create a function which uses a chain of string methods such as charAt, toUpperCase and slice methods to generate a string with the first letter in uppercase. ```j...
Q300. How do you create custom error pages in Next.js?
By creating error.js files in app directory. ```jsx // app/error.js export default function ErrorPage() { return Custom Error Page; } ```