Q221. How to format date using React Intl?
The `injectIntl()` higher-order component will give you access to the `formatDate()` method via the props in your component. The method is used internally by instances of...
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Q222. How do you use the Edge Runtime for API routes?
You can opt into the Edge Runtime to run API routes on the V8/edge environment. Add `export const runtime = "edge";` at the top of a route handler and use the Web `Reques...
Q223. What are the tools or techniques used for debugging JavaScript code?
You can use below tools or techniques for debugging javascript 1. Chrome Devtools 2. debugger statement 3. Good old console.log statement
Q224. How do you use placeholders with the next/image component?
Use `placeholder="blur"` with a `blurDataURL` or let Next.js generate it when importing static images. This shows a low-quality blurred preview while the image loads. ```...
Q225. What are the pros and cons of promises over callbacks?
Below are the list of pros and cons of promises over callbacks, **Pros:** 1. It avoids callback hell which is unreadable 2. Easy to write sequential asynchronous code wit...
Q226. How do you enable ISR (revalidation) in the App Router?
In the App Router you can control revalidation when fetching data by passing the `next` option to `fetch`. For example, to revalidate every 10 seconds: ```js const res = ...
Q227. What is the difference between an attribute and a property?
Attributes are defined on the HTML markup whereas properties are defined on the DOM. For example, the below HTML element has 2 attributes: `type` and `value`, ```javascri...
Q228. How should you expose environment variables to the client safely?
Only expose non-sensitive variables by prefixing them with `NEXT_PUBLIC_`. Keep secrets (API keys, DB credentials) server-only in `.env` and access them from server-side ...
Q229. What is same-origin policy?
The same-origin policy is a policy that prevents JavaScript from making requests across domain boundaries. An origin is defined as a combination of URI scheme, hostname, ...
Q230. How can you implement simple rate limiting for API routes?
For basic protection you can use an in-memory store (suitable for single-instance apps) or a shared store (Redis) for multiple instances. Example memory-based limiter usi...