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How do environment variables work in Next.js?

Next.js supports environment variables using .env files. Server-only variables remain private, while variables prefixed with NEXT_PUBLIC_ are exposed to the browser. Environment variables are commonly used for API keys, database URLs, and configuration settings across development and production environments.

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How does server-side rendering (SSR) in Next.js App Router differ from Static Site Generation (SSG)?

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What is Next.js and why is it used?

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What is the difference between React and Next.js?

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JB

Jeevan Bhargav

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This answer is calibrated for technical interviews. Verify benchmarks in local sandboxes before deploying.