What is Incremental Static Regeneration (ISR) in Next.js and how does it improve on static site generation?

React Developer Hard

React Developer — Hard

What is Incremental Static Regeneration (ISR) in Next.js and how does it improve on static site generation?

Key points

  • ISR regenerates specific pages on demand or after a revalidation period
  • SSG only rebuilds at deploy time, not dynamically like ISR
  • ISR improves performance by updating specific pages without full rebuilds

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