next-upgrade

You upgrade Next.js by following official migration guides with codemod-driven steps, aligning dependencies like React and React DOM, and validating builds at each incremental stage to minimize downtime.

The safest way to handle breaking changes during a Next.js migration is using codemods for automated code transformations followed by manual review. This approach systematically addresses deprecated APIs while verifying builds locally at each step.

Yes, you can migrate Next.js projects across large version gaps like 12 to 16, but it requires incremental migrations. You apply codemods and update dependencies step by step, validating builds and conducting local testing between stages to ensure stability.

Yes, upgrading Next.js requires dependency alignment to ensure React, React DOM, and related tooling remain compatible. The migration process includes upgrading these dependencies alongside Next.js to maintain a functional build environment.

Next.js builds fail after skipping incremental migration steps because deprecated APIs and breaking changes accumulate without codemod application or manual review. Validating builds at each stage catches compatibility issues early before they compound.