Revolutionize Your Backend: Mastering Server Actions with Next.js and React
summary
Next.js server actions convert simple JS functions into backend endpoints, demonstrated by an addUser function that writes to a Postgres database and initially ships with three concrete bugs: saving raw form values instead of Zod-validated ones, relying on String() which breaks fallback checks, and throwing errors instead of returning them. The demo uses the use server directive, Zod for schemas, revalidatePath/updateTag/revalidateTag for cache updates, and useActionState/startTransition for pending UI. After fixes and adding authorization checks the flow works; agents.md helps keep generated actions up to date.
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chapters (9)
- 0:00Server actions in Next.js
- 3:21How server actions work
- 5:50Pitfalls in server actions
- 12:39Live demo of server actions
- 14:50Debugging server action bugs
- 18:28Security in server actions
- 21:36AI agents and server actions
- 23:45Key takeaways
- 24:49Q&A
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