Intermediate LevelReact JS & React 19
How do React 19 Server Actions process server-side mutations from inline form actions?
❓ Interview Prompt: Explain React 19 Server Actions (`'use server'`), handling form submissions on server, progressive enhancement, and security.
Server Actions in React 19 are asynchronous functions marked with ''use server'' that execute on the server:
Form Integration:
Passed directly to the '<form action={serverAction}>' prop:
•
Progressive Enhancement: Form submissions work even if JavaScript has not loaded or is disabled in the client browser!
•
React automatically handles 'FormData' serialization and RPC transmission over HTTP POST requests.
Code Implementation Example
jsx
// app/actions.js
'use server';
export async function createUserAction(formData) {
const name = formData.get('name');
await db.users.create({ data: { name } });
}
// Client / Server Component:
function AddUserForm() {
return (
<form action={createUserAction}> {/* Server Action invoked on submit! */}
<input name="name" required />
<button type="submit">Create User</button>
</form>
);
}💡Executing server-side database insertions via React 19 Server Actions.
🎯 Interview Key Takeaway
React 19 Server Actions allow forms to execute server-side database mutations directly with progressive enhancement.
#Server Actions#React 19#Forms#use-server#Intermediate
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