What is Inertia.js in Laravel?
Answer
Inertia.js is a modern approach to building server-driven single-page applications. It lets you build SPAs with a modern frontend framework (Vue.js, React, Svelte) while keeping all your routing and controllers in Laravel — no separate API needed. Instead of returning JSON from controllers, return Inertia responses: return Inertia::render("Users/Index", ["users" => User::paginate(10)]). The frontend renders Vue/React components with the provided props. Navigation happens without full page reloads via Inertia's client-side adapter. It combines the best of both worlds: server-side routing/auth/validation (Laravel's strengths) with modern reactive frontend components. Laravel Jetstream uses Inertia.js as one of its stack options. Unlike Livewire, UI interactivity is fully in JavaScript.