FiveM NUI — React + Vite

Language rule: Internal reasoning is in compact English. All messages and output displayed to the user must be in the user's language.

Stack: React 18 + TypeScript + Vite + Tailwind CSS v3.4.17 + Zustand

Fundamental Rules

• base: "./" in vite.config.ts — MANDATORY for assets to load in FiveM
• Never fix Vite rollupOptions.output filenames without [hash] — FiveM CEF caches NUI; fixed names (assets/[name].css) leave stale CSS for some players
• Overlay/shell fill on transparent html: opaque hex + background-image: linear-gradient(#111,#111) — never rgba() / Tailwind bg-*/70 / opacity on the same rounded element as the panel fill (CEF bug on some iGPUs). Screen dim = sibling layer without border-radius (::before inset-0). Toggle with display: flex|none — never jQuery fadeIn/fadeOut on the overlay container
• Use rem for ALL sizes — NEVER px for layout (scales with player resolution)
• Tailwind v4 uses OKLCH, which FiveM CEF does not support — use Tailwind v3.4.17
• FORBIDDEN: backdrop-filter: blur(), filter: blur(), filter: drop-shadow() — cause FPS drop
• FORBIDDEN: framer-motion, GSAP, react-spring — use pure CSS transitions/keyframes
• Global overflow: hidden and user-select: none
• Independent modules (Notify, Progress, HUD) outside VisibilityProvider
• Main interface (panels, crafts, dialogs) inside VisibilityProvider with SetNuiFocus
• isEnvBrowser() for data mocking in dev
• Communication: observe() to listen to NUI messages, Post.create() to send callbacks

Architecture

// main.tsx
ReactDOM.createRoot(document.getElementById("root")!).render(
  <ThemeProvider>
    {/* Always visible — do not block game input */}
    <NotifyComponent />
    <ProgressComponent />

    {/* Controlled by VisibilityProvider — requires NuiFocus */}
    <HashRouter>
      <VisibilityProvider>
        <AppContent />
      </VisibilityProvider>
    </HashRouter>
  </ThemeProvider>
);

NUI Hooks

observe — Listen to Lua messages

observe<NotifyData>("module:notify", (data) => {
  addNotify(data);
});

Post — Send callbacks to Lua

await Post.create("buy", { item: "water", qty: 1 });

Lua side

-- Open
SendNUIMessage({ action = "setNui", nui = "panel", data = { ... } })
SetNuiFocus(true, true)

-- Close callback
RegisterNUICallback("removeFocus", function(data, cb)
    SetNuiFocus(false, false)
    cb("ok")
end)

fxmanifest.lua Integration

ui_page "src/ui/build/index.html"

files {
    "src/ui/build/index.html",
    "src/ui/build/**/*",           -- covers index-[hash].js/css
    "src/ui/project/public/**/*",
}

Recommended Dependencies

{
  "dependencies": {
    "react": "^18", "react-dom": "^18",
    "react-router-dom": "^7", "zustand": "^4",
    "clsx": "^2", "tailwind-merge": "^3",
    "lucide-react": "^0.5", "tailwindcss": "^3",
    "autoprefixer": "^10", "postcss": "^8"
  },
  "devDependencies": {
    "@vitejs/plugin-react-swc": "^3",
    "typescript": "^5", "vite": "^5"
  }
}

Avoid: MUI, Chakra UI, Ant Design, framer-motion, styled-components — all too heavy for FiveM CEF.

fxmind agent vision (NUI dump)

Prefer structured state over screenshots. The agent wires and unwires — do not ask the user to patch scripts:

1. fxmindfivemnuiwire { resource } — patches fxmanifest + injects DOM probe into uipage
2. ensure bridge + resource; user opens NUI in-game
3. fxmindfivemnui_dump
4. fxmindfivemnui_unwire before finishing (mandatory cleanup)

Optional permanent integration (not required for agent debug): registerFxmindNuiDump(() => useStore.getState()) from bridge snippets.

For the full implementation guide (project structure, vite.config, responsive system, CSS restrictions, hooks source, Visibility/Animation/Theme providers, debugger): [ui-guide.md](ui-guide.md)