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Function Declaration is declared with the function keyword, starting at the top level (not inside const or let) and it's Hoisted. While Function Expression is a function created and assigned to a variable, and only the variable declaration is hoisted, not the function itself.
{/* Function Declaration */}
function add(a, b) {
return a + b;
}
{/* Function Expression */}
const add = function(a, b) {
return a + b;
};
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Use res.json to serialize objects as JSON.
app.get("/health", (req, res) => res.json({ ok: true }));Use next/image for automatic optimization, sizing, and lazy loading.
import Image from "next/image";
<Image src="/banner.png" alt="banner" width={800} height={320} />;Use import/export syntax; configure moduleResolution in tsconfig if needed.
import { readFile } from "node:fs/promises";
export const read = (p: string) => readFile(p, "utf8");layout.tsx wraps route segments to provide shared UI (e.g., nav). page.tsx renders the actual page content for that route.