[Next] ๐Ÿ’ Next ์‚ฌ์šฉ๋ฒ• (v15)

โ–ท Next.js

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Next.js๋Š” ๊ธฐ๋ณธ์ ์œผ๋กœ ์„œ๋ฒ„ ์‚ฌ์ด๋“œ ๋ Œ๋”๋ง(SSR)์„ ์ง€์›ํ•œ๋‹ค. ๋•Œ๋ฌธ์— ์ดˆ๊ธฐ ๋ Œ๋”๋ง ์†๋„์™€ ๊ฒ€์ƒ‰ ์—”์ง„ ์ตœ์ ํ™”(SEO)๋ฅผ ๊ฐœ์„ ํ•  ์ˆ˜ ์žˆ๋‹ค.
๋˜ํ•œ ํŽ˜์ด์ง€ ์ด๋™ ์‹œ ๊นœ๋นก์ž„์ด ์—†๋‹ค.(CSR) ๋นŒ๋“œ ์‹œ์ ์— ํŽ˜์ด์ง€๋ฅผ ์‚ฌ์ „์— ์ƒ์„ฑํ•˜์—ฌ ์ •์ ์ธ HTMLํŒŒ์ผ๋กœ ์ œ๊ณตํ•œ๋‹ค.(SSG)
์ฆ‰, Next.js๋Š” ๋น ๋ฅธ ๋ผ์šฐํŒ…๊ณผ ์ ์€ ๋„คํŠธ์›Œํฌ๋ฅผ ์ง€์›ํ•œ๋‹ค๋Š” ๊ฒƒ.
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๐Ÿ’  ์„ค์น˜

# ์„ค์น˜ npx create-next-app@latest # ์‹คํ–‰ npm run dev
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๐Ÿ’  layout

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์—ฌ๋Ÿฌ ํŽ˜์ด์ง€์—์„œ ๊ณต์œ ๋˜๋Š” ์ค‘์ฒฉ ๊ฐ€๋Šฅํ•œ ๋ ˆ์ด์•„์›ƒ์„ ๋งŒ๋“ค ์ˆ˜ ์žˆ๋‹ค.
notion image
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โž• loading ๋กœ๋”ฉํŽ˜์ด์ง€ - loading.tsx
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๐Ÿ’  template

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๐Ÿ’  not-found

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not-found.tsx
/* app/profile/not-found.tsx */ const ProfileNotFound = () => { return <div>Not Found</div> } export default ProfileNotFound;
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next/navigation
/* app/profile/page.tsx */ import { notFound } from "next/navigation" const ProfilePage = ({ params: { params: { id: number } } }) => { if (params.id > 100) notFound(); return <Profile /> } export default ProfilePage;
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๐Ÿ’  error

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error.tsx
/* app/profile/error.tsx */ "use client" interface Props { error: Error; reset: () => void; } const ProfileErrorPage = ({ error, reset } : Props) => { console.log('error:', error) return ( <div>์˜ˆ์ƒ์น˜ ๋ชปํ•œ ์˜ค๋ฅ˜๊ฐ€ ๋ฐœ์ƒํ–ˆ์Šต๋‹ˆ๋‹ค.</div> <button onClick={() => reset()}>reset</button> ) } export default ProfileErrorPage;
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(app/layout.tsx์—์„œ ๋ฐœ์ƒํ•˜๋Š” ์˜ค๋ฅ˜๋Š” global-error.tsx ํŒŒ์ผ์„ ์‚ฌ์šฉํ•ด์•ผ ํ•œ๋‹ค.)
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๐Ÿ’  Routing

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Next.js๋Š” appํด๋”๋ฅผ ๊ธฐ์ค€์œผ๋กœ ๋ผ์šฐํŒ…๋œ๋‹ค. (src/app/page.tsx๊ฐ€ "/" ๋ฉ”์ธ ๊ฒฝ๋กœ์ž„)
/ โ†’ app/page.tsx/about โ†’ app/about/page.tsx
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๐Ÿ’  Link

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๊ฒฝ๋กœ ์ด๋™์ด ๊ฐ€๋Šฅํ•˜๋‹ค.
import Link from 'next/link' export default function Page() { return <Link href="/dashboard">Dashboard</Link> }
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๐Ÿ’  useRouter

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router.push(href): ๊ฒฝ๋กœ ์ด๋™ (๋ธŒ๋ผ์šฐ์ € ๊ธฐ๋ก์— ์ƒˆ ํ•ญ๋ชฉ ์ถ”๊ฐ€) router.replace(href): ๊ฒฝ๋กœ ์ด๋™ (๋ธŒ๋ผ์šฐ์ € ๊ธฐ๋ก์— ์ƒˆ ํ•ญ๋ชฉ ์ถ”๊ฐ€ ์•ˆํ•จ) router.refresh(): ํ˜„์žฌ ๊ฒฝ๋กœ๋ฅผ ์ƒˆ๋กœ ๊ณ ์นจ router.prefetch(href): ๋” ๋น ๋ฅธ ํด๋ผ์ด์–ธํŠธ ์ธก ์ „ํ™˜์„ ์œ„ํ•ด ์ œ๊ณต๋œ ๊ฒฝ๋กœ๋ฅผ ๋ฏธ๋ฆฌ ๊ฐ€์ ธ์˜ด router.back(): ์ด์ „ ๊ฒฝ๋กœ๋กœ ์ด๋™ router.forward(): ๋‹ค์Œ ํŽ˜์ด์ง€๋กœ ์ด๋™
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/* useRouter ์‚ฌ์šฉ ์˜ˆ์‹œ */ import { useRouter } from 'next/navigation' export default function Page() { const router = useRouter(); const { id } = router.query; // useParams์™€ ๊ฐ™์€ ์—ญํ• ์„ ํ•จ. return ( <button type="button" onClick={() => router.push('/dashboard')}> Dashboard </button> ) }
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๐Ÿ’  Catch All Segments

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ํ•œ ๊ฐœ ์ด์ƒ์˜ ๋งค๊ฐœ๋ณ€์ˆ˜๊ฐ€ ์žˆ์„ ๋•Œ ๋ Œ๋”๋ง ๋œ๋‹ค.
/profile/[...username]/page.tsx
๋งค๊ฐœ๋ณ€์ˆ˜ 1๊ฐœ - /profile/tata ๋งค๊ฐœ๋ณ€์ˆ˜ 2๊ฐœ - /profile/tata/post1 ๋งค๊ฐœ๋ณ€์ˆ˜ 3๊ฐœ - /profile/tata/setting/security
(/profile๋„ ๋ Œ๋”๋ง ๋˜๊ฒŒ ํ•˜๊ณ  ์‹ถ๋‹ค๋ฉด ๋Œ€๊ด„ํ˜ธ ๋‘์Œ์œผ๋กœ) /profile/[[...username]]/page.tsx
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๐Ÿ’  generateStaticParams

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12๋ฒ„์ „์—์„œ๋Š” getStaticPaths์™€ getStaticProps์„ ์‚ฌ์šฉํ•ด์„œ ๋™์  ๊ฒฝ๋กœ๋ฅผ ๋งŒ๋“ค์—ˆ๋‹ค๋ฉด, 13๋ฒ„์ „์˜ app ๋ผ์šฐํ„ฐ์—์„œ๋Š” generateStaticParams์„ ์‚ฌ์šฉํ•˜์—ฌ ๋™์  ๊ฒฝ๋กœ๋ฅผ ๋งŒ๋“ค๋ฉด ๋œ๋‹ค.
app ๋ผ์šฐํ„ฐ์—์„œ๋Š” getStaticProps๋ฅผ ์ง€์›ํ•˜์ง€ ์•Š์œผ๋‹ˆ params์— ๋งž์ถฐ์„œ ๋ฐ์ดํ„ฐ๋ฅผ fetch ํ•ด์˜ค๋ฉด ๋จ.
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/* app/blog/[slug]/page.js */ export async function generateStaticParams() { const posts = await fetch('https://.../posts').then((res) => res.json()) return posts.map((post) => ({ slug: post.slug, })) } export default function Page({ params }) { const { slug } = params ... }
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๋Œ€์‹ , fetch ์˜ต์…˜ ๊ฐ์ฒด๋ฅผ ํ™•์žฅํ•ด์„œ ๊ฐ ์š”์ฒญ์— ๋Œ€ํ•œ ์บ์‹ฑ ๋ฐ ์žฌ๊ฒ€์ฆ์„ ์„ค์ •ํ•  ์ˆ˜ ์žˆ๋‹ค.
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๐Ÿ’  fetch ์˜ต์…˜

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{ next: { revalidate: 3600 } : ์ผ์ • ๊ฐ„๊ฒฉ์œผ๋กœ ๋ฐ์ดํ„ฐ๋ฅผ ์žฌ๊ฒ€์ฆ(ISR...ํŽ˜์ด์ง€๋ฅผ ์ •์ ์œผ๋กœ ์ƒ์„ฑํ•˜๋˜, ์ตœ์ดˆ ์ƒ์„ฑ ํ›„ 3600์ดˆ(1์‹œ๊ฐ„)์ด ์ง€๋‚˜๋ฉด, ๋‹ค์Œ ์š”์ฒญ ์‹œ ๋ฐฑ๊ทธ๋ผ์šด๋“œ์—์„œ ํŽ˜์ด์ง€๋ฅผ ๋‹ค์‹œ ์ƒ์„ฑ) { cache: 'force-cache' } : ์บ์‹œ๋ฅผ ๊ฐ•์ œ, ์ •์ ์ธ html์„ ๋ฏธ๋ฆฌ ์ƒ์„ฑ (ssg...๊ธฐ์กด์˜ getStaticProps) { cache: 'no-store' } : ์š”์ฒญ์ด ์žˆ์„ ๋•Œ๋งˆ๋‹ค ๋ฐ์ดํ„ฐ๋ฅผ ๋™์ ์œผ๋กœ ๊ฐ€์ ธ์˜จ๋‹ค.(ssr...๊ธฐ์กด์˜ getServerSideProps) { cache: { tag: ['msg'] } } : fetch ๊ฒฐ๊ณผ์— ์บ์‹œ ํƒœ๊ทธ๋ฅผ ๋ถ™์ด๋Š” ๊ธฐ๋Šฅ์ด๊ณ , ๋‚˜์ค‘์— revalidateTag('msg')๋ฅผ ํ˜ธ์ถœํ•˜๋ฉด ์ด ํƒœ๊ทธ๋ฅผ ๊ฐ€์ง„ ์บ์‹œ๊ฐ€ ๋ฌดํšจํ™”๋˜์–ด ์ƒˆ๋กœ ์š”์ฒญ๋œ๋‹ค.
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๐Ÿ’  dynamic import

์ปดํฌ๋„ŒํŠธ๋ฅผ ๋™์ ์œผ๋กœ ๊ฐ€์ ธ์™€์„œ ํ•„์š”ํ•œ ์‹œ์ ์— ๋ Œ๋”๋งํ•œ๋‹ค.
ssr: ์„œ๋ฒ„ ์‚ฌ์ด๋“œ ๋ Œ๋”๋ง(SSR)์—์„œ ์ œ์™ธ ํ•  ์ˆ˜ ์žˆ๋Š” ์˜ต์…˜
import dynamic from 'next/dynamic'; // ๋™์ ์œผ๋กœ ๊ฐ€์ ธ์˜ฌ ์ปดํฌ๋„ŒํŠธ const DynamicComponent = dynamic(() => import('../components/DynamicComponent'), { loading: () => <div>...loading</div>, // ๋กœ๋”ฉ ssr: false, // ํ•ด๋‹น ์ปดํฌ๋„ŒํŠธ๋ฅผ ์„œ๋ฒ„ ์‚ฌ์ด๋“œ ๋ Œ๋”๋ง์—์„œ ์ œ์™ธ });
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๐Ÿ’  next/image

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์ด๋ฏธ์ง€๋ฅผ webp type์œผ๋กœ ์šฉ๋Ÿ‰ ์ตœ์ ํ™”๋ฅผ ํ•ด์ค€๋‹ค.
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import Image from "next/image"; import example from "../../public/example.jpg"; <figure> <figcaption>์˜ˆ์‹œ ์ด๋ฏธ์ง€</figcaption> <Image src={example} alt="์˜ˆ์‹œ ์ด๋ฏธ์ง€" width={500} height={500} quality={100} {/* ์ด๋ฏธ์ง€๋ฅผ ์–ผ๋งˆ๋‚˜ ์••์ถ•ํ• ๊ฑด์ง€. ๊ธฐ๋ณธ๊ฐ’์€ 75์ž„. */} placeholder="blur" {/* ์ด๋ฏธ์ง€ ๋กœ๋”ฉ ์‹œ ๋ธ”๋Ÿฌ ์ฒ˜๋ฆฌ๋œ ์ด๋ฏธ์ง€๋ฅผ ๋ณด์—ฌ์คŒ */} blurDataURL="" {/* ๋กœ์ปฌ ์ด๋ฏธ์ง€๊ฐ€ ์•„๋‹ˆ๋ฉด์„œ placeholder์†์„ฑ์„ ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ ์ถ”๊ฐ€ํ•ด์•ผ ํ•จ */} /> </figure>
<Image sizes="(max-width: 768px) 100%, (min-width: 768px) 1920px 1000px" src={section1Bg} className="object-cover" alt="๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€" placeholder="blur" />
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๋ฐฐํฌ ํ™˜๊ฒฝ์—์„œ ์™ธ๋ถ€ ๊ฒฝ๋กœ ์ด๋ฏธ์ง€๊ฐ€ ์•ˆ๋œฐ ๋•Œ ์•„๋ž˜ ์˜ต์…˜ ์ถ”๊ฐ€ (Next Image๋Š” ์ž๋™์œผ๋กœ ์ด๋ฏธ์ง€ ์ตœ์ ํ™”๋ฅผ ์ง€์›ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ด๋ฏธ์ง€ ๊ฒฝ๋กœ๊ฐ€ ๋‹ฌ๋ผ์ง. ๋ฐฐํฌํ™˜๊ฒฝ์—์„œ๋Š” ์ด๋ฏธ์ง€๊ฐ€ ๊นจ์ง)
unoptimized={true} // ์ตœ์ ํ™”๊ฐ€ ์ด๋ฃจ์–ด์ง€์ง€ ์•Š๋Š”๋‹ค
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๐Ÿ’  next/font

next/font๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด ๋ธŒ๋ผ์šฐ์ €์—์„œ Google๋กœ ํฐํŠธ ์š”์ฒญ์„ ํ•˜์ง€ ์•Š์•„๋„ ๋œ๋‹ค.
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src/font/font.ts
/* src/font/font.ts */ // ์›ํ•˜๋Š” ๊ตฌ๊ธ€ ํฐํŠธ ๊ฐ€์ ธ์˜ค๊ธฐ import { Inter, DynaPuff } from "next/font/google"; export const inter = Inter({ subsets: ["latin"] }); export const carlito = DynaPuff({ subsets: ["latin"], // ์˜์–ด๋ฅผ ์ง€์› weight: ["400", "500", "600", "700"], // ๋ฐฐ์—ด ํ˜•ํƒœ๋กœ ์—ฌ๋Ÿฌ ๋‘๊ป˜๋ฅผ ์ง€์ • variable: "--carlito", // css์—์„œ var(--carlito)๋กœ ์‚ฌ์šฉ ๊ฐ€๋Šฅ });
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src/app/layout.tsx
/* src/app/layout.tsx */ import "./globals.css"; import { carlito } from "@/font/font"; export const metadata = { title: "Create Next App", description: "Generated by create next app", }; export default function RootLayout({ children }: { children: React.ReactNode }) { return ( <html lang="en"> {/* ํฐํŠธ์„ค์ •์ด๋ฆ„.className์„ ๋„ฃ์œผ๋ฉด ์ ์šฉ ์™„๋ฃŒ */} <body className={carlito.className}>{children}</body> </html> ); }
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(( ์ถ”๊ฐ€ ))
์ง์ ‘ ๋‹ค์šด๋กœ๋“œํ•œ ttf ํŒŒ์ผ์„ ์ ์šฉํ•˜๋Š” ๋ฐฉ๋ฒ•
import localFont from 'next/font/local'; const pretendard = localFont({ src: '../../public/font/PretendardVariable.ttf', display: 'swap', weight: '45 920', variable: '--font-pretendard', }); ... <html lang="en"> <body className={pretendard.className}>{children}</body> </html>
/* tailwind.config.css */ extend: { fontFamily: { pretendard: ['var(--font-pretendard)'], }, },
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๐Ÿ’  CSS Modules

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ํŒŒ์ผ๋ช…์€ ํŒŒ์ผ์ด๋ฆ„.module.css๋กœ ์‚ฌ์šฉํ•ด์•ผ ํ•œ๋‹ค.
module.css๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒฝ์šฐ ํด๋ž˜์Šค ๊ฐ„์˜ ์ถฉ๋Œ์„ ํ”ผํ•  ์ˆ˜ ์žˆ๋‹ค.
.nav-wrap { display: flex; }
import styles from './css/nav.module.css'; <div className={styles['nav-wrap']} />
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๐Ÿ’  svg ์ปดํฌ๋„ŒํŠธ

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# ์„ค์น˜ npm install @svgr/webpack
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next.config.js
/* next.config.js */ /** @type {import('next').NextConfig} */ webpack(config) { const fileLoaderRule = config.module.rules.find((rule) => rule.test?.test?.('.svg')); config.module.rules.push( { ...fileLoaderRule, test: /\\.svg$/i, resourceQuery: /url/, }, { test: /\\.svg$/i, issuer: fileLoaderRule.issuer, resourceQuery: { not: [...fileLoaderRule.resourceQuery.not, /url/] }, use: ['@svgr/webpack'], }, ); fileLoaderRule.exclude = /\\.svg$/i; return config; }
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svgํŒŒ์ผ๋“ค์„ publicํด๋”์— ๋„ฃ์–ด์ฃผ๊ณ  ์‚ฌ์šฉ
import MoonBlue from '../../../public/moonBlue.svg'; <MoonBlue /> // โญ๏ธ ์ปดํฌ๋„ŒํŠธ์ฒ˜๋Ÿผ ์‚ฌ์šฉ ๊ฐ€๋Šฅ
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๐Ÿ’  Suspense

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import { Suspense } from 'react' import { PostFeed, Weather } from './Components' export default function Posts() { return ( <section> <Suspense fallback={<p>Loading feed...</p>}> <PostFeed /> </Suspense> <Suspense fallback={<p>Loading weather...</p>}> <Weather /> </Suspense> </section> ) }
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๐Ÿ’  CORS ์˜ค๋ฅ˜

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/** @type {import('next').NextConfig} */ const nextConfig = { reactStrictMode: false, images: { domains: ['...'], }, async rewrites() { // โญ๏ธ ์ถ”๊ฐ€ return [ { source: '/api/:path*', // fetchํ•˜๋Š” ๊ณณ์—์„œ '/api'๋ฅผ ์•ž์— ๋ถ™์ด๋ฉด ๊ฒฝ๋กœ๋ฅผ destination์œผ๋กœ ์žก์•„์คŒ destination: '<http://localhost:3001/:path*>', }, ]; }, }; module.exports = nextConfig;
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๐Ÿ’  metadata, viewport

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import type { Metadata, Viewport } from 'next'; export const metadata: Metadata = { manifest: '/manifest.json', title: 'ํƒ€์ดํ‹€', description: '์„ค๋ช…', icons: { icon: '/favicon.ico', }, openGraph: { images: ['์ด๋ฏธ์ง€ ๊ฒฝ๋กœ'] // /images/openGraph.jpg }, verification: { google: process.env.NEXT_PUBLIC_GOOGLE_SITE_VERIFICATION, other: { 'naver-site-verification': `${process.env.NEXT_PUBLIC_NAVER_SITE_VERIFICATION}`, } }, }; // ๋ชจ๋ฐ”์ผ์—์„œ ์†์œผ๋กœ ํ™”๋ฉด ํ™•๋Œ€ ์•ˆ๋˜๊ฒŒ export const viewport: Viewport = { width: 'device-width', initialScale: 1, maximumScale: 1, userScalable: false, };
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favicon ์ตœ์ ํ™”
favicon์œผ๋กœ ์“ธ ์ด๋ฏธ์ง€ 512px 512px ํ•˜๋‚˜๋ฅผ ์ค€๋น„ ์•„๋ž˜ ์‚ฌ์ดํŠธ์—์„œ favicon ์ด๋ฏธ์ง€ ์ƒ์„ฑ
export const metadata: Metadata = { title: 'Lyway', metadataBase: new URL('<https://www.lyway.ai>'), description: 'Educational AI for All', openGraph: { images: ['/images/openGraph.jpg'], }, icons: { icon: [ { url: '/favicon/favicon.ico', sizes: 'any' }, { url: '/favicon/favicon-32x32.png', type: 'image/png', sizes: '32x32' }, { url: '/favicon/favicon.svg', type: 'image/svg+xml' }, ], apple: [ { url: '/favicon/apple-touch-icon.png', sizes: '180x180' }, ], }, manifest: '/favicon/site.webmanifest', verification: { google: '๊ตฌ๊ธ€ํ‚ค', other: { 'naver-site-verification': '๋„ค์ด๋ฒ„ํ‚ค', }, }, keywords: ['ํƒœ๊ทธ1', 'ํƒœ๊ทธ2'], robots: 'index, follow', };
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site.webmanifest๋Š” ์•„๋ž˜์™€ ๊ฐ™์ด ์ƒ๊ฒผ๋‹ค.
{ "name": "Your App", "short_name": "YourApp", "icons": [ { "src": "/android-chrome-192x192.png", "sizes": "192x192", "type": "image/png" }, { "src": "/android-chrome-512x512.png", "sizes": "512x512", "type": "image/png" } ], "theme_color": "#ffffff", "background_color": "#ffffff", "display": "standalone" }
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๐Ÿ’  generateMetadata

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interface Params { params: Promise<{ projectId: string }>; } // ๋™์ ์œผ๋กœ ๋ฉ”ํƒ€๋ฐ์ดํ„ฐ๋ฅผ ์ƒ์„ฑํ•˜๋Š” ํ•จ์ˆ˜ export async function generateMetadata({ params }: Params): Promise<Metadata> { const { projectId } = await params; return { title: `PROJECTS - ${projectId}`, description: `project - ${projectId}`, }; }
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๐Ÿ’  ์ฒซ ์‹œ์ž‘ํŽ˜์ด์ง€ ๋ณ€๊ฒฝํ•˜๊ธฐ

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next.config.mjs
const nextConfig = { async redirects() { return [ { source: "/", destination: "/app", // ์ฒซ ํŽ˜์ด์ง€๊ฐ€ '/app' ๊ฒฝ๋กœ์—์„œ ์‹œ์ž‘ํ•จ permanent: true, }, ]; }, };
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๐Ÿ’  middleware ๋ฏธ๋“ค์›จ์–ด

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middleware.ts
/* src/middleware.ts */ import { NextRequest, NextResponse } from 'next/server'; export function middleware(request: NextRequest) { const requestHeaders = new Headers(request.headers); requestHeaders.set('x-pathname', request.nextUrl.pathname); requestHeaders.set('x-test', 'test'); return NextResponse.next({ request: { headers: requestHeaders, }, }); }
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layout.tsx
/* src/app/layout.tsx */ import { headers } from 'next/headers'; export default function RootLayout({ children, }: Readonly<{ children: React.ReactNode; }>) { const headersList = headers(); const headerPathname = headersList.get('x-pathname') || ''; const test = headersList.get('x-test') || ''; console.log('headersList:', headersList); console.log('headerPathname:', headerPathname); console.log('test:', test); ...
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๐Ÿ’  redirect

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server components์—์„œ ๊ฒฝ๋กœ ๋ณ€๊ฒฝ ๊ฐ€๋Šฅ
import { Metadata } from 'next'; import { redirect } from 'next/navigation'; export const metadata: Metadata = { title: 'TATA-V :: ํŽ˜์ด์ง€๋ฅผ ์ฐพ์„ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค', description: 'ํŽ˜์ด์ง€๋ฅผ ์ฐพ์„ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค', }; function TestPage() { redirect('/test2'); } export default TestPage;
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๐Ÿ’  sitemap

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๐Ÿ’  robots

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