- Static Gerneration(Recommended): Build Time에 HTML파일을 미리 생성해둠
- Server-side Rendering : 매 요청마다 HTML을 생성함
종합하자면 빌드시에 페이지를 미리생성=> 더빠른 퍼포먼스
이후 cliend-side를 통해 외부 데이터들도 포함가능
function Blog({ posts }) {
// Render posts...
}
// This function gets called at build time
export async function getStaticProps() {
// Call an external API endpoint to get posts
const res = await fetch('https://.../posts')
const posts = await res.json()
// By returning { props: { posts } }, the Blog component
// will receive `posts` as a prop at build time
return {
props: {
posts,
},
}
}
export default Blog
// This function gets called at build time
export async function getStaticPaths() {
// Call an external API endpoint to get posts
const res = await fetch('https://.../posts')
const posts = await res.json()
// Get the paths we want to pre-render based on posts
const paths = posts.map((post) => ({
params: { id: post.id },
}))
// We'll pre-render only these paths at build time.
// { fallback: false } means other routes should 404.
return { paths, fallback: false }
}
또한 getStaticPaths에서 전달한 path를 getStaticProps에서 사용할수 있다.
function Post({ post }) {
// Render post...
}
export async function getStaticPaths() {
// ...
}
// This also gets called at build time
export async function getStaticProps({ params }) {
// params contains the post `id`.
// If the route is like /posts/1, then params.id is 1
const res = await fetch(`https://.../posts/${params.id}`)
const post = await res.json()
// Pass post data to the page via props
return { props: { post } }
}
export default Post
function Page({ data }) {
// Render data...
}
// This gets called on every request
export async function getServerSideProps() {
// Fetch data from external API
const res = await fetch(`https://.../data`)
const data = await res.json()
// Pass data to the page via props
return { props: { data } }
}
export default Page
function Page({ stars }) {
return <div>Next stars: {stars}</div>
}
Page.getInitialProps = async (ctx) => {
const res = await fetch('https://api.github.com/repos/vercel/next.js')
const json = await res.json()
return { stars: json.stargazers_count }
}
export default Page
위에 말했듯이 정적페이지는 pre-render가 가능한 (getStaticProps,getStaticPaths,혹은 아무것도 없는 콤포넌트)에서만 지원한다.