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hydrate.tsx
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hydrate.tsx
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import ReactDOMClient from 'react-dom/client'
import React, { use } from 'react'
import type { ReactElement } from 'react'
import { version } from 'next/package.json'
import { createFromReadableStream } from 'next/dist/compiled/react-server-dom-webpack/client'
import { callServer } from 'next/dist/client/app-call-server'
import { linkGc } from 'next/dist/client/app-link-gc'
import { HeadManagerContext } from 'next/dist/shared/lib/head-manager-context'
import { initializeHMR } from '@vercel/turbopack-next/dev/client'
initializeHMR({
assetPrefix: '',
})
window.next = {
version,
appDir: true,
}
globalThis.__next_require__ = (data) => {
const [client_id] = JSON.parse(data)
return __turbopack_require__(client_id)
}
globalThis.__next_chunk_load__ = __turbopack_load__
process.env.__NEXT_NEW_LINK_BEHAVIOR = 'true'
const appElement = document
const getCacheKey = () => {
const { pathname, search } = location
return pathname + search
}
const encoder = new TextEncoder()
let initialServerDataBuffer: string[] | undefined = undefined
let initialServerDataWriter: ReadableStreamDefaultController | undefined =
undefined
let initialServerDataLoaded = false
let initialServerDataFlushed = false
function nextServerDataCallback(
seg: [isBootStrap: 0] | [isNotBootstrap: 1, responsePartial: string]
): number {
if (seg[0] === 0) {
initialServerDataBuffer = []
} else {
if (!initialServerDataBuffer)
throw new Error('Unexpected server data: missing bootstrap script.')
if (initialServerDataWriter) {
initialServerDataWriter.enqueue(encoder.encode(seg[1]))
} else {
initialServerDataBuffer.push(seg[1])
}
}
return 0
}
function nextServerDataRegisterWriter(ctr: ReadableStreamDefaultController) {
if (initialServerDataBuffer) {
initialServerDataBuffer.forEach((val) => {
ctr.enqueue(encoder.encode(val))
})
if (initialServerDataLoaded && !initialServerDataFlushed) {
ctr.close()
initialServerDataFlushed = true
initialServerDataBuffer = undefined
}
}
initialServerDataWriter = ctr
}
// When `DOMContentLoaded`, we can close all pending writers to finish hydration.
const DOMContentLoaded = function () {
if (initialServerDataWriter && !initialServerDataFlushed) {
initialServerDataWriter.close()
initialServerDataFlushed = true
initialServerDataBuffer = undefined
}
initialServerDataLoaded = true
}
// It's possible that the DOM is already loaded.
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', DOMContentLoaded, false)
} else {
DOMContentLoaded()
}
const nextServerDataLoadingGlobal = (self.__next_f = self.__next_f || [])
nextServerDataLoadingGlobal.forEach(nextServerDataCallback)
nextServerDataLoadingGlobal.push = nextServerDataCallback
function createResponseCache() {
return new Map()
}
const rscCache = createResponseCache()
function useInitialServerResponse(cacheKey: string) {
const response = rscCache.get(cacheKey)
if (response) return response
const readable = new ReadableStream({
start(controller) {
nextServerDataRegisterWriter(controller)
},
})
const newResponse = createFromReadableStream(readable, { callServer })
rscCache.set(cacheKey, newResponse)
return newResponse
}
function ServerRoot({ cacheKey }: { cacheKey: string }) {
React.useEffect(() => {
rscCache.delete(cacheKey)
})
const response = useInitialServerResponse(cacheKey)
const root = use(response) as ReactElement
return root
}
function RSCComponent() {
const cacheKey = getCacheKey()
return <ServerRoot cacheKey={cacheKey} />
}
function hydrate() {
const reactEl = (
<React.StrictMode>
<HeadManagerContext.Provider
value={{
appDir: true,
}}
>
<RSCComponent />
</HeadManagerContext.Provider>
</React.StrictMode>
)
const isError = document.documentElement.id === '__next_error__'
if (isError) {
// cast necessary because of a typing bug
const reactRoot = ReactDOMClient.createRoot(
appElement as unknown as DocumentFragment
)
reactRoot.render(reactEl)
} else {
React.startTransition(() => {
ReactDOMClient.hydrateRoot(appElement, reactEl)
})
}
linkGc()
}
window.next = {
version: 'turbo',
appDir: true,
}
hydrate()