-
Notifications
You must be signed in to change notification settings - Fork 26.1k
/
app-index.tsx
280 lines (240 loc) · 8.05 KB
/
app-index.tsx
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
/* global location */
import '../build/polyfills/polyfill-module'
// @ts-ignore react-dom/client exists when using React 18
import ReactDOMClient from 'react-dom/client'
// @ts-ignore startTransition exists when using React 18
import React from 'react'
import { createFromReadableStream } from 'next/dist/compiled/react-server-dom-webpack'
/// <reference types="react-dom/experimental" />
// Override chunk URL mapping in the webpack runtime
// https://github.com/webpack/webpack/blob/2738eebc7880835d88c727d364ad37f3ec557593/lib/RuntimeGlobals.js#L204
declare global {
const __webpack_require__: any
}
// eslint-disable-next-line no-undef
const getChunkScriptFilename = __webpack_require__.u
const chunkFilenameMap: any = {}
// eslint-disable-next-line no-undef
__webpack_require__.u = (chunkId: any) => {
return chunkFilenameMap[chunkId] || getChunkScriptFilename(chunkId)
}
// Ignore the module ID transform in client.
// eslint-disable-next-line no-undef
// @ts-expect-error TODO: fix type
self.__next_require__ = __webpack_require__
// eslint-disable-next-line no-undef
;(self as any).__next_chunk_load__ = (chunk: string) => {
if (!chunk) return Promise.resolve()
if (chunk.endsWith('.css')) {
const existingTag = document.querySelector(`link[href="${chunk}"]`)
if (!existingTag) {
const link = document.createElement('link')
link.rel = 'stylesheet'
link.href = '/_next/' + chunk
document.head.appendChild(link)
}
return Promise.resolve()
}
const [chunkId, chunkFileName] = chunk.split(':')
chunkFilenameMap[chunkId] = `static/chunks/${chunkFileName}.js`
// @ts-ignore
// eslint-disable-next-line no-undef
return __webpack_chunk_load__(chunkId)
}
export const version = process.env.__NEXT_VERSION
const appElement: HTMLElement | Document | null = document
let reactRoot: any = null
function renderReactElement(
domEl: HTMLElement | Document,
fn: () => JSX.Element
): void {
const reactEl = fn()
if (!reactRoot) {
// Unlike with createRoot, you don't need a separate root.render() call here
reactRoot = (ReactDOMClient as any).hydrateRoot(domEl, reactEl)
} else {
reactRoot.render(reactEl)
}
}
const getCacheKey = () => {
const { pathname, search } = location
return pathname + search
}
const encoder = new TextEncoder()
const loadedCss: Set<string> = new Set()
let initialServerDataBuffer: string[] | undefined = undefined
let initialServerDataWriter: ReadableStreamDefaultController | undefined =
undefined
let initialServerDataLoaded = false
let initialServerDataFlushed = false
function nextServerDataCallback(seg: [number, string, string]) {
if (seg[0] === 0) {
initialServerDataBuffer = []
} else {
if (!initialServerDataBuffer)
throw new Error('Unexpected server data: missing bootstrap script.')
if (initialServerDataWriter) {
initialServerDataWriter.enqueue(encoder.encode(seg[2]))
} else {
initialServerDataBuffer.push(seg[2])
}
}
}
// There might be race conditions between `nextServerDataRegisterWriter` and
// `DOMContentLoaded`. The former will be called when React starts to hydrate
// the root, the latter will be called when the DOM is fully loaded.
// For streaming, the former is called first due to partial hydration.
// For non-streaming, the latter can be called first.
// Hence, we use two variables `initialServerDataLoaded` and
// `initialServerDataFlushed` to make sure the writer will be closed and
// `initialServerDataBuffer` will be cleared in the right time.
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 as any).__next_s =
(self as any).__next_s || [])
nextServerDataLoadingGlobal.forEach(nextServerDataCallback)
nextServerDataLoadingGlobal.push = nextServerDataCallback
function createResponseCache() {
return new Map<string, any>()
}
const rscCache = createResponseCache()
async function loadCss(cssChunkInfoJson: string) {
const data = JSON.parse(cssChunkInfoJson)
await Promise.all(
data.chunks.map((chunkId: string) => {
// load css related chunks
return (self as any).__next_chunk_load__(chunkId)
})
)
// In development mode, import css in dev when it's wrapped by style loader.
// In production mode, css are standalone chunk that doesn't need to be imported.
if (data.id) {
return (self as any).__next_require__(data.id)
}
return Promise.resolve()
}
function createLoadFlightCssStream(callback?: () => Promise<void>) {
const cssLoadingPromises: Promise<any>[] = []
const loadCssFromStreamData = (data: string) => {
if (data.startsWith('CSS')) {
const cssJson = data.slice(4).trim()
if (!loadedCss.has(cssJson)) {
loadedCss.add(cssJson)
cssLoadingPromises.push(loadCss(cssJson))
}
}
}
// TODO-APP: Refine the buffering code here to make it more correct.
let buffer = ''
const loadCssFromFlight = new TransformStream({
transform(chunk, controller) {
const process = (buf: string) => {
if (buf) {
if (buf.startsWith('CSS:')) {
loadCssFromStreamData(buf)
} else {
controller.enqueue(new TextEncoder().encode(buf))
}
}
}
const data = new TextDecoder().decode(chunk)
buffer += data
let index
while ((index = buffer.indexOf('\n')) !== -1) {
const line = buffer.slice(0, index + 1)
buffer = buffer.slice(index + 1)
process(line)
}
process(buffer)
buffer = ''
},
})
if (process.env.NODE_ENV === 'development') {
Promise.all(cssLoadingPromises).then(() => {
// TODO: find better timing for css injection
setTimeout(() => {
callback?.()
})
})
}
return loadCssFromFlight
}
function useInitialServerResponse(cacheKey: string, onFlightCssLoaded: any) {
const response = rscCache.get(cacheKey)
if (response) return response
const readable = new ReadableStream({
start(controller) {
nextServerDataRegisterWriter(controller)
},
})
const newResponse = createFromReadableStream(
readable.pipeThrough(createLoadFlightCssStream(onFlightCssLoaded))
)
rscCache.set(cacheKey, newResponse)
return newResponse
}
function ServerRoot({
cacheKey,
onFlightCssLoaded,
}: {
cacheKey: string
onFlightCssLoaded: any
}) {
React.useEffect(() => {
rscCache.delete(cacheKey)
})
const response = useInitialServerResponse(cacheKey, onFlightCssLoaded)
const root = response.readRoot()
return root
}
function Root({ children }: React.PropsWithChildren<{}>): React.ReactElement {
if (process.env.__NEXT_TEST_MODE) {
// eslint-disable-next-line react-hooks/rules-of-hooks
React.useEffect(() => {
window.__NEXT_HYDRATED = true
if (window.__NEXT_HYDRATED_CB) {
window.__NEXT_HYDRATED_CB()
}
}, [])
}
return children as React.ReactElement
}
function RSCComponent(props: any) {
const cacheKey = getCacheKey()
return <ServerRoot {...props} cacheKey={cacheKey} />
}
export function hydrate(opts?: { onFlightCssLoaded?: () => Promise<void> }) {
renderReactElement(appElement!, () => (
<React.StrictMode>
<Root>
<RSCComponent onFlightCssLoaded={opts?.onFlightCssLoaded} />
</Root>
</React.StrictMode>
))
}