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hot-reloader.client.tsx
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hot-reloader.client.tsx
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import { useCallback, useContext, useEffect, useRef } from 'react'
import { FullAppTreeContext } from '../../shared/lib/app-router-context'
import {
register,
onBuildError,
onBuildOk,
onRefresh,
} from 'next/dist/compiled/@next/react-dev-overlay/dist/client'
import stripAnsi from 'next/dist/compiled/strip-ansi'
import formatWebpackMessages from '../dev/error-overlay/format-webpack-messages'
import { useRouter } from './hooks-client'
function getSocketProtocol(assetPrefix: string): string {
let protocol = window.location.protocol
try {
// assetPrefix is a url
protocol = new URL(assetPrefix).protocol
} catch (_) {}
return protocol === 'http:' ? 'ws' : 'wss'
}
// const TIMEOUT = 5000
// TODO: add actual type
type PongEvent = any
let mostRecentCompilationHash: any = null
let __nextDevClientId = Math.round(Math.random() * 100 + Date.now())
let hadRuntimeError = false
// let startLatency = undefined
function onFastRefresh(hasUpdates: boolean) {
onBuildOk()
if (hasUpdates) {
onRefresh()
}
// if (startLatency) {
// const endLatency = Date.now()
// const latency = endLatency - startLatency
// console.log(`[Fast Refresh] done in ${latency}ms`)
// sendMessage(
// JSON.stringify({
// event: 'client-hmr-latency',
// id: __nextDevClientId,
// startTime: startLatency,
// endTime: endLatency,
// })
// )
// // if (self.__NEXT_HMR_LATENCY_CB) {
// // self.__NEXT_HMR_LATENCY_CB(latency)
// // }
// }
}
// There is a newer version of the code available.
function handleAvailableHash(hash: string) {
// Update last known compilation hash.
mostRecentCompilationHash = hash
}
// Is there a newer version of this code available?
function isUpdateAvailable() {
/* globals __webpack_hash__ */
// __webpack_hash__ is the hash of the current compilation.
// It's a global variable injected by Webpack.
// @ts-expect-error __webpack_hash__ exists
return mostRecentCompilationHash !== __webpack_hash__
}
// Webpack disallows updates in other states.
function canApplyUpdates() {
// @ts-expect-error module.hot exists
return module.hot.status() === 'idle'
}
// function afterApplyUpdates(fn: any) {
// if (canApplyUpdates()) {
// fn()
// } else {
// function handler(status: any) {
// if (status === 'idle') {
// // @ts-expect-error module.hot exists
// module.hot.removeStatusHandler(handler)
// fn()
// }
// }
// // @ts-expect-error module.hot exists
// module.hot.addStatusHandler(handler)
// }
// }
// Attempt to update code on the fly, fall back to a hard reload.
function tryApplyUpdates(onHotUpdateSuccess: any, sendMessage: any) {
// @ts-expect-error module.hot exists
if (!module.hot) {
// HotModuleReplacementPlugin is not in Webpack configuration.
console.error('HotModuleReplacementPlugin is not in Webpack configuration.')
// window.location.reload();
return
}
if (!isUpdateAvailable() || !canApplyUpdates()) {
onBuildOk()
return
}
function handleApplyUpdates(err: any, updatedModules: any) {
if (err || hadRuntimeError || !updatedModules) {
if (err) {
console.warn(
'[Fast Refresh] performing full reload\n\n' +
"Fast Refresh will perform a full reload when you edit a file that's imported by modules outside of the React rendering tree.\n" +
'You might have a file which exports a React component but also exports a value that is imported by a non-React component file.\n' +
'Consider migrating the non-React component export to a separate file and importing it into both files.\n\n' +
'It is also possible the parent component of the component you edited is a class component, which disables Fast Refresh.\n' +
'Fast Refresh requires at least one parent function component in your React tree.'
)
} else if (hadRuntimeError) {
console.warn(
'[Fast Refresh] performing full reload because your application had an unrecoverable error'
)
}
performFullReload(err, sendMessage)
return
}
const hasUpdates = Boolean(updatedModules.length)
if (typeof onHotUpdateSuccess === 'function') {
// Maybe we want to do something.
onHotUpdateSuccess(hasUpdates)
}
if (isUpdateAvailable()) {
// While we were updating, there was a new update! Do it again.
tryApplyUpdates(hasUpdates ? onBuildOk : onHotUpdateSuccess, sendMessage)
} else {
onBuildOk()
// if (process.env.__NEXT_TEST_MODE) {
// afterApplyUpdates(() => {
// if (self.__NEXT_HMR_CB) {
// self.__NEXT_HMR_CB()
// self.__NEXT_HMR_CB = null
// }
// })
// }
}
}
// https://webpack.js.org/api/hot-module-replacement/#check
// @ts-expect-error module.hot exists
module.hot.check(/* autoApply */ true).then(
(updatedModules: any) => {
handleApplyUpdates(null, updatedModules)
},
(err: any) => {
handleApplyUpdates(err, null)
}
)
}
function performFullReload(err: any, sendMessage: any) {
const stackTrace =
err &&
((err.stack && err.stack.split('\n').slice(0, 5).join('\n')) ||
err.message ||
err + '')
sendMessage(
JSON.stringify({
event: 'client-full-reload',
stackTrace,
})
)
window.location.reload()
}
function processMessage(
e: any,
sendMessage: any,
router: ReturnType<typeof useRouter>
) {
const obj = JSON.parse(e.data)
switch (obj.action) {
case 'building': {
// startLatency = Date.now()
console.log('[Fast Refresh] rebuilding')
break
}
case 'built':
case 'sync': {
if (obj.hash) {
handleAvailableHash(obj.hash)
}
const { errors, warnings } = obj
const hasErrors = Boolean(errors && errors.length)
// Compilation with errors (e.g. syntax error or missing modules).
if (hasErrors) {
sendMessage(
JSON.stringify({
event: 'client-error',
errorCount: errors.length,
clientId: __nextDevClientId,
})
)
// "Massage" webpack messages.
var formatted = formatWebpackMessages({
errors: errors,
warnings: [],
})
// Only show the first error.
onBuildError(formatted.errors[0])
// Also log them to the console.
for (let i = 0; i < formatted.errors.length; i++) {
console.error(stripAnsi(formatted.errors[i]))
}
// Do not attempt to reload now.
// We will reload on next success instead.
// if (process.env.__NEXT_TEST_MODE) {
// if (self.__NEXT_HMR_CB) {
// self.__NEXT_HMR_CB(formatted.errors[0])
// self.__NEXT_HMR_CB = null
// }
// }
return
}
const hasWarnings = Boolean(warnings && warnings.length)
if (hasWarnings) {
sendMessage(
JSON.stringify({
event: 'client-warning',
warningCount: warnings.length,
clientId: __nextDevClientId,
})
)
// Compilation with warnings (e.g. ESLint).
const isHotUpdate = obj.action !== 'sync'
// Print warnings to the console.
const formattedMessages = formatWebpackMessages({
warnings: warnings,
errors: [],
})
for (let i = 0; i < formattedMessages.warnings.length; i++) {
if (i === 5) {
console.warn(
'There were more warnings in other files.\n' +
'You can find a complete log in the terminal.'
)
break
}
console.warn(stripAnsi(formattedMessages.warnings[i]))
}
// Attempt to apply hot updates or reload.
if (isHotUpdate) {
tryApplyUpdates(function onSuccessfulHotUpdate(hasUpdates: any) {
// Only dismiss it when we're sure it's a hot update.
// Otherwise it would flicker right before the reload.
onFastRefresh(hasUpdates)
}, sendMessage)
}
return
}
sendMessage(
JSON.stringify({
event: 'client-success',
clientId: __nextDevClientId,
})
)
const isHotUpdate =
obj.action !== 'sync' ||
((!window.__NEXT_DATA__ || window.__NEXT_DATA__.page !== '/_error') &&
isUpdateAvailable())
// Attempt to apply hot updates or reload.
if (isHotUpdate) {
tryApplyUpdates(function onSuccessfulHotUpdate(hasUpdates: any) {
// Only dismiss it when we're sure it's a hot update.
// Otherwise it would flicker right before the reload.
onFastRefresh(hasUpdates)
}, sendMessage)
}
return
}
// TODO: make server component change more granular
case 'serverComponentChanges': {
sendMessage(
JSON.stringify({
event: 'server-component-reload-page',
clientId: __nextDevClientId,
})
)
return router.reload()
}
case 'reloadPage': {
sendMessage(
JSON.stringify({
event: 'client-reload-page',
clientId: __nextDevClientId,
})
)
return window.location.reload()
}
case 'removedPage': {
// const [page] = obj.data
// if (page === window.next.router.pathname) {
// sendMessage(
// JSON.stringify({
// event: 'client-removed-page',
// clientId: window.__nextDevClientId,
// page,
// })
// )
// return window.location.reload()
// }
return
}
case 'addedPage': {
// const [page] = obj.data
// if (
// page === window.next.router.pathname &&
// typeof window.next.router.components[page] === 'undefined'
// ) {
// sendMessage(
// JSON.stringify({
// event: 'client-added-page',
// clientId: window.__nextDevClientId,
// page,
// })
// )
// return window.location.reload()
// }
return
}
case 'pong': {
const { invalid } = obj
if (invalid) {
// Payload can be invalid even if the page does exist.
// So, we check if it can be created.
fetch(location.href, {
credentials: 'same-origin',
}).then((pageRes) => {
if (pageRes.status === 200) {
// Page exists now, reload
location.reload()
} else {
// TODO: fix this
// Page doesn't exist
// if (
// self.__NEXT_DATA__.page === Router.pathname &&
// Router.pathname !== '/_error'
// ) {
// // We are still on the page,
// // reload to show 404 error page
// location.reload()
// }
}
})
}
return
}
default: {
throw new Error('Unexpected action ' + obj.action)
}
}
}
export default function HotReload({ assetPrefix }: { assetPrefix: string }) {
const { tree } = useContext(FullAppTreeContext)
const router = useRouter()
const webSocketRef = useRef<WebSocket>()
const sendMessage = useCallback((data) => {
const socket = webSocketRef.current
if (!socket || socket.readyState !== socket.OPEN) return
return socket.send(data)
}, [])
useEffect(() => {
register()
}, [])
useEffect(() => {
if (webSocketRef.current) {
return
}
const { hostname, port } = window.location
const protocol = getSocketProtocol(assetPrefix || '')
const normalizedAssetPrefix = assetPrefix.replace(/^\/+/, '')
let url = `${protocol}://${hostname}:${port}${
normalizedAssetPrefix ? `/${normalizedAssetPrefix}` : ''
}`
if (normalizedAssetPrefix.startsWith('http')) {
url = `${protocol}://${normalizedAssetPrefix.split('://')[1]}`
}
webSocketRef.current = new window.WebSocket(`${url}/_next/webpack-hmr`)
}, [assetPrefix])
useEffect(() => {
// Taken from on-demand-entries-client.js
// TODO: check 404 case
const interval = setInterval(() => {
sendMessage(
JSON.stringify({
event: 'ping',
// TODO: fix case for dynamic parameters, this will be resolved wrong currently.
tree,
appDirRoute: true,
})
)
}, 2500)
return () => clearInterval(interval)
}, [tree, sendMessage])
useEffect(() => {
const handler = (event: MessageEvent<PongEvent>) => {
if (
event.data.indexOf('action') === -1 &&
// TODO: clean this up for consistency
event.data.indexOf('pong') === -1
) {
return
}
try {
processMessage(event, sendMessage, router)
} catch (ex) {
console.warn('Invalid HMR message: ' + event.data + '\n', ex)
}
}
if (webSocketRef.current) {
webSocketRef.current.addEventListener('message', handler)
}
return () =>
webSocketRef.current &&
webSocketRef.current.removeEventListener('message', handler)
}, [sendMessage, router])
// useEffect(() => {
// const interval = setInterval(function () {
// if (
// lastActivityRef.current &&
// Date.now() - lastActivityRef.current > TIMEOUT
// ) {
// handleDisconnect()
// }
// }, 2500)
// return () => clearInterval(interval)
// })
return null
}