rsnext/packages/next/pages/_document.tsx
2021-08-17 09:18:08 +02:00

883 lines
26 KiB
TypeScript

import React, { Component, ReactElement, ReactNode, useContext } from 'react'
import flush from 'styled-jsx/server'
import {
BODY_RENDER_TARGET,
OPTIMIZED_FONT_PROVIDERS,
} from '../shared/lib/constants'
import {
DocumentContext,
DocumentInitialProps,
DocumentProps,
HtmlContext,
HtmlProps,
} from '../shared/lib/utils'
import { BuildManifest, getPageFiles } from '../server/get-page-files'
import { cleanAmpPath } from '../server/utils'
import { htmlEscapeJsonString } from '../server/htmlescape'
import Script, { ScriptProps } from '../client/script'
export { DocumentContext, DocumentInitialProps, DocumentProps }
export type OriginProps = {
nonce?: string
crossOrigin?: string
}
type DocumentFiles = {
sharedFiles: readonly string[]
pageFiles: readonly string[]
allFiles: readonly string[]
}
function getDocumentFiles(
buildManifest: BuildManifest,
pathname: string,
inAmpMode: boolean
): DocumentFiles {
const sharedFiles: readonly string[] = getPageFiles(buildManifest, '/_app')
const pageFiles: readonly string[] = inAmpMode
? []
: getPageFiles(buildManifest, pathname)
return {
sharedFiles,
pageFiles,
allFiles: [...new Set([...sharedFiles, ...pageFiles])],
}
}
function getPolyfillScripts(context: HtmlProps, props: OriginProps) {
// polyfills.js has to be rendered as nomodule without async
// It also has to be the first script to load
const {
assetPrefix,
buildManifest,
devOnlyCacheBusterQueryString,
disableOptimizedLoading,
} = context
return buildManifest.polyfillFiles
.filter(
(polyfill) => polyfill.endsWith('.js') && !polyfill.endsWith('.module.js')
)
.map((polyfill) => (
<script
key={polyfill}
defer={!disableOptimizedLoading}
nonce={props.nonce}
crossOrigin={props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN}
noModule={true}
src={`${assetPrefix}/_next/${polyfill}${devOnlyCacheBusterQueryString}`}
/>
))
}
function getPreNextScripts(context: HtmlProps, props: OriginProps) {
const { scriptLoader, disableOptimizedLoading } = context
return (scriptLoader.beforeInteractive || []).map(
(file: ScriptProps, index: number) => {
const { strategy, ...scriptProps } = file
return (
<script
{...scriptProps}
key={scriptProps.src || index}
defer={!disableOptimizedLoading}
nonce={props.nonce}
crossOrigin={props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN}
/>
)
}
)
}
function getDynamicChunks(
context: HtmlProps,
props: OriginProps,
files: DocumentFiles
) {
const {
dynamicImports,
assetPrefix,
isDevelopment,
devOnlyCacheBusterQueryString,
disableOptimizedLoading,
} = context
return dynamicImports.map((file) => {
if (!file.endsWith('.js') || files.allFiles.includes(file)) return null
return (
<script
async={!isDevelopment && disableOptimizedLoading}
defer={!disableOptimizedLoading}
key={file}
src={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
nonce={props.nonce}
crossOrigin={props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN}
/>
)
})
}
function getScripts(
context: HtmlProps,
props: OriginProps,
files: DocumentFiles
) {
const {
assetPrefix,
buildManifest,
isDevelopment,
devOnlyCacheBusterQueryString,
disableOptimizedLoading,
} = context
const normalScripts = files.allFiles.filter((file) => file.endsWith('.js'))
const lowPriorityScripts = buildManifest.lowPriorityFiles?.filter((file) =>
file.endsWith('.js')
)
return [...normalScripts, ...lowPriorityScripts].map((file) => {
return (
<script
key={file}
src={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
nonce={props.nonce}
async={!isDevelopment && disableOptimizedLoading}
defer={!disableOptimizedLoading}
crossOrigin={props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN}
/>
)
})
}
/**
* `Document` component handles the initial `document` markup and renders only on the server side.
* Commonly used for implementing server side rendering for `css-in-js` libraries.
*/
export default class Document<P = {}> extends Component<DocumentProps & P> {
/**
* `getInitialProps` hook returns the context object with the addition of `renderPage`.
* `renderPage` callback executes `React` rendering logic synchronously to support server-rendering wrappers
*/
static async getInitialProps(
ctx: DocumentContext
): Promise<DocumentInitialProps> {
const enhanceApp = (App: any) => {
return (props: any) => <App {...props} />
}
const { html, head } = await ctx.renderPage({ enhanceApp })
const styles = [...flush()]
return { html, head, styles }
}
render() {
return (
<Html>
<Head />
<body>
<Main />
<NextScript />
</body>
</Html>
)
}
}
export function Html(
props: React.DetailedHTMLProps<
React.HtmlHTMLAttributes<HTMLHtmlElement>,
HTMLHtmlElement
>
) {
const { inAmpMode, docComponentsRendered, locale } = useContext(HtmlContext)
docComponentsRendered.Html = true
return (
<html
{...props}
lang={props.lang || locale || undefined}
amp={inAmpMode ? '' : undefined}
data-ampdevmode={
inAmpMode && process.env.NODE_ENV !== 'production' ? '' : undefined
}
/>
)
}
export class Head extends Component<
OriginProps &
React.DetailedHTMLProps<
React.HTMLAttributes<HTMLHeadElement>,
HTMLHeadElement
>
> {
static contextType = HtmlContext
context!: React.ContextType<typeof HtmlContext>
getCssLinks(files: DocumentFiles): JSX.Element[] | null {
const { assetPrefix, devOnlyCacheBusterQueryString, dynamicImports } =
this.context
const cssFiles = files.allFiles.filter((f) => f.endsWith('.css'))
const sharedFiles: Set<string> = new Set(files.sharedFiles)
// Unmanaged files are CSS files that will be handled directly by the
// webpack runtime (`mini-css-extract-plugin`).
let unmangedFiles: Set<string> = new Set([])
let dynamicCssFiles = Array.from(
new Set(dynamicImports.filter((file) => file.endsWith('.css')))
)
if (dynamicCssFiles.length) {
const existing = new Set(cssFiles)
dynamicCssFiles = dynamicCssFiles.filter(
(f) => !(existing.has(f) || sharedFiles.has(f))
)
unmangedFiles = new Set(dynamicCssFiles)
cssFiles.push(...dynamicCssFiles)
}
let cssLinkElements: JSX.Element[] = []
cssFiles.forEach((file) => {
const isSharedFile = sharedFiles.has(file)
if (!process.env.__NEXT_OPTIMIZE_CSS) {
cssLinkElements.push(
<link
key={`${file}-preload`}
nonce={this.props.nonce}
rel="preload"
href={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
as="style"
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
/>
)
}
const isUnmanagedFile = unmangedFiles.has(file)
cssLinkElements.push(
<link
key={file}
nonce={this.props.nonce}
rel="stylesheet"
href={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
data-n-g={isUnmanagedFile ? undefined : isSharedFile ? '' : undefined}
data-n-p={isUnmanagedFile ? undefined : isSharedFile ? undefined : ''}
/>
)
})
if (
process.env.NODE_ENV !== 'development' &&
process.env.__NEXT_OPTIMIZE_FONTS
) {
cssLinkElements = this.makeStylesheetInert(
cssLinkElements
) as ReactElement[]
}
return cssLinkElements.length === 0 ? null : cssLinkElements
}
getPreloadDynamicChunks() {
const { dynamicImports, assetPrefix, devOnlyCacheBusterQueryString } =
this.context
return (
dynamicImports
.map((file) => {
if (!file.endsWith('.js')) {
return null
}
return (
<link
rel="preload"
key={file}
href={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
as="script"
nonce={this.props.nonce}
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
/>
)
})
// Filter out nulled scripts
.filter(Boolean)
)
}
getPreloadMainLinks(files: DocumentFiles): JSX.Element[] | null {
const { assetPrefix, devOnlyCacheBusterQueryString, scriptLoader } =
this.context
const preloadFiles = files.allFiles.filter((file: string) => {
return file.endsWith('.js')
})
return [
...(scriptLoader.beforeInteractive || []).map((file) => (
<link
key={file.src}
nonce={this.props.nonce}
rel="preload"
href={file.src}
as="script"
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
/>
)),
...preloadFiles.map((file: string) => (
<link
key={file}
nonce={this.props.nonce}
rel="preload"
href={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
as="script"
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
/>
)),
]
}
getDynamicChunks(files: DocumentFiles) {
return getDynamicChunks(this.context, this.props, files)
}
getPreNextScripts() {
return getPreNextScripts(this.context, this.props)
}
getScripts(files: DocumentFiles) {
return getScripts(this.context, this.props, files)
}
getPolyfillScripts() {
return getPolyfillScripts(this.context, this.props)
}
handleDocumentScriptLoaderItems(children: React.ReactNode): ReactNode[] {
const { scriptLoader } = this.context
const scriptLoaderItems: ScriptProps[] = []
const filteredChildren: ReactNode[] = []
React.Children.forEach(children, (child: any) => {
if (child.type === Script) {
if (child.props.strategy === 'beforeInteractive') {
scriptLoader.beforeInteractive = (
scriptLoader.beforeInteractive || []
).concat([
{
...child.props,
},
])
return
} else if (
['lazyOnload', 'afterInteractive'].includes(child.props.strategy)
) {
scriptLoaderItems.push(child.props)
return
}
}
filteredChildren.push(child)
})
this.context.__NEXT_DATA__.scriptLoader = scriptLoaderItems
return filteredChildren
}
makeStylesheetInert(node: ReactNode): ReactNode[] {
return React.Children.map(node, (c: any) => {
if (
c.type === 'link' &&
c.props['href'] &&
OPTIMIZED_FONT_PROVIDERS.some(({ url }) =>
c.props['href'].startsWith(url)
)
) {
const newProps = { ...(c.props || {}) }
newProps['data-href'] = newProps['href']
newProps['href'] = undefined
return React.cloneElement(c, newProps)
} else if (c.props && c.props['children']) {
c.props['children'] = this.makeStylesheetInert(c.props['children'])
}
return c
})
}
render() {
const {
styles,
ampPath,
inAmpMode,
hybridAmp,
canonicalBase,
__NEXT_DATA__,
dangerousAsPath,
headTags,
unstable_runtimeJS,
unstable_JsPreload,
disableOptimizedLoading,
} = this.context
const disableRuntimeJS = unstable_runtimeJS === false
const disableJsPreload =
unstable_JsPreload === false || !disableOptimizedLoading
this.context.docComponentsRendered.Head = true
let { head } = this.context
let cssPreloads: Array<JSX.Element> = []
let otherHeadElements: Array<JSX.Element> = []
if (head) {
head.forEach((c) => {
if (
c &&
c.type === 'link' &&
c.props['rel'] === 'preload' &&
c.props['as'] === 'style'
) {
cssPreloads.push(c)
} else {
c && otherHeadElements.push(c)
}
})
head = cssPreloads.concat(otherHeadElements)
}
let children = React.Children.toArray(this.props.children).filter(Boolean)
// show a warning if Head contains <title> (only in development)
if (process.env.NODE_ENV !== 'production') {
children = React.Children.map(children, (child: any) => {
const isReactHelmet = child?.props?.['data-react-helmet']
if (!isReactHelmet) {
if (child?.type === 'title') {
console.warn(
"Warning: <title> should not be used in _document.js's <Head>. https://nextjs.org/docs/messages/no-document-title"
)
} else if (
child?.type === 'meta' &&
child?.props?.name === 'viewport'
) {
console.warn(
"Warning: viewport meta tags should not be used in _document.js's <Head>. https://nextjs.org/docs/messages/no-document-viewport-meta"
)
}
}
return child
})
if (this.props.crossOrigin)
console.warn(
'Warning: `Head` attribute `crossOrigin` is deprecated. https://nextjs.org/docs/messages/doc-crossorigin-deprecated'
)
}
if (
process.env.NODE_ENV !== 'development' &&
process.env.__NEXT_OPTIMIZE_FONTS &&
!inAmpMode
) {
children = this.makeStylesheetInert(children)
}
children = this.handleDocumentScriptLoaderItems(children)
let hasAmphtmlRel = false
let hasCanonicalRel = false
// show warning and remove conflicting amp head tags
head = React.Children.map(head || [], (child) => {
if (!child) return child
const { type, props } = child
if (inAmpMode) {
let badProp: string = ''
if (type === 'meta' && props.name === 'viewport') {
badProp = 'name="viewport"'
} else if (type === 'link' && props.rel === 'canonical') {
hasCanonicalRel = true
} else if (type === 'script') {
// only block if
// 1. it has a src and isn't pointing to ampproject's CDN
// 2. it is using dangerouslySetInnerHTML without a type or
// a type of text/javascript
if (
(props.src && props.src.indexOf('ampproject') < -1) ||
(props.dangerouslySetInnerHTML &&
(!props.type || props.type === 'text/javascript'))
) {
badProp = '<script'
Object.keys(props).forEach((prop) => {
badProp += ` ${prop}="${props[prop]}"`
})
badProp += '/>'
}
}
if (badProp) {
console.warn(
`Found conflicting amp tag "${child.type}" with conflicting prop ${badProp} in ${__NEXT_DATA__.page}. https://nextjs.org/docs/messages/conflicting-amp-tag`
)
return null
}
} else {
// non-amp mode
if (type === 'link' && props.rel === 'amphtml') {
hasAmphtmlRel = true
}
}
return child
})
// try to parse styles from fragment for backwards compat
const curStyles: React.ReactElement[] = Array.isArray(styles)
? (styles as React.ReactElement[])
: []
if (
inAmpMode &&
styles &&
// @ts-ignore Property 'props' does not exist on type ReactElement
styles.props &&
// @ts-ignore Property 'props' does not exist on type ReactElement
Array.isArray(styles.props.children)
) {
const hasStyles = (el: React.ReactElement) =>
el?.props?.dangerouslySetInnerHTML?.__html
// @ts-ignore Property 'props' does not exist on type ReactElement
styles.props.children.forEach((child: React.ReactElement) => {
if (Array.isArray(child)) {
child.forEach((el) => hasStyles(el) && curStyles.push(el))
} else if (hasStyles(child)) {
curStyles.push(child)
}
})
}
const files: DocumentFiles = getDocumentFiles(
this.context.buildManifest,
this.context.__NEXT_DATA__.page,
inAmpMode
)
return (
<head {...this.props}>
{this.context.isDevelopment && (
<>
<style
data-next-hide-fouc
data-ampdevmode={inAmpMode ? 'true' : undefined}
dangerouslySetInnerHTML={{
__html: `body{display:none}`,
}}
/>
<noscript
data-next-hide-fouc
data-ampdevmode={inAmpMode ? 'true' : undefined}
>
<style
dangerouslySetInnerHTML={{
__html: `body{display:block}`,
}}
/>
</noscript>
</>
)}
{children}
{process.env.__NEXT_OPTIMIZE_FONTS && (
<meta name="next-font-preconnect" />
)}
{head}
<meta
name="next-head-count"
content={React.Children.count(head || []).toString()}
/>
{inAmpMode && (
<>
<meta
name="viewport"
content="width=device-width,minimum-scale=1,initial-scale=1"
/>
{!hasCanonicalRel && (
<link
rel="canonical"
href={canonicalBase + cleanAmpPath(dangerousAsPath)}
/>
)}
{/* https://www.ampproject.org/docs/fundamentals/optimize_amp#optimize-the-amp-runtime-loading */}
<link
rel="preload"
as="script"
href="https://cdn.ampproject.org/v0.js"
/>
{/* Add custom styles before AMP styles to prevent accidental overrides */}
{styles && (
<style
amp-custom=""
dangerouslySetInnerHTML={{
__html: curStyles
.map((style) => style.props.dangerouslySetInnerHTML.__html)
.join('')
.replace(/\/\*# sourceMappingURL=.*\*\//g, '')
.replace(/\/\*@ sourceURL=.*?\*\//g, ''),
}}
/>
)}
<style
amp-boilerplate=""
dangerouslySetInnerHTML={{
__html: `body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}`,
}}
/>
<noscript>
<style
amp-boilerplate=""
dangerouslySetInnerHTML={{
__html: `body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}`,
}}
/>
</noscript>
<script async src="https://cdn.ampproject.org/v0.js" />
</>
)}
{!inAmpMode && (
<>
{!hasAmphtmlRel && hybridAmp && (
<link
rel="amphtml"
href={canonicalBase + getAmpPath(ampPath, dangerousAsPath)}
/>
)}
{!process.env.__NEXT_OPTIMIZE_CSS && this.getCssLinks(files)}
{!process.env.__NEXT_OPTIMIZE_CSS && (
<noscript data-n-css={this.props.nonce ?? ''} />
)}
{process.env.__NEXT_OPTIMIZE_IMAGES && (
<meta name="next-image-preload" />
)}
{!disableRuntimeJS &&
!disableJsPreload &&
this.getPreloadDynamicChunks()}
{!disableRuntimeJS &&
!disableJsPreload &&
this.getPreloadMainLinks(files)}
{!disableOptimizedLoading &&
!disableRuntimeJS &&
this.getPolyfillScripts()}
{!disableOptimizedLoading &&
!disableRuntimeJS &&
this.getPreNextScripts()}
{!disableOptimizedLoading &&
!disableRuntimeJS &&
this.getDynamicChunks(files)}
{!disableOptimizedLoading &&
!disableRuntimeJS &&
this.getScripts(files)}
{process.env.__NEXT_OPTIMIZE_CSS && this.getCssLinks(files)}
{process.env.__NEXT_OPTIMIZE_CSS && (
<noscript data-n-css={this.props.nonce ?? ''} />
)}
{this.context.isDevelopment && (
// this element is used to mount development styles so the
// ordering matches production
// (by default, style-loader injects at the bottom of <head />)
<noscript id="__next_css__DO_NOT_USE__" />
)}
{styles || null}
</>
)}
{React.createElement(React.Fragment, {}, ...(headTags || []))}
</head>
)
}
}
export function Main() {
const { inAmpMode, docComponentsRendered } = useContext(HtmlContext)
docComponentsRendered.Main = true
if (inAmpMode) return <>{BODY_RENDER_TARGET}</>
return <div id="__next">{BODY_RENDER_TARGET}</div>
}
export class NextScript extends Component<OriginProps> {
static contextType = HtmlContext
context!: React.ContextType<typeof HtmlContext>
// Source: https://gist.github.com/samthor/64b114e4a4f539915a95b91ffd340acc
static safariNomoduleFix =
'!function(){var e=document,t=e.createElement("script");if(!("noModule"in t)&&"onbeforeload"in t){var n=!1;e.addEventListener("beforeload",function(e){if(e.target===t)n=!0;else if(!e.target.hasAttribute("nomodule")||!n)return;e.preventDefault()},!0),t.type="module",t.src=".",e.head.appendChild(t),t.remove()}}();'
getDynamicChunks(files: DocumentFiles) {
return getDynamicChunks(this.context, this.props, files)
}
getPreNextScripts() {
return getPreNextScripts(this.context, this.props)
}
getScripts(files: DocumentFiles) {
return getScripts(this.context, this.props, files)
}
getPolyfillScripts() {
return getPolyfillScripts(this.context, this.props)
}
static getInlineScriptSource(context: Readonly<HtmlProps>): string {
const { __NEXT_DATA__ } = context
try {
const data = JSON.stringify(__NEXT_DATA__)
return htmlEscapeJsonString(data)
} catch (err) {
if (err.message.indexOf('circular structure')) {
throw new Error(
`Circular structure in "getInitialProps" result of page "${__NEXT_DATA__.page}". https://nextjs.org/docs/messages/circular-structure`
)
}
throw err
}
}
render() {
const {
assetPrefix,
inAmpMode,
buildManifest,
unstable_runtimeJS,
docComponentsRendered,
devOnlyCacheBusterQueryString,
disableOptimizedLoading,
} = this.context
const disableRuntimeJS = unstable_runtimeJS === false
docComponentsRendered.NextScript = true
if (inAmpMode) {
if (process.env.NODE_ENV === 'production') {
return null
}
const ampDevFiles = [
...buildManifest.devFiles,
...buildManifest.polyfillFiles,
...buildManifest.ampDevFiles,
]
return (
<>
{disableRuntimeJS ? null : (
<script
id="__NEXT_DATA__"
type="application/json"
nonce={this.props.nonce}
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
dangerouslySetInnerHTML={{
__html: NextScript.getInlineScriptSource(this.context),
}}
data-ampdevmode
/>
)}
{ampDevFiles.map((file) => (
<script
key={file}
src={`${assetPrefix}/_next/${file}${devOnlyCacheBusterQueryString}`}
nonce={this.props.nonce}
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
data-ampdevmode
/>
))}
</>
)
}
if (process.env.NODE_ENV !== 'production') {
if (this.props.crossOrigin)
console.warn(
'Warning: `NextScript` attribute `crossOrigin` is deprecated. https://nextjs.org/docs/messages/doc-crossorigin-deprecated'
)
}
const files: DocumentFiles = getDocumentFiles(
this.context.buildManifest,
this.context.__NEXT_DATA__.page,
inAmpMode
)
return (
<>
{!disableRuntimeJS && buildManifest.devFiles
? buildManifest.devFiles.map((file: string) => (
<script
key={file}
src={`${assetPrefix}/_next/${encodeURI(
file
)}${devOnlyCacheBusterQueryString}`}
nonce={this.props.nonce}
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
/>
))
: null}
{disableRuntimeJS ? null : (
<script
id="__NEXT_DATA__"
type="application/json"
nonce={this.props.nonce}
crossOrigin={
this.props.crossOrigin || process.env.__NEXT_CROSS_ORIGIN
}
dangerouslySetInnerHTML={{
__html: NextScript.getInlineScriptSource(this.context),
}}
/>
)}
{disableOptimizedLoading &&
!disableRuntimeJS &&
this.getPolyfillScripts()}
{disableOptimizedLoading &&
!disableRuntimeJS &&
this.getPreNextScripts()}
{disableOptimizedLoading &&
!disableRuntimeJS &&
this.getDynamicChunks(files)}
{disableOptimizedLoading && !disableRuntimeJS && this.getScripts(files)}
</>
)
}
}
function getAmpPath(ampPath: string, asPath: string): string {
return ampPath || `${asPath}${asPath.includes('?') ? '&' : '?'}amp=1`
}