Font subsets in function call

packages/font/src/google/loader.ts

@@ -21,16 +21,8 @@ const downloadGoogleFonts: FontLoader = async ({
   data,
   config,
   emitFontFile,
+  isServer,
 }) => {
-  if (!config?.subsets) {
-    Log.warn(
-      `${chalk.bold('@next/font/google')} is missing ${chalk.bold(
-        'options.subsets'
-      )} in your ${chalk.bold(
-        'next.config.js'
-      )}. Please specify subsets, otherwise no fonts will be preloaded.`
-    )
-  }
   const subsets = config?.subsets || []
 
   const {
@@ -43,7 +35,19 @@ const downloadGoogleFonts: FontLoader = async ({
     fallback,
     adjustFontFallback,
     variable,
+    subsets: callSubsets,
   } = validateData(functionName, data)
+
+  if (isServer && preload && !callSubsets && !config?.subsets) {
+    Log.warn(
+      `The ${chalk.bold('@next/font/google')} font ${chalk.bold(
+        fontFamily
+      )} has no selected subsets. Please specify subsets in the function call or in your ${chalk.bold(
+        'next.config.js'
+      )}, otherwise no fonts will be preloaded. Read more: https://nextjs.org/docs/api-reference/components/font#nextfontgoogle`
+    )
+  }
+
   const fontAxes = getFontAxes(fontFamily, weight, style, selectedVariableAxes)
   const url = getUrl(fontFamily, fontAxes, display)
 
@@ -72,7 +76,8 @@ const downloadGoogleFonts: FontLoader = async ({
       if (googleFontFileUrl) {
         fontFiles.push({
           googleFontFileUrl,
-          preloadFontFile: !!preload && subsets.includes(currentSubset),
+          preloadFontFile:
+            !!preload && (callSubsets ?? subsets).includes(currentSubset),
         })
       }
     }

packages/font/src/google/utils.ts

@@ -16,6 +16,7 @@ type FontOptions = {
   fallback?: string[]
   adjustFontFallback: boolean
   variable?: string
+  subsets?: string[]
 }
 export function validateData(functionName: string, data: any): FontOptions {
   let {
@@ -27,6 +28,7 @@ export function validateData(functionName: string, data: any): FontOptions {
     fallback,
     adjustFontFallback = true,
     variable,
+    subsets,
   } = data[0] || ({} as any)
   if (functionName === '') {
     throw new Error(`@next/font/google has no default export`)
@@ -98,6 +100,7 @@ export function validateData(functionName: string, data: any): FontOptions {
     fallback,
     adjustFontFallback,
     variable,
+    subsets,
   }
 }
 

packages/next/build/webpack/loaders/next-font-loader/index.ts

@@ -78,6 +78,7 @@ export default async function nextFontLoader(this: any) {
               src.startsWith('.') ? src : `./${src}`
             ),
           fs: this.fs,
+          isServer,
         })
 
       const { postcss } = await getPostcss()

packages/next/font/index.d.ts

@@ -19,6 +19,7 @@ export type FontLoader = (options: {
   emitFontFile: (content: Buffer, ext: string, preload: boolean) => string
   resolve: (src: string) => string
   fs: any
+  isServer: boolean
 }) => Promise<{
   css: string
   fallbackFonts?: string[]

scripts/update-google-fonts.js

@@ -15,7 +15,8 @@ const fetch = require('node-fetch')
   type CssVariable = \`--\${string}\`
   `
   const fontData = {}
-  for (let { family, fonts, axes } of familyMetadataList) {
+  for (let { family, fonts, axes, subsets } of familyMetadataList) {
+    subsets = subsets.filter((subset) => subset !== 'menu')
     const weights = new Set()
     const styles = new Set()
 
@@ -61,6 +62,7 @@ const fetch = require('node-fetch')
     preload?:boolean
     fallback?: string[]
     adjustFontFallback?: boolean
+    subsets?: Array<${subsets.map((subset) => `"${subset}"`).join('|')}>
     ${
       optionalAxes
         ? `axes?:(${optionalAxes.map(({ tag }) => `'${tag}'`).join('|')})[]`

test/e2e/next-font/app/components/CompWithFonts.js

@@ -5,6 +5,7 @@ const roboto = Roboto({
   style: 'italic',
   display: 'swap',
   preload: true,
+  subsets: ['vietnamese'],
 })
 
 export default function Component() {

test/e2e/next-font/index.test.ts

@@ -303,7 +303,7 @@ describe('@next/font/google', () => {
       expect($('link[as="font"]').get(1).attribs).toEqual({
         as: 'font',
         crossorigin: 'anonymous',
-        href: '/_next/static/media/4f3dcdf40b3ca86d.p.woff2',
+        href: '/_next/static/media/675c25f648fd6a30.p.woff2',
         rel: 'preload',
         type: 'font/woff2',
       })

test/unit/google-font-loader.test.ts

@@ -85,6 +85,7 @@ describe('@next/font/google loader', () => {
         emitFontFile: jest.fn(),
         resolve: jest.fn(),
         fs: {} as any,
+        isServer: true,
       })
       expect(css).toBe('OK')
       expect(fetch).toHaveBeenCalledTimes(1)
@@ -105,6 +106,7 @@ describe('@next/font/google loader', () => {
         emitFontFile: jest.fn(),
         resolve: jest.fn(),
         fs: {} as any,
+        isServer: true,
       })
       expect(adjustFontFallback).toEqual({
         ascentOverride: '88.84%',
@@ -128,6 +130,7 @@ describe('@next/font/google loader', () => {
         emitFontFile: jest.fn(),
         resolve: jest.fn(),
         fs: {} as any,
+        isServer: true,
       })
       expect(adjustFontFallback).toEqual({
         ascentOverride: '80.28%',
@@ -151,6 +154,7 @@ describe('@next/font/google loader', () => {
         emitFontFile: jest.fn(),
         resolve: jest.fn(),
         fs: {} as any,
+        isServer: true,
       })
       expect(adjustFontFallback).toEqual({
         ascentOverride: '83.79%',
@@ -174,6 +178,7 @@ describe('@next/font/google loader', () => {
         emitFontFile: jest.fn(),
         resolve: jest.fn(),
         fs: {} as any,
+        isServer: true,
       })
       expect(css).toBe('')
       expect(fallbackFonts).toEqual(['system-ui', 'Arial'])
@@ -194,6 +199,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
               "Failed to fetch font  \`Alkalami\`.
@@ -210,6 +216,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(
         `"@next/font/google has no default export"`
@@ -225,6 +232,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(
         `"Unknown font \`Unknown Font\`"`
@@ -240,6 +248,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
               "Unknown weight \`123\` for font \`Inter\`.
@@ -256,6 +265,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
               "Missing weight for font \`Abel\`.
@@ -272,6 +282,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
               "Unknown style \`normal\` for font \`Molle\`.
@@ -288,6 +299,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
                       "Invalid display value \`invalid\` for font \`Inter\`.
@@ -304,6 +316,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(
         `"Axes can only be defined for variable fonts"`
@@ -319,6 +332,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(
         `"Font \`Lora\` has no definable \`axes\`"`
@@ -334,6 +348,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
               "Invalid axes value for font \`Inter\`, expected an array of axes.
@@ -350,6 +365,7 @@ describe('@next/font/google loader', () => {
           emitFontFile: jest.fn(),
           resolve: jest.fn(),
           fs: {} as any,
+          isServer: true,
         })
       ).rejects.toThrowErrorMatchingInlineSnapshot(`
               "Invalid axes value \`INVALID\` for font \`Roboto Flex\`.

test/unit/local-font-loader.test.ts

@@ -3,6 +3,7 @@ import loader from '@next/font/local/loader'
 describe('@next/font/local', () => {
   describe('generated CSS', () => {
     test('Default CSS', async () => {
+      // @ts-expect-error
       const { css } = await loader({
         functionName: '',
         data: [{ src: './my-font.woff2' }],
@@ -24,6 +25,7 @@ describe('@next/font/local', () => {
     })
 
     test('Weight and style', async () => {
+      // @ts-expect-error
       const { css } = await loader({
         functionName: '',
         data: [{ src: './my-font.woff2', weight: '100 900', style: 'italic' }],
@@ -47,6 +49,7 @@ describe('@next/font/local', () => {
     })
 
     test('Other properties', async () => {
+      // @ts-expect-error
       const { css } = await loader({
         functionName: '',
         data: [
@@ -81,6 +84,7 @@ describe('@next/font/local', () => {
   describe('Errors', () => {
     test('Not using default export', async () => {
       await expect(
+        // @ts-expect-error
         loader({
           functionName: 'Named',
           data: [],
@@ -96,6 +100,7 @@ describe('@next/font/local', () => {
 
     test('Missing src', async () => {
       await expect(
+        // @ts-expect-error
         loader({
           functionName: '',
           data: [],
@@ -111,6 +116,7 @@ describe('@next/font/local', () => {
 
     test('Invalid file extension', async () => {
       await expect(
+        // @ts-expect-error
         loader({
           functionName: '',
           data: [{ src: './font/font-file.abc' }],
@@ -126,6 +132,7 @@ describe('@next/font/local', () => {
 
     test('Invalid display value', async () => {
       await expect(
+        // @ts-expect-error
         loader({
           functionName: '',
           data: [{ src: './font-file.woff2', display: 'invalid' }],
@@ -142,6 +149,7 @@ describe('@next/font/local', () => {
 
     test('Invalid declaration', async () => {
       await expect(
+        // @ts-expect-error
         loader({
           functionName: '',
           data: [