[Nitro/Apphosting] Json are loaded but are not applied

[Vloz]

Hello,

Json files are correctly applied client-side in my nuxt dev environement but once i deploy to Firebase AppHosting (using nitro) the Json are indeed loaded but got never applied to the page (without any error)

Example here

• /_locales/index/en/data.json?v=1760183692590
• /_locales/general/en/data.json?v=1760183692590
  (content-type of the json are set to 'text/html', i dont know if this related)

Nuxt build show no error:

| [info] [nitro] Initializing prerenderer
  | [warn] "firebase-functions/logger" is imported by "functions/src/utils/warcraftlogs.api.ts", but could not be resolved – treating it as an external dependency.
  | [warn] "firebase-functions" is imported by "functions/src/handlers/processGuildProgress.ts", but could not be resolved – treating it as an external dependency.
  | [info] [nitro] Prerendering 36 routes
  | [log] [nitro]   ├─ /_locales/general/fr/data.json (19ms)
  | [log] [nitro]   ├─ /_locales/dev-test/en/data.json (19ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/en/data.json (20ms)
  | [log] [nitro]   ├─ /_locales/index/en/data.json (17ms)
  | [log] [nitro]   ├─ /_locales/general/en/data.json (17ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/fr/data.json (18ms)
  | [log] [nitro]   ├─ /_locales/dev-test/fr/data.json (18ms)
  | [log] [nitro]   ├─ /_locales/index/fr/data.json (17ms)
  | [log] [nitro]   ├─ /_locales/index/de/data.json (8ms)
  | [log] [nitro]   ├─ /_locales/dev-test/de/data.json (8ms)
  | [log] [nitro]   ├─ /_locales/general/de/data.json (7ms)
  | [log] [nitro]   ├─ /_locales/index/es/data.json (9ms)
  | [log] [nitro]   ├─ /_locales/dev-test/es/data.json (8ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/de/data.json (9ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/es/data.json (9ms)
  | [log] [nitro]   ├─ /_locales/general/es/data.json (8ms)
  | [log] [nitro]   ├─ /_locales/index/it/data.json (7ms)
  | [log] [nitro]   ├─ /_locales/dev-test/it/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/it/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/general/it/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/dev-test/pt/data.json (5ms)
  | [log] [nitro]   ├─ /_locales/index/pt/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/general/pt/data.json (5ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/pt/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/index/ru/data.json (7ms)
  | [log] [nitro]   ├─ /_locales/dev-test/ru/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/ru/data.json (14ms)
  | [log] [nitro]   ├─ /_locales/general/ru/data.json (14ms)
  | [log] [nitro]   ├─ /_locales/index/zh/data.json (14ms)
  | [log] [nitro]   ├─ /_locales/dev-test/zh/data.json (14ms)
  | [log] [nitro]   ├─ /_locales/general/zh/data.json (15ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/zh/data.json (14ms)
  | [log] [nitro]   ├─ /_locales/index/ko/data.json (6ms)
  | [log] [nitro]   ├─ /_locales/dev-test/ko/data.json (4ms)
  | [log] [nitro]   ├─ /_locales/entryPointId-zoneSlug/ko/data.json (5ms)
  | [log] [nitro]   ├─ /_locales/general/ko/data.json (4ms)
  | [info] [nitro] Prerendered 36 routes in 1.985 seconds
  | [success] [nitro] Generated public .output/public
  | [log] [nuxt-i18n-micro] Translations copied successfully to /workspace/locales directory
  | [info] [nitro] Building Nuxt Nitro server (preset: `firebase-app-hosting`, compatibility date: `2025-07-15`)
   ...
  | ├─ .output/server/chunks/raw/de.mjs.map (94 B) (98 B gzip)
  | ├─ .output/server/chunks/raw/de2.mjs (100 B) (117 B gzip)
  | ├─ .output/server/chunks/raw/de2.mjs.map (95 B) (99 B gzip)
  | ├─ .output/server/chunks/raw/de3.mjs (2.45 kB) (1.1 kB gzip)
  | ├─ .output/server/chunks/raw/de3.mjs.map (95 B) (99 B gzip)
  | ├─ .output/server/chunks/raw/de4.mjs (355 B) (293 B gzip)
  | ├─ .output/server/chunks/raw/de4.mjs.map (95 B) (99 B gzip)
  | ├─ .output/server/chunks/raw/en.mjs (99 B) (116 B gzip)
  | ├─ .output/server/chunks/raw/en.mjs.map (94 B) (97 B gzip)
  | ├─ .output/server/chunks/raw/en2.mjs (100 B) (117 B gzip)
  | ├─ .output/server/chunks/raw/en2.mjs.map (95 B) (99 B gzip)
  | ├─ .output/server/chunks/raw/en3.mjs (2.17 kB) (928 B gzip)
  | ├─ .output/server/chunks/raw/en3.mjs.map (95 B) (98 B gzip)
  | ├─ .output/server/chunks/raw/en4.mjs (305 B) (253 B gzip)
  | ├─ .output/server/chunks/raw/en4.mjs.map (95 B) (99 B gzip)

nuxt.config.ts

  modules: ['@nuxtjs/tailwindcss', '@nuxtjs/google-fonts', ['unplugin-icons/nuxt', {}], 'nuxt-i18n-micro'],
  i18n: {
    locales: [
      //'en' | 'de' | 'fr' | 'zh' | 'ko' | 'es' | 'pt' | 'it' | 'ru'
      { code: 'en', iso: 'en-US', dir: 'ltr' },
      { code: 'fr', iso: 'fr-FR', dir: 'ltr' },
      { code: 'de', iso: 'de-DE', dir: 'ltr' },
      { code: 'es', iso: 'es-ES', dir: 'ltr' },
      { code: 'it', iso: 'it-IT', dir: 'ltr' },
      { code: 'pt', iso: 'pt-PT', dir: 'ltr' },
      { code: 'ru', iso: 'ru-RU', dir: 'ltr' },
      { code: 'zh', iso: 'zh-CN', dir: 'ltr' },
      { code: 'ko', iso: 'ko-KR', dir: 'ltr' }
    ],
    strategy: 'prefix_except_default',
    defaultLocale: 'en',
    translationDir: 'locales',
    meta: true,
    metaBaseUrl: 'https://pullnext.eu',
  },
vite: {
    plugins: [
       viteCompression({
        algorithm: 'gzip',
      }),
      viteCompression({
        algorithm: 'brotliCompress',
        ext: '.br'
      }),
      ViteComponents({
        resolvers: [
          IconsResolver({
            prefix: '',
            strict: true
          })
        ],
        dts: true
      })
    ]
  }

I dont know where to seek.

Thanks for any help and for this great library.

[s00d]

Hi, try version v1.103.0.

I’ve added a header to the response - not sure if it will help, I suspect the issue is something else.
But the header should now be set to JSON.

[Vloz]

After further investigation it was on my hand a bad combo of viteCompression + a custom plugin that were doing double compression on static json assets. 😣
Sorry for the inconvenience. 🙏