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fix: fallback generated locale type to string #3107

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5 changes: 3 additions & 2 deletions src/gen.ts
Original file line number Diff line number Diff line change
Expand Up @@ -156,7 +156,8 @@ export function generateI18nTypes(nuxt: Nuxt, options: NuxtI18nOptions) {
const vueI18nTypes = options.types === 'legacy' ? ['VueI18n'] : ['ExportedGlobalComposer', 'Composer']
const generatedLocales = simplifyLocaleOptions(nuxt, options)
const resolvedLocaleType = typeof generatedLocales === 'string' ? 'Locale[]' : 'LocaleObject[]'
const localeCodeStrings = getNormalizedLocales(options.locales).map(x => x.code)
const localeCodeStrings = getNormalizedLocales(options.locales).map(x => JSON.stringify(x.code))
const narrowedLocaleType = localeCodeStrings.join(' | ') || 'string'

const i18nType = `${vueI18nTypes.join(' & ')} & NuxtI18nRoutingCustomProperties<${resolvedLocaleType}>`

Expand Down Expand Up @@ -191,7 +192,7 @@ declare module 'vue-i18n' {
declare module '@intlify/core-base' {
// generated based on configured locales
interface GeneratedTypeConfig {
locale: ${localeCodeStrings.map(x => JSON.stringify(x)).join(' | ')}
locale: ${narrowedLocaleType}
}
}

Expand Down