fix: add defaultLocale property

playground/pages/about/index.vue

@@ -8,6 +8,7 @@ export default defineComponent({
     console.log('$i18n.getBrowserLocale', this.$i18n.getBrowserLocale())
     console.log('$i18n.getLocaleCookie', this.$i18n.getLocaleCookie())
     console.log('$i18n.localeProperties', this.$i18n.localeProperties)
+    console.log('$i18n.defaultLocale', this.$i18n.defaultLocale)
   },
   computed: {
     availableLocales() {

playground/pages/index.vue

@@ -5,7 +5,7 @@ import { computed } from 'vue'
 import { LocaleObject } from '#i18n'
 
 const route = useRoute()
-const { t, strategy, locale, locales, localeProperties, setLocale, finalizePendingLocaleChange } = useI18n()
+const { t, strategy, locale, locales, localeProperties, setLocale, defaultLocale, finalizePendingLocaleChange } = useI18n()
 const localePath = useLocalePath()
 const switchLocalePath = useSwitchLocalePath()
 const getRouteBaseName = useRouteBaseName()

src/runtime/plugins/i18n.ts

@@ -219,6 +219,7 @@ export default defineNuxtPlugin(async nuxt => {
           )
         }
         composer.differentDomains = differentDomains
+        composer.defaultLocale = defaultLocale
         composer.getBrowserLocale = () => _getBrowserLocale(nuxtI18nInternalOptions, nuxt.ssrContext)
         composer.getLocaleCookie = () =>
           _getLocaleCookie(nuxt.ssrContext, { ...nuxtI18nOptions.detectBrowserLanguage, localeCodes })
@@ -268,6 +269,11 @@ export default defineNuxtPlugin(async nuxt => {
               return g.differentDomains
             }
           },
+          defaultLocale: {
+            get() {
+              return g.defaultLocale
+            }
+          },
           getBrowserLocale: {
             get() {
               return () => Reflect.apply(g.getBrowserLocale, g, [])
@@ -330,6 +336,11 @@ export default defineNuxtPlugin(async nuxt => {
               return composer.differentDomains
             }
           },
+          defaultLocale: {
+            get() {
+              return composer.defaultLocale
+            }
+          },
           getBrowserLocale: {
             get() {
               return () => Reflect.apply(composer.getBrowserLocale, composer, [])

src/runtime/server/dynamic.ts

@@ -107,6 +107,7 @@ async function precompileConfig(filename: string, messages: NonNullable<I18nOpti
  *  (we know use monorepo packages...)
  */
 
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
 function deepCopy(src: Record<string, any>, des: Record<string, any>, predicate?: (src: any, des: any) => boolean) {
   for (const key in src) {
     if (isObject(src[key])) {
@@ -127,7 +128,7 @@ function deepCopy(src: Record<string, any>, des: Record<string, any>, predicate?
 export function getNeedPrecompileMessages(messages: NonNullable<I18nOptions['messages']>) {
   const needPrecompileMessages: NonNullable<I18nOptions['messages']> = {}
   // ignore, if messages will have function
-  const predicate = (src: any) => !isFunction(src)
+  const predicate = (src: any) => !isFunction(src) // eslint-disable-line @typescript-eslint/no-explicit-any
 
   for (const [locale, message] of Object.entries(messages)) {
     const dest = (needPrecompileMessages[locale] = {})

src/runtime/types.d.ts

@@ -53,6 +53,10 @@ export interface ComposerCustomProperties {
    * Default direction as specified in options.
    */
   defaultDirection: Directions
+  /**
+   * Default locale as specified in options.
+   */
+  defaultLocale: Locale
   /**
    * Switches locale of the app to specified locale code.
    *
@@ -133,6 +137,10 @@ export interface NuxtI18nRoutingCustomProperties {
    * Default direction as specified in options.
    */
   readonly defaultDirection: Directions
+  /**
+   * Default locale as specified in options.
+   */
+  readonly defaultLocale: Locale
   /**
    * Switches locale of the app to specified locale code.
    *

src/transform/dynamic.ts

@@ -100,6 +100,7 @@ export const ResourceDynamicPlugin = createUnplugin((options: ResourceDynamicPlu
           return
         }
 
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
         const resources = [...resoucesMap].reduce((obj, [_, { hash, type, locale, ref }]) => {
           obj[hash] = { hash, type, locale, path: this.getFileName(ref) }
           return obj