feat: add defaultLocale to replace default locale (#40)

README.md

@@ -58,6 +58,12 @@ eg. `{ lazyComponent: true }`
 
 Whether to automatically import styles.
 
+### defaultLocale
+
+- Type: `string`
+
+Replace default locale, you can find locale list [here](https://github.com/youzan/vant/tree/main/packages/vant/src/locale/lang).
+
 ### excludeExports
 
 - Type: `array`

playground/nuxt.config.ts

@@ -5,6 +5,7 @@ export default defineNuxtConfig({
   modules: [Vant],
   vant: {
     lazyload: true,
+    defaultLocale: 'en-US',
     imports: ['Locale', 'useCurrentLang']
   }
 })

src/core/index.ts

@@ -1,6 +1,7 @@
 export * from './components'
 export * from './imports'
 export * from './lazyload'
+export * from './localePlugn'
 export * from './options'
 export * from './styles'
 export * from './transformPlugin'

src/core/localePlugn.ts

@@ -0,0 +1,34 @@
+import { createUnplugin } from 'unplugin'
+import MagicString from 'magic-string'
+import type { NuxtOptions } from '@nuxt/schema'
+import { libraryName } from '../config'
+
+interface LocalePluginOptions {
+  sourcemap?: NuxtOptions['sourcemap']['client']
+  locale: string
+}
+
+export const localePlugin = createUnplugin((options: LocalePluginOptions) => {
+  return {
+    name: `${libraryName}:locale`,
+    enforce: 'pre',
+    transformInclude (id) {
+      const regExp = new RegExp(`${libraryName}/es/locale/index`)
+      return !!id.match(regExp)
+    },
+    transform (code, id) {
+      const s = new MagicString(code)
+
+      s.replaceAll('zh-CN', options.locale)
+
+      if (s.hasChanged()) {
+        return {
+          code: s.toString(),
+          map: options.sourcemap
+            ? s.generateMap({ source: id, includeContent: true })
+            : undefined
+        }
+      }
+    }
+  }
+})

src/module.ts

@@ -6,6 +6,7 @@ import {
   resolveLazyload,
   resolveOptions,
   resolveStyles,
+  localePlugin,
   transformPlugin
 } from './core/index'
 import type { Options } from './types'
@@ -36,6 +37,13 @@ export default defineNuxtModule<Partial<Options>>({
           transformStyles: name => resolveStyles(options, name)
         })
       )
+
+      if (options.defaultLocale && options.defaultLocale !== 'zh-CN') {
+        config.plugins.push(localePlugin.vite({
+          sourcemap: nuxt.options.sourcemap[mode],
+          locale: options.defaultLocale
+        }))
+      }
     })
 
     nuxt.hook('webpack:config', (configs) => {
@@ -51,6 +59,13 @@ export default defineNuxtModule<Partial<Options>>({
             transformStyles: name => resolveStyles(options, name)
           })
         )
+
+        if (options.defaultLocale && options.defaultLocale !== 'zh-CN') {
+          config.plugins.push(localePlugin.webpack({
+            sourcemap: nuxt.options.sourcemap[mode],
+            locale: options.defaultLocale
+          }))
+        }
       })
     })
   }

src/types.ts

@@ -27,6 +27,13 @@ export interface Options extends TransformOptions {
    * @default true
    */
   importStyle: boolean
+  /**
+   * Replace default locale, you can find locale list [here](https://github.com/youzan/vant/tree/main/packages/vant/src/locale/lang).
+   *
+   * @default 'zh-CN'
+   * @example 'en-US'
+   */
+  defaultLocale?: string
   /**
    * Exclude exports from Vant that are not component content.
    *