build: support Android 9 WebView

package.json

@@ -36,11 +36,13 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.31.0",
+    "@vitejs/plugin-legacy": "^7.2.1",
     "@vitejs/plugin-vue": "^6.0.1",
     "eslint": "^9.31.0",
     "eslint-plugin-vue": "~10.3.0",
     "globals": "^16.3.0",
     "sass-embedded": "^1.92.1",
+    "terser": "^5.49.0",
     "unplugin-vue-components": "^29.0.0",
     "vite": "^7.0.6",
     "vite-plugin-vue-devtools": "^8.0.0"

vite.config.js

@@ -1,14 +1,19 @@
 import vue from '@vitejs/plugin-vue'
+import legacy from '@vitejs/plugin-legacy'
 import Components from 'unplugin-vue-components/vite'
 
 import { defineConfig } from 'vite'
 import fs from 'node:fs'
 import path from 'node:path'
+import process from 'node:process'
 import { fileURLToPath, URL } from 'node:url'
 import { VantResolver } from 'unplugin-vue-components/resolvers'
 
 const PRODUCTION_LIKE_MODES = new Set(['production', 'production-atu'])
 const STRIPPABLE_CONSOLE_METHODS = ['log', 'debug', 'info']
+// Android 9 首发设备可能仍使用 Chrome 69 级别的 System WebView。
+// 显式锁定最低目标，避免 Vite 大版本升级后默认 target 再次抬高。
+const ANDROID_9_WEBVIEW_TARGETS = ['Chrome >= 69', 'ChromeAndroid >= 69']
 const LOCAL_OSS_MIME_TYPES = {
   '.gif': 'image/gif',
   '.jpg': 'image/jpeg',
@@ -319,6 +324,12 @@ export default defineConfig(({ mode }) => {
       Components({
         resolvers: [VantResolver()],
       }),
+      legacy({
+        // Chrome 69 已支持 ESM，只需要降级现代模块并补齐实际使用的 ES API。
+        modernTargets: ANDROID_9_WEBVIEW_TARGETS,
+        modernPolyfills: true,
+        renderLegacyChunks: false,
+      }),
       createBuildLogControlPlugin(stripDebugLogs),
     ],
     resolve: {
@@ -345,9 +356,6 @@ export default defineConfig(({ mode }) => {
           entryFileNames: 'js/[hash].js',
           chunkFileNames: 'js/[hash].js',
           assetFileNames: (assetInfo) => {
-            const info = assetInfo.name.split('.')
-            const ext = info[info.length - 1]
-
             if (/\.(css)$/.test(assetInfo.name)) {
               return 'css/[hash].[ext]'
             }