vue3+vite配置 unplugin-vue-component 找不到 Vant 组件的问题

使用 vue3 + vite + Vant 搭建移动端项目，为了避免全量引入 vant 导致打包体积过大，又不想一个一个组件手动导入，所以就选择了 vant 官方推荐的方法，使用 unplugin-vue-components 插件自动引入组件，并按需引入组件的样式。
但是运行过程中遇到了报错：[vite] Internal server error: Failed to resolve import "vant/es" from "xxx"

vue3 + vite

项目依赖

package.json

{"name": "vue3-demo","private": true,"version": "1.0.0","type": "module","scripts": {"dev": "vite --host","build": "vue-tsc && vite build","preview": "vite preview","git": "tive git -c tive.git.config.cjs","lint": "eslint --ext .js,.jsx,.ts,.tsx --fix --quiet ./src","lint:stylelint": "stylelint --cache --fix \"src/**/*.{less,css,scss}\" --cache --cache-location node_modules/.cache/stylelint/","prepare": "husky install"},"dependencies": {"amfe-flexible": "^2.2.1","axios": "^1.4.0","lib-flexible": "^0.3.2","pinia": "^2.0.35","vant": "^4.3.1","vue": "^3.2.47","vue-router": "4.0.1"},"devDependencies": {"@types/node": "^20.1.0","@typescript-eslint/eslint-plugin": "^5.59.2","@typescript-eslint/parser": "^5.59.2","@vitejs/plugin-vue": "^4.1.0","typescript": "^5.0.2","unplugin-vue-components": "^0.24.1","vite": "^4.3.2","vite-plugin-compression": "^0.5.1","vite-plugin-eslint": "^1.8.1","vite-plugin-style-import": "^2.0.0","vue-eslint-parser": "^9.2.1","vue-tsc": "^1.4.2"},"lint-staged": {"*.{js,jsx,tsx,ts}": ["npm run lint","npm run lint:stylelint"]}
}

完整报错

  Plugin: vite-plugin-eslintFile: /Users/tiven/Desktop/dev/yc-chat-mbi/src/components/Footer.vue
2:47:05 PM [vite] Internal server error: Failed to resolve import "vant/es" from "src/components/Footer.vue". Does the file exist?Plugin: vite:import-analysisFile: /Users/tiven/Desktop/dev/yc-chat-mbi/src/components/Footer.vue:1:891  |  /* unplugin-vue-components disabled */import { Field as __unplugin_components_1 } from 'vant/es';import 'vant/es/field/style/index';|                                                                                          ^2  |  import { Button as __unplugin_components_0 } from 'vant/es';import 'vant/es/button/style/index';3  |  import { defineComponent as _defineComponent } from "vue";

vite.config.ts 配置如下：

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import eslintPlugin from 'vite-plugin-eslint'
import path from 'node:path'
import viteCompression from 'vite-plugin-compression'
import postCssPxToRem from 'postcss-pxtorem'
import Components from 'unplugin-vue-components/vite'
import { VantResolver } from 'unplugin-vue-components/resolvers'// https://vitejs.dev/config/
export default defineConfig({resolve: {// 在导入模块时，如果模块路径不包含文件扩展名，则会尝试添加下面这些扩展名extensions: ['.js', '.ts', '.jsx', '.tsx', '.json', '.vue'],// 在导入模块时，如果模块路径以 / 开头，则会尝试在下面这些目录中查找该模块alias: {'@': path.resolve(__dirname, './src'),'@img': path.resolve(__dirname, './src/assets/img'),},},build: {sourcemap: false,minify: 'terser',assetsInlineLimit: 4096,reportCompressedSize: false,rollupOptions: {output: {// 最小化拆分包manualChunks(id) {if (id.includes('node_modules')) {return id.toString().split('node_modules/')[1].split('/')[0].toString()}},chunkFileNames: 'assets/js/[name].[hash].js', // 用于命名代码拆分时创建的共享块的输出命名，[name]表示文件名,[hash]表示该文件内容hash值},// external: ['antd'],},terserOptions: {compress: {drop_console: true,drop_debugger: true,},},},plugins: [vue(),Components({resolvers: [VantResolver()],}),eslintPlugin({include: ['src/**/*.ts', 'src/**/*.vue', 'src/*.ts', 'src/*.vue'],}),viteCompression({threshold: 1024 * 4,}),],css: {postcss: {plugins: [postCssPxToRem({rootValue: 37.5, //1rem的大小propList: ['*'], //需要转换的属性selectorBlackList: ['.norem'], //过滤掉不需要转换的类名}),],},},
})

解决办法

修改 vite.config.ts 下的 resolve.extensions 参数配置，加入 .mjs 拓展名即可解决。

export default defineConfig({resolve: {// 在导入模块时，如果模块路径不包含文件扩展名，则会尝试添加下面这些扩展名extensions: ['.mjs', '.js', '.ts', '.jsx', '.tsx', '.json', '.vue'],// 在导入模块时，如果模块路径以 / 开头，则会尝试在下面这些目录中查找该模块alias: {'@': path.resolve(__dirname, './src'),'@img': path.resolve(__dirname, './src/assets/img'),},},
})