vue3 报错Failed to parse source for import analysis because the content contains invalid JS syntax. Install @vitejs/plugin-vue to handle .vue files.

1. 安装@vitejs/plugin-vue

npm i @vitejs/plugin-vue

2. 重新npm install

npm i

3. 在根目录下加配置文件vite.config.js

// vite.config.js
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()]
})

5. 重新启动

npm run dev