javascript - 当安装的节点 js 版本较高且应用程序使用旧版本时，如何运行节点 js 应用程序

Question

我对 Node js 比较陌生，并且正在研究 .NET MVC。当我尝试使用命令运行它时，node index它给了我以下错误。

H:\Services\src>node index
H:\Services\src\index.js:1
import app from './app';
^^^^^^

SyntaxError: Cannot use import statement outside a module
?[90m    at Module._compile (internal/modules/cjs/loader.js:895:18)?[39m
?[90m    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)?[39m
?[90m    at Module.load (internal/modules/cjs/loader.js:815:32)?[39m
?[90m    at Function.Module._load (internal/modules/cjs/loader.js:727:14)?[39m
?[90m    at Function.Module.runMain (internal/modules/cjs/loader.js:1047:10)?[39m
?[90m    at internal/main/run_main_module.js:17:11?[39m

下面是我的 package.json 文件。它说它使用的是节点版本 8.0.0 和 npm 版本 5.0.0。Bt 我安装的节点版本是 v12.14.0，NPM 安装的版本是 6.13.4。

{
  "name": "core",
  "version": "0.0.1",
  "description": "Core",
  "main": "dist/index.js",
  "engines": {
    "node": "8.0.0",
    "npm": "5.0.0"
  },
  "scripts": {
    "prestart": "npm run -s build",
    "start": "node dist/index.js",
    "dev": "nodemon src/index.js --exec \"node -r dotenv/config -r babel-register\" localdev",
    "clean": "rimraf dist && rimraf -p",
    "build": "npm run clean && mkdir -p dist && babel src -s -D -d dist",
    "test": "jest --watch",
    "lint": "esw -w src test"
  },
  "keywords": [
    "express",
    "babel",
    "es6",
    "es2015",
    "es2016",
    "es2017",
    "eslint"
  ],
  "author": "ABC",
  "license": "UNLICENSED",
  "dependencies": {
    "babel-cli": "6.26.0",
    "babel-plugin-transform-object-rest-spread": "6.26.0",
    "babel-preset-env": "1.6.1",
    "cors": "2.8.5",
    "express": "4.16.4",
    "js-yaml": "3.12.2",
    "mssql": "5.0.0",
    "winston": "3.1.0",
    "winston-daily-rotate-file": "3.5.1"
  },
  "devDependencies": {
    "babel-eslint": "7.2.3",
    "babel-jest": "21.0.2",
    "babel-register": "6.24.1",
    "dotenv": "4.0.0",
    "eslint": "4.10.0",
    "eslint-config-airbnb-base": "12.1.0",
    "eslint-plugin-import": "2.8.0",
    "eslint-plugin-jest": "21.0.2",
    "eslint-watch": "3.1.0",
    "nodemon": "1.18.10",
    "rimraf": "2.6.3"
  },
  "babel": {
    "presets": [
      [
        "env",
        {
          "targets": {
            "node": "current"
          }
        }
      ]
    ],
    "plugins": [
      "transform-object-rest-spread"
    ]
  },
  "eslintConfig": {
    "parser": "babel-eslint",
    "plugins": [
      "import",
      "jest"
    ],
    "parserOptions": {
      "ecmaVersion": 2017,
      "sourceType": "module"
    },
    "env": {
      "node": true,
      "jest": true
    },
    "extends": [
      "eslint:recommended"
    ]
  }
}

我为上述错误尝试了不同的谷歌解决方案，但每次都会根据我为解决问题而采取的步骤而出现差异错误。我只是想在本地运行此代码并对其进行测试。

提前致谢。

标签： javascriptnode.jsnpm