import express from 'express'; ^^^^^^^ SyntaxError: Unexpected identifier at Module.

安装express时遇到这个问题，原因是express不支持ES6语法，需要安装babel

命令

npm install --save-dev babel-cli babel-preset-env

安装完之后创建 .babelrc 文件

创建完之后加入

{"presets" : ["env"]
}

修改package.json文件

修改这一处

{"name": "backend","version": "1.0.0","description": "","main": "server.js","scripts": {"test": "echo \"Error: no test specified\" && exit 1","start": "nodemon --exec babel-node -- ./server.js"},"keywords": [],"author": "","license": "ISC","dependencies": {"express": "^4.17.1"},"devDependencies": {"babel-cli": "^6.26.0","babel-preset-env": "^1.7.0","nodemon": "^1.19.1"}
}

npm run start

import express from 'express'; ^^^^^^^ SyntaxError: Unexpected identifier at Module._com

最新文章

热门文章