现在ES6在前端开发中已经非常普及了，所以前端转向node开发还可以继续保持ES6写法，现在node对ES6语法友好度越来越高，下面我们开始搭建一个支持ES6写法的node项目。同时使用nodemon配置项目源码修改时自动重启服务。
首先要初始化一个项目
npm init
或
npm init -y先安装一个express（根据自己的需求选择web服务框架）
npm install express --save安装babel工具
npm install babel-cli --save-dev
npm install babel-plugin-transform-runtime --save-dev
npm install babel-preset-env --save-dev
npm install babel-preset-es2015 --save-dev
npm install babel-preset-latest --save-dev
npm install babel-register --save-dev安装@babel/runtime
npm install @babel/runtime --save安装 nodemon NODE项目代码修改时我们需要让项目自动编译更新
npm install nodemon --save-dev安装 “rimraf” 项目文件打包时需要删除上次打包的文件目录
npm install rimraf --save-devcross-env能跨平台地设置及使用环境变量
npm install cross-env --save下面我们配置一下package.json文件，在scripts中添加下面的代码
"build": "rimraf dist/ && babel ./ --out-dir dist/ --ignore ./node_modules,./.babelrc,./package.json,./npm-debug.log --copy-files",
"start": "cross-env NODE_ENV=development nodemon --harmony index-api.js"然后新建一个文件.babelrc，将下面的代码写进入
{
"presets": ["es2015"],
"plugins": ["transform-runtime"]
}到此基本的配置已经完成了，下面建立一个服务器文件 app.js
import express from 'express'
const app = express()
app.listen(3000, function() {
console.log('服务器启动成功！')
})此时如果急用node命令启动app.js会出现错误，因为import模块引入命令node不认，所以要用一个中间页面做一下过渡
新建一个index.js
require('babel-register') ({
presets: [ 'env' ]
})
require('./app.js')此时用npm start index.js启动项目（用node命令直接启动index.js文件也不会报错了）
下面我把我项目中的配置贴出来仅供大家参考
package.json文件
{
"name": "node-api",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"build": "rimraf dist/ && babel ./ --out-dir dist/ --ignore ./node_modules,./.babelrc,./package.json,./npm-debug.log --copy-files",
"start": "cross-env NODE_ENV=development nodemon --harmony index.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"@babel/runtime": "^7.4.2",
"cookie-parser": "^1.4.4",
"cross-env": "^5.2.0",
"express": "^4.16.4",
"express-session": "^1.15.6",
"mysql": "^2.16.0",
"node-uuid": "^1.4.8"
},
"devDependencies": {
"babel-cli": "^6.26.0",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-env": "^1.7.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-latest": "^6.24.1",
"babel-register": "^6.26.0",
"nodemon": "^1.18.10",
"rimraf": "^2.6.3"
}
}
.babelrc
{
"presets": ["es2015"],
"plugins": ["transform-runtime"]
}app.js
import express from 'express'
import router from './router/index.js'
import bodyParser from 'body-parser'
import cookieParser from 'cookie-parser'
import session from 'express-session';
const app = express();
app.set('port', process.env.PORT || 200); // 设定监听端口
app.all('*', (req, res, next) => {
const { origin, Origin, referer, Referer } = req.headers;
const allowOrigin = origin || Origin || referer || Referer || '*';
res.header("Access-Control-Allow-Origin", allowOrigin);
res.header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With");
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
res.header("Access-Control-Allow-Credentials", true); //可以带cookies
res.header("X-Powered-By", 'Express');
if (req.session) {
console.log('进入')
}
if (req.method == 'OPTIONS') {
res.sendStatus(200);
} else {
next();
}
});
app.use(express.static('./view'));
app.use(bodyParser.json({limit: '1mb'})); // 这里指定参数使用 json 格式
app.use(cookieParser()); // 挂载cookie
app.set('trust proxy', 1)
app.use(session({
secret: 'keyboardcat',
name: 'token', //这里的name值得是cookie的name，默认cookie的name是：connect.sid
rolling: true,
cookie: {maxAge: 60 * 60 * 1000 , httpOnly:true}, //设置maxAge是80000ms，即80s后session和相应的cookie失效过期
resave: true,
saveUninitialized: false
}));
router(app);
app.listen(app.get('port'), () => {
console.log(`服务端口：${app.get('port')}`)
})index.js
require('babel-register') ({
presets: [ 'env' ]
})
require('./app.js')到此就结束了，这是我项目中最基本的配置