trailer-website-koa 项目笔记

node支持import语法

1. 安装插件 npm i babel-cli babel-preset-env -D
2. 添加配置文件 .babelrc

{
  "presets": [
    [
      "env",
      {
        "targets": {
          "node": "current"
        }
      }
    ]
  ]
}

3. package.json文件添加配置

"scripts": {
    "dev":"nodemon -w src --exec \"babel-node src --presets env\"", // 监测src文件夹下的
    "test": "echo \"Error: no test specified\" && exit"
  },

node@8.x 新增的工具模块

import {promisify} from 'util' // promisify 序列化一个promise

生产环境支持ES6/7

1. 安装依赖
   npm i -S babel-plugin-transform-runtime babel-runtime -D
2. 修改配置

 {
 "presets": [
   [
     "env",
     {
       "targets": {
         "node": "current"
       }
     }
   ]
 ],
 "plugins": [
   [
     "transform-runtime",
     {
       "polyfill": false,
       "regeneratoe": true
     }
   ]
 ]
}

3. package.json文件添加配置

  "scripts": {
    "dev": "nodemon -w src --exec \"babel-node src --presets env\"",
    "build": "rimraf dist && babel src -s -D -d dist --presets env",
    "production": "nodemon dist",
    "test": "echo \"Error: no test specified\" && exit"
  },

koa 核心概念