The use of babel-cli in the project

1. Project initialization

npm init

1. Install babel in the project

npm install babel-cli --save-dev

1. Install related babel plugins

# babel-preset-xxxxxx
npm install babel-preset-es2015 --save-dev

1. Rewrite package.json

# src:源目录；lib:目标目录
{
  "devDependencies": {
    "babel-cli": "^6.0.0"
  },
  "scripts": {
    "build": "babel src -d lib"
  },
}

1. The configuration file in the root directory. babelrc

# presets：转码规则，plugins:插件
{
    "presets": [],
    "plugins": []
}

1. transcoding

The src transcoded file is under lib

npm run build