parcel打包react

{
  "name": "coupon",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "axios": "^0.17.1",
    "element-react": "^1.4.5",
    "element-theme-default": "^1.4.13",
    "react": "^16.2.0",
    "react-dom": "^16.2.0"
  },
  "devDependencies": {
    "babel-plugin-transform-object-rest-spread": "^6.26.0",
    "babel-preset-env": "^1.6.1",
    "babel-preset-react": "^6.24.1",
    "parcel-bundler": "^1.5.1"
  },
  "scripts": {
    "start": "parcel ./src/index.html",
    "build": "parcel build ./src/index.js -d ./build"
  }
}