--save-dev与--save的区别

-save-dev 是指将包信息添加到 package.json 里的 devDependencies节点，表示开发时依赖的包。 -save 是指将包信息添加到 package.json 里的dependencies节点，表示发布时依赖的包。

（当使用npm install --production的时候，只会安装dependencies:{***}中的项目)

{ "dependencies": {
    "vue": "^2.2.1"
  }, "devDependencies": {
    "babel-core": "^6.0.0",
    "babel-loader": "^6.0.0",
    "babel-preset-latest": "^6.0.0",
    "cross-env": "^3.0.0",
    "css-loader": "^0.25.0",
    "file-loader": "^0.9.0",
    "vue-loader": "^11.1.4",
    "vue-template-compiler": "^2.2.1",
    "webpack": "^2.2.0",
    "webpack-dev-server": "^2.2.0"
  }
}