babel-preset-es2015安装

npm install --save-dev babel-preset-es2

安装完成后项目目录下新建

vi .babelrc
{
  "presets": ["es2015","stage-0"],
  "plugins": [
    ["transform-runtime", {
      "polyfill": false,
      "regenerator": true
    }]
  ]
}

相关解释https://excaliburhan.com/post/babel-preset-and-plugins.html