babel.config.js

module.exports = {
    "presets": [
			["@vue/app",
			{
				useBuiltIns:"entry"
			}
		]
      // '@vue/babel-preset-app'
    ],
    "plugins": [
      [
        "component",
        {
          "libraryName": "element-ui",
          "style": false
        }
      ]
    ]
  }