colmo-admin/babel.config.js

module.exports = {
  presets: [
    // https://github.com/vuejs/vue-cli/tree/master/packages/@vue/babel-preset-app
    // '@vue/cli-plugin-babel/preset',
    // 之前一直报错说core.js 把上面这句话改为下面的就可以了
    ['@vue/cli-plugin-babel/preset', { useBuiltIns: 'entry' }]
  ],
  'env': {
    'development': {
      // babel-plugin-dynamic-import-node plugin only does one thing by converting all import() to require().
      // This plugin can significantly increase the speed of hot updates, when you have a large number of pages.
      // https://panjiachen.github.io/vue-element-admin-site/guide/advanced/lazy-loading.html
      'plugins': ['dynamic-import-node']
    }
  }
}