zhangshme / rollup-babel-issue

issue-example

1. clone this repo
2. open index.html in browser

problem

issue

how to fix

babel({
  presets: ['@babel/env'],
  runtimeHelpers: true,
  plugins: [
    [
      '@babel/plugin-transform-runtime',
      {
        corejs: 3,
      },
    ],
  ],
+  exclude: [/runtime-corejs3/, /core-js/],
}),