ie11 error when using razzle+ts+react-loadable (help needed)

[begoat]

I integrate react-loadable and typescript with razzle as the example does.
But when i test it in IE 11. unexpected error occurred.

1. bundle.61eb9c53.js Syntax error
   and this line leads to syntax error var ve=class extends r.Component
   It seems it didn't correctly transpile to es5 which IE 11 runs

2. the other error is Object doesn't support property or method 'main'

Here is the razzle.config.js

const { ReactLoadablePlugin } = require('react-loadable/webpack');

module.exports = {
  plugins: ['typescript'],
  modify: (config, { target }) => {
    if (target === 'web') {
      return {
        ...config,
        plugins: [
          ...config.plugins,
          new ReactLoadablePlugin({
            filename: './build/react-loadable.json',
          }),
        ],
      };
    }

    return config;
  },
};

Am i wrong?

I also tried adding "es2015" in .babelrc but it seems doesn't work,
could you give me a hand? Thanks in advance

Here is the mininal-demo-project

[begoat]

could anyone give some cules

[begoat]

In typescript plugin options: set useBabel: true, solving this problem.

At the beginning, i thought the error of webpack config cause this problem, but according to #437, it is right.