why does ts loader can't transifier export default xx to module.export?

[MrKou47]

I am writing a npm package which will running in node environment. and i find a problem.

if my ts code like:

class TestModule {}
export default TestModule;

this code will transifier to:

// transifier-index.js
// some code...
export.default = TestModule;

And then if i want to use this package like this:

const testModule = require('transifier-index.js');
console.log(testModule); // { default: [Function: TestModule] }
const obj = new testModule() // error: testModule is not a constructor

but if i write .ts file like this:

class TestModule {}
export = TestModule;

then i will get the current module.export:

// transifier-index.js
// some code...
module.export = TestModule;

Question: what't different between export = xxx and export default xxx? How can i transfer export default xxx to module.export =xxx?

some version info:

node: 7.7.1
webpack: 2.6.1
ts-loader: last version
tsc: 2.4.1

some config:

// tsconfig.json
{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "lib": ["es2015", "es2017", "dom"],
    "declaration": true,
    "declarationDir": "./wechat-pay-sdk",
    "strict": true,
    "noImplicitAny": false,
    "moduleResolution": "node",
    "experimentalDecorators": true
  },
  "include": [
    "./src"
  ],
  "exclude": [
    "node_modules"
  ]
}

// webpack.config.js
const webpack = require('webpack');
const path = require('path');

const config = {
  entry: path.join(__dirname, './src/index.ts'),
  output: {
    filename: 'index.js',
    path: path.join(__dirname, './lib'),
    libraryTarget: 'umd',
  },
  resolve: {
    extensions: ['.ts', '.tsx', '.js'],
  },
  externals: {
    md5: 'md5',
    url: 'url',
    request: 'request',
    xml2json: 'xml2json',
    js2xmlparser: 'js2xmlparser',
  },
  module: {
    loaders: [{
      test: /\.ts/,
      loaders: 'ts-loader',
      exclude: /node_modules/
    }]
  },
  target: 'node'
}

module.exports = config;

[HerringtonDarkholme]

This is TypeScript's design. Please read microsoft/TypeScript#15957

[mouday]

i don't get resolve about this solution