title: Is ES6 `export class A` equivalent to `module.exports = A`?
body: <p>When I see the compiled code by Babel, they do not seem to be equivalent.
  Actually, the former transforms to <code>exports.A = A</code>, which is not equivalent to <code>module.exports = A</code> (Maybe it is <code>module.exports.A = A</code>?)</p>
  
  <p>So is there an ES6 style <code>module.export =</code>? Or the syntax remains still in ES6? Or that syntax is no more recommended in ES6?</p>