Echo JS 0.11.0

Yep, always returns a new function, cause the component that uses the prop to rerender.
This approach just moves a problem around, changing its semantics, without actually solving the problem.

If you use babel anyway, the best way to go, IMO, is https://www.npmjs.com/package/autobind-decorator

If you want more, you can use https://www.npmjs.com/package/javascript-decorators