Luis Sieira

MIT license is a copyright license as well. Even copy-left licenses are copyright licenses. Actually, the showdown licence is [a BSD license](https://opensource.org/licenses/BSD-3-Clause), which is compatible with MIT's

Did you find a good way to do it ?

Regarding the JSON.stringify, a workaround is to do this: ``` js var proxy = new Proxy(obj, { get: function(target, property, receiver) { if (property === 'toJSON') { return () =>...

I'll do the es_ES as soon as I find some time

+1