Thankyou mattias, I must find a way to use vue with pas2js classes, else it will not have much sense.
For example in that method I must call
reverseMessage: function () { this.message = this.message.split('').reverse().join('') }
Seems that in vue to any function the "this" is filled with the data, and maybe methods as well.
So in these method I must be able to use this, with the variables at least. I'm learning vue right now.