I don't think javascript will ever be "fixed": it is as it is, if you change how hoisting works, you break everything. But: 1. You can solve that already in ES

I don't think javascript will ever be "fixed": it is as it is, if you change how hoisting works, you break everything. But: 1. You can solve that already in ES6, by returning fn from a function, also avoiding the global variable; 2. Your ES3 linter should warn you about the redefined variable.