With the introduction of arrow function you won't need to use .bind(this) as arrow functions capture in their lexical scope the variables/keywords: this, arguments, super.

e.g.

setTimeout(function(){alert(this.a)}.bind(this));

becomes simply

setTimeout(() => alert(this.a));

Yes, maybe my comment wasn't clear. I meant to say add ".bind(this)" as a case that is replaced by => just like "var self = this;" or (...)(); for that matter.

There is a proposal for a :: bind operator.

1. a unary :: operator for binding methods to their objects: `foo.then(::console.log)`

2. a binary :: operator for chaining: `x(a)::y(b)` (equivalent to `y.call(x(a), b)`)