Symbols created with `Symbol.for` don't pollute any of those things, either.

  let x = Symbol.for("omghax");
  let foo = Object.create(null)
  foo[x] = 'bar';
  Object.keys(foo).length // returns 0

there was already a solution for that: .style in dom elements. it is a place where you dump style properties ad-nausea.

Why not simply add a single new property to Object? It would do the very same thing, would not change the language. it would be readily available to all browsers if you just added that single new key in your logic as you already do with .style and others, and everyone would move on with their lives.

I have to agree this is a duct tape by people thinking they know language design. Now i will have to wait until all browsers have this before i can use. and then i will still have to worry about older browsers (oh android, the IE6 of moment). Not to mention the time browser developers would waste actually improving things will be wasted on that syntax sugar.