TypeError: X.prototype.y called on incompatible type

TypeError: 'this' is not a Set object (Edge)
TypeError: Function.prototype.toString called on incompatible object (Firefox)
TypeError: Function.prototype.bind called on incompatible target (Firefox)
TypeError: Method Set.prototype.add called on incompatible receiver undefined (Chrome)
TypeError: Bind must be called on a function (Chrome)

var mySet = new Set();
["bar", "baz"].forEach(mySet.add);
// mySet.add is a function, but "mySet" is not captured as this.
var myFun = function () {
  console.log(this);
};
["bar", "baz"].forEach(myFun.bind);
// myFun.bind is a function, but "myFun" is not captured as this.

var mySet = new Set();
["bar", "baz"].forEach(mySet.add.bind(mySet));
// This works due to binding "mySet" as this.
var myFun = function () {
  console.log(this);
};
["bar", "baz"].forEach((x) => myFun.bind(x));
// This works using the "bind" function. It creates a lambda forwarding the argument.