const obj = {
  value: 42,
  getValue: function() {
    return this.value;
  }
};

const unboundGetValue = obj.getValue;
const boundGetValue = unboundGetValue.bind(obj);
const boundTwice = boundGetValue.bind({ value: 100 });

console.log(
  boundGetValue(),
  boundTwice(),
  unboundGetValue.call({ value: 7 }),
  obj.getValue.apply({ value: 99 })
);