Chaining JavaScript Functions

javascript_chain_functions.js

const log = console.log

const is = (x) => {
  return {
    plus: (plus) => {
      return is(x + plus)
    },
    ten: () => {
      return (x === 10)
    },
    minus: (minus) => {
      return is(x - minus)
    }
  }
}

log(is(5).plus(5).ten())
log(is(5).plus(5).plus(1).ten())
log(is(10).ten())
log(is(11).minus(1).ten())