chain functions like jQuery

chain.js

const chain = {
  first: () => {
    console.log(1);
    return chain;
  },
  third: function() { // cant use fat arrow, binds this
    console.log(3);
    return this;
  },
  second: () => {
    console.log(2);
    return chain;
  },
}

chain.first().second().third();