NodeJS Chaining Using Promises

nodejs-chaining-promises.js

var foo = function (arg) {
     return new Promise((resolve, reject) => {
          resolve(arg+1);
     });
}

var bar = function (arg) {
     return new Promise((resolve, reject) => {
          resolve(arg+2);
     });
}

var baz = function (arg) {
     return new Promise((resolve, reject) => {
          resolve(arg+3);
     });
}

var log = function (arg) {
      console.log(arg);    
}

foo(0)
     .then(bar)
     .then(baz)
     .then(log);