JavaScript Promises, road to async/await - https://codingblast.com/javascript-promise-async-await

Promise.js

function someFunction(value, error) {
 return new Promise(
  (resolve, reject) => {
   if (value) {
    resolve(value);
   } else {
    reject(error);
   }
  });
}

someFunction('CodingBlast').then((value) => {
 console.log(value);
});