recursive-promise.js

let getData = (url) => {
  return new Promise((resolve, reject) => {
    let data = {items: [{id: parseInt(Math.random() * 100000)},
                {id: parseInt(Math.random() * 100000)}]};
    console.log(1);
    if(data.items[0].id % 4 != 0)
      data.nextPage = url;
    resolve(data);
    
  });
}

let recursive = (url, A = []) => {
  return new Promise((resolve, reject) => {
    getData(url).then((data) => {
      A = A.concat(data.items);
      if(data.nextPage) {
        resolve(recursive(data.nextPage, A));
      }
      else {
        resolve(A);
      }
    });
  });
}

recursive('sales/customers').then((data) => {
  console.log(data);
});