JS:fetchRetry

fetchRetry.js

var fetchRetry = (url, attempts) => {
  return new Promise((resolve, reject) => {
      var wrappedFetch = (triedAttempts) => {
          console.log('Try fetch, attempts left: ' + triedAttempts);
          fetch(url).then((response) => {
              resolve(response);
          })
          .catch((err) => {
              if(triedAttempts > 0) {
                 setTimeout(() => {
                     wrappedFetch(--triedAttempts);
                 }, 1000); 
              } else {
                  resolve('Attempts Exceeded, check you connection.');
              }
          });
      };
      wrappedFetch(attempts);
  });
};

// Example use.
fetchRetry('http://example.com/api.json', 5).then((res) => {
  console.log(res);
});