JSONP with Promises

jsonp-promise.js

const TIMEOUT = 10000;
function jsonp(url) {
  return new Promise((resolve, reject) => {

    let callbackName = 'jsonpCallback';
    let timeoutTrigger = window.setTimeout(function(){
      window[callbackName] = Function.prototype;
      reject(new Error('Timeout'));
    }, TIMEOUT);

    window[callbackName] = function(data){
      window.clearTimeout(timeoutTrigger);
      resolve(data);
    };

    let script = document.createElement('script');
    script.type = 'text/javascript';
    script.async = true;
    script.src = url;

    document.getElementsByTagName('head')[0].appendChild(script);

  });
}
export default jsonp;

// usage:
// jsonp('http://www.colourlovers.com/api/palettes/top?jsonCallback=jsonpCallback')
//   .then(console.debug.bind(console, 'success'), console.error.bind(console, 'error'))