nekman/JSONP.js

## JSONP.js
/*
 * From http://stackoverflow.com/a/22780569/141363 modified
 * to return Promise.
 *
 * Usage: jsonp(url)
 *          .then(success)
 *          .catch(error);
 */
var jsonp = (function(global, body) {
  'use strict';

  // Uses native Promise. Older browsers + IE11 and Safari 7 (!) need polyfill.
  if (!global.Promise) {
    throw 'Promise not available. Use a polyfill! http://promisesaplus.com/implementations';
  }

  return function(url) {
    return new Promise(function(resolve, reject) {
      var callbackName = 'jsonp_callback_' + Math.round(100000 * Math.random()),
          script = createScript(url, callbackName);

      // If we fail to get the script, reject the promise.
      script.onerror = reject;

      body.appendChild(script);
      // If the url contains a 'something_callback=?' then
      // replace the '?' with our random generated callbackName.
      if (/callback=?/.test(url)) {
        url = url.replace('=?', '=' + callbackName);
      }

      global[callbackName] = function(data) {
          // Script inserted, resolve promise.
          resolve(data);

          // Clean up.
          global[callbackName] = null;
          delete global[callbackName];
          body.removeChild(script);
      };
    });
  };

  function createScript(url, callbackName) {
    var script = document.createElement('script');
    script.src = url + (url.indexOf('?') >= 0 ? '&' : '?') + 'callback=' + callbackName;

    return script;
  }

}(this, document.body));
	/*
	* From http://stackoverflow.com/a/22780569/141363 modified
	* to return Promise.
	*
	* Usage: jsonp(url)
	* .then(success)
	* .catch(error);
	*/
	var jsonp = (function(global, body) {
	'use strict';

	// Uses native Promise. Older browsers + IE11 and Safari 7 (!) need polyfill.
	if (!global.Promise) {
	throw 'Promise not available. Use a polyfill! http://promisesaplus.com/implementations';
	}

	return function(url) {
	return new Promise(function(resolve, reject) {
	var callbackName = 'jsonp_callback_' + Math.round(100000 * Math.random()),
	script = createScript(url, callbackName);

	// If we fail to get the script, reject the promise.
	script.onerror = reject;

	body.appendChild(script);
	// If the url contains a 'something_callback=?' then
	// replace the '?' with our random generated callbackName.
	if (/callback=?/.test(url)) {
	url = url.replace('=?', '=' + callbackName);
	}

	global[callbackName] = function(data) {
	// Script inserted, resolve promise.
	resolve(data);

	// Clean up.
	global[callbackName] = null;
	delete global[callbackName];
	body.removeChild(script);
	};
	});
	};

	function createScript(url, callbackName) {
	var script = document.createElement('script');
	script.src = url + (url.indexOf('?') >= 0 ? '&' : '?') + 'callback=' + callbackName;

	return script;
	}

	}(this, document.body));