const JSONP = (url, options) => {

options = options || {};

url = options.url || url;

return new Promise((resolve, reject) => {

let timer = 0;

let script = document.createElement('script');

const callbackName = options.callbackName || `__jsonp_${Date.now()}_callback`;

url = url.replace('=?', `=${callbackName}${options.nocache ? ('&_=' + Date.now()) : ''}`);

const done = () => {

window.clearTimeout(timer);

try {document.head.removeChild(script);} catch (e) {}

window[callbackName] = null;

};

const onerror = () => {

window.removeEventListener('error', onerror);

done();

reject();

};

window[callbackName] = (...args) => {

done();

resolve(...args);

};

timer = setTimeout(onerror, 5 * 60 * 1000); // timeout in 5 min

window.addEventListener('error', onerror);

script.onerror = onerror;

script.src = url;

document.head.appendChild(script);

});

}

export default JSONP;