const fetchWithPromise = (() => {
    let promiseCache = {};

    return function (url, timeout = 2000) {
        return promiseCache[url] = promiseCache[url] || (() => {
            var timer = setTimeout(function () {
                return reject(new Error('Request timed out'));
            }, timeout);

            return Promise.race([timer, simpleCache[url] = fetch(url)
                .then(response => response.text())
            ]);
        })();
    }
})();
// Demo Plugin
$.fn.myPlugin = function(url) {
    var userdata = fetchWithPromise(url, 2000);

    this.each(function(e) {
        userdata.then(function (data) {
            this.innerHTML = data;
        });
    });
    return this;
};

// Demo Init Code
$(function() {
    $(".element-1").myPlugin('https://raw.githubusercontent.com/callaginn/data/master/array.json');
    $(".element-2").myPlugin('https://raw.githubusercontent.com/callaginn/data/master/array.json');
});