// Get data from list of URL's in asynchronous.

function asyncRequester(url) {
    return fetch(url).then((response) => response.json());
}

var urls = ['temp.json', 'temp.json', 'temp.json', 'temp.json', 'temp.json'],
    pall = [],
    resu = document.querySelector('#results');

for(var i in urls) {
    pall.push(asyncRequester(urls[i]));
}

Promise.all(pall).then(function(results) {
    for(var i in results) {
        var li = document.createElement('li'),
            text = document.createTextNode(results[i][0]['title']['rendered']);
        li.appendChild(text);
        resu.appendChild(li);
    }
});