Ajax.js

export function requestText(url) {
    return new Promise((resolve, reject) => {
        let xhr = new XMLHttpRequest();
        xhr.open('GET', url);
        xhr.onload = () => {
            if (xhr.status >= 200 && xhr.status < 300) {
                resolve(xhr.response);
            } else {
                reject(xhr.statusText);
            }
        };
        xhr.onerror = () => reject(xhr.statusText);
        xhr.send();
    });
}

export function requestImage(url) {
    return new Promise((resolve, reject) => {
        let img = new Image();
        img.src = url;
        img.onload = () => resolve(img);
        img.onerror = (e) => reject(e);
    });
}