fetch-image.js

// Functionnya
function getImage(url) {
    return new Promise(function(resolve, reject) {
        var img = new Image();
        img.onload = function() {
            resolve(url);
        };
        img.onerror = function() {
            reject(url);
        };
        img.src = url;
    });
}

// Cara pakai functionnya
getImage("imgUrl")
    .then(function(successUrl) {
        //do stufff
    })
    .catch(function(errorUrl) {
        //do stuff
    });