Jquery: convert img src to base64

convert_img_to_base64.js

function convertImgToBase64(url, callback, outputFormat) {
    var canvas = document.createElement('CANVAS'),
        ctx = canvas.getContext('2d'),
        img = new Image;
    img.crossOrigin = 'Anonymous';
    img.onload = function () {
        var dataURL;
        canvas.height = img.height;
        canvas.width = img.width;
        ctx.drawImage(img, 0, 0);
        dataURL = canvas.toDataURL(outputFormat);
        callback.call(this, dataURL);
        canvas = null;
    };
    img.src = url;
}

$("img").each(function (index, element) {
    convertImgToBase64($(this).attr('src'), function (base64Img) {
        $(element).attr('src', base64Img);
    });
});