(function(){
    /* Download captcha
       from net */
    fromNetwork = x => {
        (function(url){
                fetch(url)
                .then(response => response.blob())
                .then(blob => window.open(URL.createObjectURL(blob), '_blank'))
         }
        )(x)
    };

    /*from image*/
    fromImage = x => {(function(src, callback, outputFormat) {
        var img = src;
        img.crossOrigin = 'Anonymous';

        var canvas = document.createElement('CANVAS');
        var ctx = canvas.getContext('2d');
        var dataURL;
        canvas.height = img.naturalHeight;
        canvas.width = img.naturalWidth;
        ctx.drawImage(img, 0, 0);
        dataURL = canvas.toDataURL(outputFormat);
        callback(dataURL);
    })(
      x,
      function(dataUrl) {
        fetch(dataUrl).then(response => response.blob()).then(blob => {
            window.open(URL.createObjectURL(blob), '_blank');
        });
      }
    );};

    ['#captcha', '#iichan-quick-reply-captcha'].forEach(el => {
        var el = document.querySelector(el);

        if(el && !(el.classList.contains('banner'))) { fromImage(el) }
    });
})();