Can't Save PDF

[hudeaki]

I use code fo insert image from url but can't save to pdf

PDFAnnotate.prototype.addImageToServer = function () {
var inst = this;
var canvas = inst.fabricObjects[inst.active_canvas]

fabric.util.loadImage('https://d1hdtc0tbqeghx.cloudfront.net/sites/536207e0e52e306190000002/theme/images/sd-laravel-icon.png', function(img) {
if(img == null) {
alert("Error!");
}else {
var image = new fabric.Image(img);
canvas.add(image).setActiveObject(image);
canvas.renderAll();
}
}, { crossOrigin: 'anonymous' });

}

[hudeaki]

Or this code insert image finish but can't save pdf

PDFAnnotate.prototype.addImageToServer = function () {
var inst = this;
var canvas = inst.fabricObjects[inst.active_canvas]

fabric.Image.fromURL('https://d1hdtc0tbqeghx.cloudfront.net/sites/536207e0e52e306190000002/theme/images/sd-laravel-icon.png', function(oImg) {

// scale image down, and flip it, before adding it onto canvas
oImg.scale(0.5).set('flipX', true);
canvas.add(oImg);
});
}