Canvas toDataURL() returns blank image in Firefox even with .onload and callbacks

Question

I have a problem with toDataURL() function in FireFox

Imagine I have such base64 image:

var url = " data:image/svg+xml;base64,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";

And then I want to resize it and send new uri back:

function getImageUri(url, callback) {
  image = new Image();

  image.onload = function() {
    var image = this; 
    var canvas = document.createElement('canvas'),
        context = canvas.getContext('2d'),
        dataURL;

    context.drawImage(image, 0, 0, 60, 60);
    callback(canvas.toDataURL());
  }

  image.src = url;

}

At the end I just call it to get new uri

getImageUri(url, function (uri) {
    console.log(uri);
    document.getElementById('circle').innerHTML = "<img src=" + uri + ">";
});

Here is the codepen of this example. It works in Chrome, but not in FireFox.

I've searched a lot for similar questions here and most of time the reason was use of image without waiting for its loading, but I have this .onload thing, right?

And also I've tried to make same actions as in this question, but FF is still showing just transparent image. Please help!

Answer 1

There’s a bug open in Firefox about this: drawImage() fails silently when drawing an SVG image without @width or @height.

You can fix it by adding (go figure) width and height to the SVG:

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="119" height="119" viewBox="0 0 119 119">
    …

Updated Codepen