Safari 11: Save Image about carbon

[zcei]

This is a known limitation in the underlaying library.

Safari is stricter with a specific tag that is used to render the DOM to an image. A potential workaround would be rendering it as an SVG and use a server endpoint to render it to an SVG.

I'm currently building a server endpoint that takes the settings & code and returns a PNG directly - this could eventually be used for Safari users as well, I guess.

Edit: Actually it's a "duplicate" of #28

[mfix22]

Thanks @zcei. We will track this issue at #28. Closing.