How can I get Mathematica to include size information in exported SVG?

Question

When I use Export to export graphics in SVG format, the exported file contains no width height or viewBox attributes, so that the resulting files don't "scale" at all, which is the whole point.

Is there a way to get Export to include size information in exported SVGs?

Answer 1

Mathematica does not put information about width and height into <svg> tag, but the first group contains a filled rectangle (<rect fill ...>) that does have width and height.

You may extract width and height attributes from that <rect> and assign them to the root <svg> element.