Sandboxed rendered, but normal svg output

[DavidMulder0]

Is there a way to use the sandboxed renderer, but retrieve a clean svg (rather than a iframe with a data URI)?

Use case: My final rendering environment has not great SVG support (Apache FOP), so I was planning on drawing the mermaid svg output to a canvas and then include it as a PNG. My CSS rendering environment however is 'tainted', so the bounding box calculations are affected (at least, that's my hypothesis based on what I am seeing), which is solved by the sandboxed renderer which runs everything in an iframe, but then in the last step it claims to return an svg, but it's actually an <iframe> node 🥺 . Obviously I can both manually unwrap the iframe code (which is icky, because the code might change thus breaking the unwrap in the future) or I can manually run mermaid inside a sandboxed iframe (which isn't that bad, but would make my code needlessly complex),