getSvgAsImage

Rasterise an SVG.

The SVG is loaded into an Image and drawn to a canvas, which is the only way to get the browser's own SVG renderer to produce pixels. That means the markup must already be self-contained: an Image loading an SVG gets no access to the page's stylesheets, fonts or cookies, so anything left as an external reference simply does not appear.

Resolves null when there is no DOM to do it in, or when the browser refuses the image — a caller that wanted a picture and got nothing can fall back to offering the SVG itself.