For the common use-cases, SVGs do render consistently across browsers, but there are differences in feature support and rendering behavior outside of those. re

For the common use-cases, SVGs do render consistently across browsers, but there are differences in feature support and rendering behavior outside of those. refX/refY is one example of this. These attributes were added to the SVG spec in 2015 and didn’t have support in all major browsers until a few weeks ago.