Seems like a nice feature, sure. Looks like we'd have to do this in javascript though, as I don't see an equivalent functionality built into SVG. The <title> tag might have allowed this but doesn't seem browsers have adopted this as a tooltip-like display.

Perhaps a foreignObject element rather than text would allow more direct support of HTML markup? Though unclear how that would effect the image exports.

Right, due to image exports, and the desire to export SVG itself for use by Illustrator etc, we have avoided foreignObject elements. Anyway I suspect replicating this in javascript will not be terribly difficult.

Hi - this issue has been sitting for a while, so as part of our effort to tidy up our public repositories I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our stack. Cheers - @gvwilson