Wrong position on SVG tspan in Chrome

[louisameline]

Reported by @ezzatron:

the positioning of the tooltip when used on a <tspan> element doesn't seem to work. It positions itself as if it were used on the parent <text> element. Not sure if that's my problem (maybe <tspan> doesn't allow positioning), or a bug?

[louisameline]

Thank you @ezzatron for the report.

It seems to be a Chrome bug:
https://bugs.chromium.org/p/chromium/issues/detail?id=349835&q=tspan%20bbox&colspec=ID%20Pri%20M%20Stars%20ReleaseBlock%20Component%20Status%20Owner%20Summary%20OS%20Modified
Also discussed on http://stackoverflow.com/questions/5364980/how-to-get-the-width-of-an-svg-tspan-element

I don't think I'll implement a fix myself. I mentioned the issue to the maintainer of SVG.js here, who might decide to deal with it in his library (that our SVG plugin uses when it's included in the page). If he decides not to take care of it, pull requests are always welcome.

[ezzatron]

I came to the same conclusion, as it worked better (if still a bit imperfectly) under Firefox.