facebook/react — pull request #1559 by spicyj (2014-05-19 06:27:38+00:00)
Title: Allow unmounting title tag

cf. #1376.

This is useful for SVG. Dynamically adding and removing `

` elements in SVG still won't work properly because of getMarkupWrap but this at least lets you include it in initial render and then unmount the entire `<svg>` without problems.