Click to set class to
After clicking the button above, it should look like this:
It does in Firefox 58.0.2 and Chrome 64.0.3282.186 (Mac OS High Sierra 10.13.3). It does not in Safari 11.0.3 (13604.5.6) or WebKit Build r229115 (FEBRUARY 28, 2018, 5:11 PM PST). The text is rotated in Safari.