If they're cross-compatible, let's keep the 3 selectors so we don't have to go back and forth for now. Also it's best to use a selector array with a comment after each selector

... selector array with a comment after each selector

elementReady doesn't seem to accept an array. Anything I'm missing?

... selector array with a comment after each selector

elementReady doesn't seem to accept an array. Anything I'm missing?

elementReady(['a', 'b'].join(','))

I went back to look at the old PR: The selector was only broken back then because they had dropped the --blue class, but was otherwise valid as a generic "Box" selector. In short, the hx class was never needed.