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For those wondering, the main trick is here: https://github.com/chinchang/hint.css/blob/master/hint.css#L...

This creates a pseudo ":after" element with content set to the value of the data-hint attribute. Smart!

https://developer.mozilla.org/en-US/docs/Web/CSS/attr

That's amazingly useful. I'd never seen that before. It says that support other than with 'content' is experimental. Where else does it work? Does anyone have any other useful / novel use cases they could share?

I believe it's pretty solid: http://caniuse.com/#search=CSS%20Generated%20content%20for%2...

Also checkout the pseudo counter: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Lists_a...

Very clever. I didn't know you could reference attributes in css.

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