Since the definition of Em and Ex are circular, how do bowser implementers go ab... | Hacker News

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seabass 6 months ago | parent | context | favorite | on: CSS Tip: An em isn't an "m", but an ex is an "x" (...

Since the definition of Em and Ex are circular, how do bowser implementers go about actually building them? Do the actual implementations differ from the spec in that regard?

LoganDark 6 months ago [–]

They're not really circular. `1em` simply refers to the font size value. `1ex` is derived from the font size + font choice.

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