Add CSS typed arithmetic examples #339
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bsmth
reviewed
Sep 30, 2025
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| The rotation of each colored story section is calculated based on its |
bsmth
reviewed
Sep 30, 2025
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| The paragraph <code>background-color</code> and |
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This is cool, is there anything to note for colorblindness / a11y concerns regarding background-color changes?
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I don't think so. The color changes are not vital for content legibility, and the change itself does not present an accessibility problem. I've tested the colors at each end of the change for contrast, and they both pass WCAG AAA.
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Chrome 140 adds support for CSS typed arithmetic; see https://chromestatus.com/feature/4740780497043456.
It is not very clear what this is from the spec, but https://css-tricks.com/css-typed-arithmetic/ provides a good explanation.
This PR adds some nice little examples that show what is made possible by this addition.
Note that the linked "Using CSS typed arithmetic" guide does not yet exist; I'm working on that next.