Acme

A formatted price with an optional "was" price and the percentage saved. Formatting goes through `Intl.NumberFormat`, so symbols, decimals and grouping follow the locale and currency instead of being hand-rolled.

A read-only star rating. Fractional values are drawn with a clipped fill rather than rounded to a half, so 4.3 and 4.7 look different. The stars are decorative — the value is announced once through an `aria-label`.