The corner-shape CSS property sets the shape of an element's corners when using border-radius, allowing for shapes other than rounded corners. For example, corner-shape: squircle is a shape in between a square and rounded corner. Shipping in Safari 27.3 (beta). Probes css.properties.corner-shape, css.properties.corner-top-shape. More: developer.mozilla.org/docs/Web/CSS/Reference/Prope… drafts.csswg.org/css-borders-4/#corner-shaping web-platform-dx.github.io/web-features-explorer/fe…
(CSS.supports("corner-shape", "initial")) && (CSS.supports("corner-top-shape", "initial"))(CSS.supports("corner-shape", "initial")) && (CSS.supports("corner-top-shape", "initial"))