Overview of CSS Shapes - CSS: Cascading Style Sheets
future css shapes features the initial shapes specification included a property shape-inside for creating shapes inside an element.
...as the shape-inside property was initially in level 1 of the specification, you may find tutorials on the web detailing both properties.

WebKit CSS extensions - CSS: Cascading Style Sheets
ction -webkit-flow-from -webkit-flow-into -webkit-grid-columns (see grid-column) -webkit-grid-rows (see grid-row) -webkit-hyphenate-charset -webkit-image-set (see image-set()) -webkit-mask-attachment -webkit-match-nearest-mail-blockquote-color -webkit-overflow-scrolling -webkit-region-break-after -webkit-region-break-before -webkit-region-break-inside -webkit-region-fragment -webkit-shape-inside -webkit-touch-callout (see touch-action) background-origin-x (unprefixed!) background-origin-y (unprefixed!) * still supported in the safari technology preview, but not in a generally released browser.

SVG 2 support in Mozilla - SVG: Scalable Vector Graphics
.animatedpoints as alias of svganimatedpoints.points implementation status unknown auto behavior for rx and ry in <ellipse> implementation status unknown text change notes text-decoration-fill and text-decoration-stroke properties not implemented yet (bug 1303569) inline-size attribute for <text> implementation status unknown shape-inside property inplementation status unknown shape-subtract property inplementation status unknown white-space implementation status unknown deprecated xml:space attribute implementation status unknown kerning property removed implementation status unknown path attribute for <textpath> implemented (bug 1446617) reference basic shap...