Check out what's in Safari Technology Preview 179, out today. Includes:
- new relaxed parsing behavior for CSS Nesting
- `mask-border`
- `cap`, `rcap`, `rex`, `ric`, and `rch` units
- `<position>` and `coord-box` parameters in `ray()`
- `offset-position: normal`; `circle()` and `ellipse()`; `xywh()` shape
- WebRTC HEVC RFC 7789 RTP Payload Format
- SVG `<image crossorigin>`
- `window.clientInformation` in terms of `window.navigator`
- and more!
https://webkit.org/blog/14532/release-notes-for-safari-technology-preview-179/