# Safari Technology Preview 218 Release Notes Learn about the latest web technology updates in Safari Technology Preview: CSS, JavaScript, Lockdown Mode, Rendering, SVG, Web API, Web Extensions, Web Inspector, and WebRTC. ## Overview [Safari Technology Preview](https://webkit.org/blog/6017/introducing-safari-technology-preview/) Release 218 is now [available for download](https://developer.apple.com/safari/resources/) for macOS Sequoia and macOS Sonoma. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes WebKit changes between: [293327@main…293898@main](https://github.com/WebKit/WebKit/compare/85b73124f671d6d8fbe2b6dc730b98711b42326d...b790eacf7796810f2244dfe9cc5964dc68328f85) ### CSS #### New Features - Added support for `crossorigin()` and `referrerpolicy()` modifiers on CSS image loads. ([293647@main](https://commits.webkit.org/293647@main)) (149166339) #### Resolved Issues - Fixed `@font-face font-family` descriptor to not allow a list of values. ([293892@main](https://commits.webkit.org/293892@main)) (142009630) - Fixed placeholder visibility to update on input type change. ([293346@main](https://commits.webkit.org/293346@main)) (148681639) - Fixed an issue where float boxes, selections, and carets were incorrectly painted inside skipped subtrees.([293358@main](https://commits.webkit.org/293358@main)) (148741142) - Fixed incorrect `getBoundingClientRect()` inside skipped subtree on an out-of-flow positioned box. ([293428@main](https://commits.webkit.org/293428@main)) (148770252) - Fixed: Updated the CSS `random()` function implementation to match the latest spec changes. ([293439@main](https://commits.webkit.org/293439@main)) (148868731) - Fixed: Replace `match-element` with `element-shared` in the random() function to match the standard changes. ([293474@main](https://commits.webkit.org/293474@main)) (148920346) - Fixed making `
` and other elements use logical margins in the User-Agent stylesheet. ([293670@main](https://commits.webkit.org/293670@main))  (149212392)

### JavaScript

#### New Features

- Added more support for `Temporal`. ([293864@main](https://commits.webkit.org/293864@main))  (75685318)

#### Resolved Issues

- Fixed iterator helpers incorrectly closing iterators on early errors. ([293842@main](https://commits.webkit.org/293842@main))  (148774612)
- Fixed `Iterator.prototype.reduce` failing with an `undefined` initial parameter. ([293797@main](https://commits.webkit.org/293797@main))  (149470140)

### Lockdown Mode

#### New Features

- Added support for more web fonts in Lockdown Mode by replacing a fragile hard-coded allowlist with a safe parser that handles a broader range of fonts without compromising security. ([293728@main](https://commits.webkit.org/293728@main))  (149314760)

### Rendering

#### Resolved Issues

- Fixed an issue to allow images in scroll containers to load when they are near the viewport rather than when they are intersecting the viewport. ([293552@main](https://commits.webkit.org/293552@main))  (118706766)
- Fixed incorrect `ruby` annotation positioning in `sideways-lr`. ([293572@main](https://commits.webkit.org/293572@main))  (148713073)
- Fixed: Prevented hit testing content inside a skipped subtree. ([293361@main](https://commits.webkit.org/293361@main))  (148741508)

### SVG

#### New Features

- Added support for `pointer-events="bounding-box"` for SVG `group` containers. ([293473@main](https://commits.webkit.org/293473@main))  (148181592)

### Web API

#### Resolved Issues

- Fixed an issue where pending utterances do not receive an error event when speech synthesis is cancelled.([293536@main](https://commits.webkit.org/293536@main))  (148731039)

### Web Extensions

#### New Features

- Added support for the request-method content blocker trigger field. ([293746@main](https://commits.webkit.org/293746@main))  (148474901)

#### Resolved Issues

- Fixed converting declarativeNetRequest rules so that higher numbers are treated as higher priority. ([293546@main](https://commits.webkit.org/293546@main))  (145570245) (FB16607998)
- Fixed an issue causing`wasm-unsafe-eval` to not get parsed as a valid CSP keyword. ([293854@main](https://commits.webkit.org/293854@main))  (147551225)
- Fixed and issue that prevented loading a web accessible resource from a subframe at `about:blank`. ([293839@main](https://commits.webkit.org/293839@main))  (149494286)

### Web Inspector

#### New Features

- Added support in the Debugger tab for stepping over an `await` statement as though it is synchronous code. ([293628@main](https://commits.webkit.org/293628@main))  (149133320)

### WebRTC

#### New Features

- Added support for `RTCRtpScriptTransformer.generateKeyFrame` to take a `rid` parameter. ([293633@main](https://commits.webkit.org/293633@main))  (148592676)

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