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Explainer None Specification https://drafts.csswg.org/cssom-view/#dom-document-caretpositionfrompoint Summary This new API allows users to get current caret position from a given screen point. The API returns a CaretPosition object which represents the caret position indicating current text insertion point including the containing DOM node, caret's character offset, and the client rectangle of caret range. The API also supports get CaretPosition inside Shadow DOM. To get CaretPosition inside Shadow DOM, caller needs to provide reference to all the shadow roots that this API can pierce into. Blink component Blink>CSS<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ECSS> TAG review document.caretPositionFromPoint API in shadow DOM scenario · Issue #949 · w3ctag/design-reviews (github.com)<https://github.com/w3ctag/design-reviews/issues/949> TAG review status Issues open Risks Interoperability and Compatibility Gecko already implemented the API without the argument that contains shadow roots that this API can pierce into. Webkit/Blink didn't implement it. The Gecko implementation in shadow DOM scenario is not spec-compliant either (Spec changed recently to cover shadow DOM scenario). Gecko 's position is positive on this API. We expect that Gecko's behavior will be changed to be spec-compliant in the future. There is also a future compat risk too if we decided to deprecate the non-standard API `document.caretRangeFromPoint`: https://crbug.com/690599 Gecko: Positive (https://github.com/mozilla/standards-positions/issues/1012) WebKit: Support (https://github.com/WebKit/standards-positions/issues/301) Web developers: Positive (https://bugs.chromium.org/p/chromium/issues/detail?id=388976#c34) Web developers are asking to have document.caretPositionFromPoint API implemented in Blink: https://bugs.chromium.org/p/chromium/issues/detail?id=388976#c28 https://bugs.chromium.org/p/chromium/issues/detail?id=388976#c34 Other signals: WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None Debuggability None Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? Yes Is this feature fully tested by web-platform-tests<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>? Yes https://github.com/web-platform-tests/wpt/blob/master/css/cssom/caretPositionFromPoint.html https://github.com/web-platform-tests/wpt/blob/master/shadow-dom/Document-caretPositionFromPoint.tentative.html Flag name on chrome://flags None Finch feature name CaretPositionFromPoint Requires code in //chrome? False Tracking bug https://crbug.com/388976 Estimated milestones Shipping on desktop 127 DevTrial on desktop 127 Anticipated spec changes Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way). None Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5201014343073792 Links to previous Intent discussions Intent to prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/2618db7c-56d2-4ff2-89c5-df65e1dfe6c7n%40chromium.org Ready for Trial: https://groups.google.com/a/chromium.org/g/blink-dev/c/v4MLESmFR1c/m/UhstKjucAAAJ This intent message was generated by Chrome Platform Status<https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/BL4PPFE529BCE9B6AE53745A1B777B21499ABF92%40BL4PPFE529BCE9B.namprd00.prod.outlook.com.
