Contact emailsmus...@chromium.org, fla...@chromium.org SpecificationNone
Summary Make mouse event targets agnostic to mousedown event cancellation when the pointer is dragged out of an iframe. When the mouse is dragged out of an iframe, all browsers (including Chrome) send mousemove and mouseup events to the iframe. However, if the mousedown event is cancelled, Chrome today maintains an old WebKit exception that mousemove and mouseup events are sent to the outer frame. WebKit removed this exception last year, and Mozilla never showed this behavior in recent years. This feature will remove the Chrome-only exception for this special case. Blink componentBlink>Input <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EInput> TAG reviewNone TAG review statusNot applicable Risks Interoperability and Compatibility This change will make Chrome fully interoperable with Firefox and Safari. We don't expect many compat problems from this change as this is a desktop focused special case in which Chrome is different from other browsers. I.e. we would expect users to see the issues in other browsers already. The compat risk is non-zero, however it is difficult to measure whether the change to the frame target changes would be breaking without exposing the change. *Gecko*: Shipped/Shipping *WebKit*: Shipped/Shipping (https://bugs.webkit.org/show_bug.cgi?id=262691) *Web developers*: No signals *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://wpt.fyi/results/uievents/mouse/cancel-mousedown-in-subframe.html?label=experimental&label=master&aligned Flag name on chrome://flagsNone Finch feature nameMouseDragFromIframeOnCancelledMouseDown Requires code in //chrome?False Tracking bughttps://crbug.com/269917 Sample links https://mustaqahmed.github.io/web/interop/cancel-mousedown-in-iframe-top.html https://codepen.io/mustaqahmed/full/yLjBraJ Estimated milestones Shipping on desktop 122 Shipping on Android 122 Shipping on WebView 122 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/5083240891416576 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/CAB0cuO7Q-kLsBQTO0Qa5w6ZUxtkM8Q371W5MEuUVvXPp10g4XQ%40mail.gmail.com.
