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Specification https://html.spec.whatwg.org/multipage/dnd.html#dndevents Summary The drag and drop specifications require the "dataTransfer"'s object "dropEffect" attribute to have certain predetermined values on "dragEnter", "dragOver" and "dragLeave". Drag enter and drag over should have a "dropEffect" based on the current "effectAllowed", and "dragLeave" should always have a "none" "dropEffect". Currently, Chromium doesn't adhere to these rules. With the launch of this feature, Chromium will start respecting the specification and assigning the correct values to this attribute so that web developers can start relying on it. Blink component Blink>DataTransfer Web Feature ID draganddrop Motivation Many bug reports have been filed over the years by developers being affected by the lack of a correct dropEffect implementation: https://issues.chromium.org/issues?q=title:*dropEffect* Initial public proposal No information provided TAG review No information provided TAG review status Not applicable Risks Interoperability and Compatibility None. Drop effect is reported as working properly in Firefox and Safari Gecko: Shipped/Shipping WebKit: Shipped/Shipping Web developers: Strongly positive Visiting the crbug query linked in the "Motivation" section will show strong sentiment from web developers in wanting this fixed. 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. Should any implementation issue be found, we have a feature flag acting as a kill switch (SetDefaultDropEffect). Debuggability No additional functionality is needed to be added to debug this feature 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? Yes * WPT: "dropEffect" and "effectAllowed" are tested in: https://wpt.fyi/results/html/editing/dnd/drop?label=master&label=experimental&aligned * Other tests: We have unit tests (drag_and_drop_interactive_uitest.cc) and blink web tests (third_party/blink/web_tests/fast/dnd/*) verifying the correct functioning of this behavior. Flag name on about://flags None Finch feature name SetDefaultDropEffect Non-finch justification The feature will be shipped enabled by default to be used as a kill-switch in case a severe issue is discovered. Rollout plan Will ship enabled for all users Requires code in //chrome? False Tracking bug https://issues.chromium.org/issues/434151262 Estimated milestones Shipping on desktop 148 Shipping on Android 148 Anticipated spec changes Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (eg links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (eg, changing to naming or structure of the API in a non-backward-compatible way). N/A Link to entry on the Chrome Platform Status https://chromestatus.com/feature/6325617459068928?gate=6549835522113536 This intent message was generated by Chrome Platform Status. -- 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 [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/69aefae6.710a0220.50957.00a4.GAE%40google.com.
