LGTM1. Thanks for fixing long-standing compat issues. Deeply appreciated.
Best, Alex On Monday, March 9, 2026 at 9:53:11 AM UTC-7 Chromestatus wrote: > *Contact emails* > [email protected], [email protected] > > *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 > <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EDataTransfer%22> > > *Web Feature ID* > draganddrop <https://webstatus.dev/features/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 > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* > 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 (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). > 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 > <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 [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/7f1bd7b3-ca90-4b09-8044-2319a3db485cn%40chromium.org.
