Thanks Alex for reviewing.

We are expecting feedback from Chrome remote desktop application, Excel online 
and Citrix's web based solutions for their remote desktop application (as per 
their feedback here<https://github.com/WICG/proposals/issues/186>). We might 
expect more engagement from similar web based rich text/image editors and 
remote desktop applications.

If the feedback is positive for the API and if we see good adoption, then we 
might propose I2S before the close of the OT.

-Rohan


________________________________
From: Alex Russell <slightly...@chromium.org>
Sent: Monday, July 14, 2025 11:50 PM
To: blink-dev <blink-dev@chromium.org>
Cc: Rohan Raja <ror...@microsoft.com>; Rakesh Goulikar 
<rakesh.gouli...@microsoft.com>
Subject: [EXTERNAL] Re: Intent to Experiment: Clipboardchange event

LGTM1; are there engaged partners that you're expecting to get feedback from? 
And is there any chance you'll come back with an I2S before the close of the OT?

Thanks,

Alex

On Monday, July 14, 2025 at 10:24:44 AM UTC-7 Rohan Raja wrote:


Contact emails
ror...@microsoft.com<mailto:ror...@microsoft.com>, 
ragou...@microsoft.com<mailto:ragou...@microsoft.com>

Explainer
https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/ClipboardAPI/clipboard-change-event-explainer.md

Specification
https://github.com/w3c/clipboard-apis/pull/239

Summary
The "clipboardchange" event fires whenever the system clipboard contents are 
changed either by a web app or any other system application. This allows 
web-apps like remote desktop clients to keep their clipboards synchronized with 
the system clipboard. It provides an efficient alternative to polling the 
clipboard(using Javascript) for changes.

Blink component
Blink>DataTransfer<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EDataTransfer%22>

Search tags
clipboard change 
event<https://chromestatus.com/features#tags:clipboard%20change%20event>, 
clipboardchange<https://chromestatus.com/features#tags:clipboardchange>, 
clipboard monitor<https://chromestatus.com/features#tags:clipboard%20monitor>

TAG review
https://github.com/w3ctag/design-reviews/issues/1017

TAG review status
Issues addressed

Origin Trial documentation link
https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/ClipboardAPI/clipboard-change-event-explainer.md

Risks


Interoperability and Compatibility
None


Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1115)

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/429)

Web developers: Positive Web based spreadsheet apps like Excel Online and web 
based remote desktop client apps have shown interest in this API. Please refer 
to the explainer document for further details about their use cases.

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



Goals for experimentation

- Primary Objective: Validate the clipboardchange event API design and 
developer adoption patterns in real-world web applications before 
standardization.



- Track clipboardchange event API developer engagement metrics and growth 
trajectories through the counters implemented.



- API Ergonomics Validation: Test whether the event interface and focus 
requirements work intuitively for developers



- Developer Adoption Patterns: Understand how developers integrate the API into 
existing workflows through the community feedback.



Experiment risks

None:

- There are no data storage implications with this event.



- This is a non-critical functionality since this is an enhancement and not a 
major dependency. All current clipboard workflows continue to function without 
the event.



Ongoing technical constraints
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
wpt.fyi/results/clipboard-apis/async-navigator-clipboard-change-event.tentative.https.html
(Note - Some tests are failing on wpt.fyi infra due to flakiness which is being 
looked into, it runs fine in Chromium CQ runs. Test failures in Edge are 
probably due to the feature flag being disabled in the test environment)

Flag name on about://flags
None

Finch feature name
ClipboardChangeEvent

Requires code in //chrome?
False

Tracking bug
https://issues.chromium.org/issues/41442253

Estimated milestones
Shipping on desktop
142
Origin trial desktop first
140
Origin trial desktop last
142
Shipping on Android
142
Origin trial Android first
140
Origin trial Android last
142
Origin trial WebView first
140
Origin trial WebView last
142


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5085102657503232?gate=6192789839413248

Links to previous Intent discussions
Intent to Prototype: 
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/67454fad.2b0a0220.19a388.0284.GAE%40google.com


This intent message was generated by Chrome Platform 
Status<https://chromestatus.com/>.
    


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