Re: [w3c/clipboard-apis] Add comprehensive clipboardchange event specification with ClipboardChangeEventInit dictionary (PR #239)

@roraja commented on this pull request.



> @@ -224,12 +227,166 @@ url: https://w3c.github.io/permissions/#permissions-task-source; type: dfn;
    * Scripts that use the [[#async-clipboard-api]] to write to the clipboard
    * Actions that update the clipboard outside the user agent
 
-   If the clipboard contents are changed outside the user agent, then the
-   {{GlobalEventHandlers/clipboardchange}} event MUST fire when the user agent regains focus.
+   <div class="algorithm" data-algorithm="fire-clipboardchange-event">
+   <h5 id="h-fire-clipboardchange-event">To fire a clipboardchange event</h5>
+
+   To <dfn export>fire a clipboardchange event</dfn> given a {{Document}} <var>document</var>:
+
+   1. If <var>document</var> does not have [=sticky activation=] and <var>document</var> does not have permission to read from the clipboard, then return.
+
+   2. Let <var>global</var> be <var>document</var>'s [=relevant global object=].
+
+   3. If <var>document</var> has [=system focus=]:
+    1. Let <var>types</var> be a list of [=mandatory data types=] available on the [=system clipboard=].
+    2. Let <var>changeId</var> be a unique identifier for this clipboard change, generated by applying a partition-specific transformation to a system-level clipboard change identifier, ensuring that different [=partitions=] receive different identifiers for the same clipboard change while maintaining consistency within the same [=partition=].

I have updated the spec as per this discussion keeping the implementation detail non-normative while keeping the expectation from changeID normative. Would this work ?

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