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Expose supported legacy document commands - #445
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wieslawsoltes
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September 18, 2026 17:37
This was referenced Sep 18, 2026
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Problem and behavior
Unchanged Code OSS probes
document.queryCommandSupported(...)before enabling clipboard actions, but WebScene exposed only the corresponding boundedexecCommandimplementations. Top-level, initial iframe, navigated iframe, and detached HTML document realms now expose the non-constructible query operation and report onlycopy,cut,paste, andselectAllas supported.Closes #443. Advances #268 and #264.
The change adds no host authority and does not touch consolidation #76, AppScene, or vscode-demo.
Validation debt
Per the current implementation-only directive, this PR was not held for new browser/WPT/native/performance/CI evidence. #443 records the deferred descriptor, coercion, realm, product, lifecycle, and boundedness matrix.