[Eugene (OEvgeny)]

Related to #5982

Changelog Entry

No changelog entry: tests only.

Description

Follow-up to #5982, answering whether a shadow root nested in another shadow root trips the React 16 check: it does not, because ShadowRoot.getRootNode() returns the shadow root itself, and React 16 listens on that inner shadow root.

Specific Changes

• renderWebChat.spec.tsx: a shadow root nested in another one renders on React 16; an element inside it throws

• customElement/shadowRoot.interact.renderIntoNestedShadowRoot.html: React 16 renders into the inner shadow root, types, sends and clicks a suggested action

• I have added tests and executed them locally

• I have added .changelog/<PR#>-<slug>.md

• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)

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