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import * as React from 'react'
import { createPortal } from 'react-dom'
import { useDevOverlayContext } from '../../dev-overlay.browser'
export function ShadowPortal({ children }: { children: React.ReactNode }) {
const { state } = useDevOverlayContext()
let portalNode = React.useRef<HTMLElement | null>(null)
let shadowNode = React.useRef<ShadowRoot | null>(null)
let [, forceUpdate] = React.useState<{} | undefined>()
// Don't use useLayoutEffect here, as it will cause warnings during SSR in React 18.
// Don't use useSyncExternalStore as an SSR gate unless you verified it doesn't
// downgrade a Transition of the initial root render to a sync render or
// we can assure the root render is not a Transition.
React.useEffect(() => {
const ownerDocument = document
portalNode.current = ownerDocument.querySelector('nextjs-portal')!
if (state.theme === 'dark') {
portalNode.current.classList.add('dark')
portalNode.current.classList.remove('light')
} else if (state.theme === 'light') {
portalNode.current.classList.add('light')
portalNode.current.classList.remove('dark')
} else {
portalNode.current.classList.remove('dark')
portalNode.current.classList.remove('light')
}
// We can only attach but never detach a shadow root.
// So if this is a remount, we don't need to attach a shadow root. Only
// on the very first, DOM-wide mount.
// This is mostly guarding against faulty _app implementations that
// create React Root in getInitialProps but don't clean it up like test/integration/app-tree/pages/_app.tsx
if (portalNode.current.shadowRoot === null) {
shadowNode.current = portalNode.current.attachShadow({ mode: 'open' })
}
forceUpdate({})
}, [state.theme])
return shadowNode.current
? createPortal(children, shadowNode.current as any)
: null
}
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