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Add getRootNode to fabric fragment instance #34544

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Add getRootNode to fabric fragment instance #34544

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18 changes: 18 additions & 0 deletions packages/react-native-renderer/src/ReactFiberConfigFabric.js
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Original file line number Diff line number Diff line change
Expand Up @@ -645,6 +645,9 @@ export type FragmentInstanceType = {
observeUsing: (observer: IntersectionObserver) => void,
unobserveUsing: (observer: IntersectionObserver) => void,
compareDocumentPosition: (otherNode: PublicInstance) => number,
getRootNode(getRootNodeOptions?: {
composed: boolean,
}): Node | FragmentInstanceType,
};

function FragmentInstance(this: FragmentInstanceType, fragmentFiber: Fiber) {
Expand Down Expand Up @@ -754,6 +757,21 @@ function collectChildren(child: Fiber, collection: Array<Fiber>): boolean {
return false;
}

// $FlowFixMe[prop-missing]
FragmentInstance.prototype.getRootNode = function (
this: FragmentInstanceType,
getRootNodeOptions?: {composed: boolean},
): Node | FragmentInstanceType {
const parentHostFiber = getFragmentParentHostFiber(this._fragmentFiber);
if (parentHostFiber === null) {
return this;
}
const parentHostInstance = getPublicInstanceFromHostFiber(parentHostFiber);
// $FlowFixMe[incompatible-use] Fabric PublicInstance is opaque
const rootNode = (parentHostInstance.getRootNode(getRootNodeOptions): Node);
return rootNode;
};

export function createFragmentInstance(
fragmentFiber: Fiber,
): FragmentInstanceType {
Expand Down
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