Function commitLayoutEffectsOnFiber

packages/react-reconciler/src/commitWork.ts:193–204

(
	finishedWork: FiberNode,
	root: FiberRootNode
)

}

const commitLayoutEffectsOnFiber = (
	finishedWork: FiberNode,
	root: FiberRootNode
) => {
	const { flags, tag } = finishedWork;

	if ((flags & Ref) !== NoFlags && tag === HostComponent) {
		// 绑定新的ref
		safelyAttachRef(finishedWork);
		finishedWork.flags &= ~Ref;
	}
};

function safelyAttachRef(fiber: FiberNode) {
	const ref = fiber.ref;