Function commitPlacement

packages/react-reconciler/src/commitWork.ts:430–444

(finishedWork: FiberNode)

}

const commitPlacement = (finishedWork: FiberNode) => {
	if (__DEV__) {
		console.warn('执行Placement操作', finishedWork);
	}
	// parent DOM
	const hostParent = getHostParent(finishedWork);

	// host sibling
	const sibling = getHostSibling(finishedWork);

	// finishedWork ~~ DOM append parent DOM
	if (hostParent !== null) {
		insertOrAppendPlacementNodeIntoContainer(finishedWork, hostParent, sibling);
	}
};

function getHostSibling(fiber: FiberNode) {
	let node: FiberNode = fiber;