core/packages/runtime-vapor/src/insertionState.ts

import { setCurrentHydrationNode } from './dom/hydration'

export let insertionParent: ParentNode | undefined
export let insertionAnchor: Node | 0 | undefined

/**
 * This function is called before a block type that requires insertion
 * (component, slot outlet, if, for) is created. The state is used for actual
 * insertion on client-side render, and used for node adoption during hydration.
 */
export function setInsertionState(parent: ParentNode, anchor?: Node | 0): void {
  insertionParent = parent
  insertionAnchor = anchor
}

export function resetInsertionState(): void {
  insertionParent = insertionAnchor = undefined
  setCurrentHydrationNode(null)
}