Function getInnerChild

packages/runtime-core/src/components/BaseTransition.ts:509–536

(vnode: VNode)

}

function getInnerChild(vnode: VNode): VNode | undefined {
  if (!isKeepAlive(vnode)) {
    if (isTeleport(vnode.type) && vnode.children) {
      return findNonCommentChild(vnode.children as VNode[])
    }

    return vnode
  }
  // #7121,#12465 get the component subtree if it's been mounted
  if (vnode.component) {
    return vnode.component.subTree
  }

  const { shapeFlag, children } = vnode

  if (children) {
    if (shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
      return (children as VNodeArrayChildren)[0] as VNode
    }

    if (
      shapeFlag & ShapeFlags.SLOTS_CHILDREN &&
      isFunction((children as any).default)
    ) {
      return (children as any).default()
    }
  }
}

export function setTransitionHooks(vnode: VNode, hooks: TransitionHooks): void {
  if (vnode.shapeFlag & ShapeFlags.COMPONENT && vnode.component) {