Function remove

packages/runtime-core/src/components/Teleport.ts:315–366

(
    vnode: VNode,
    parentComponent: ComponentInternalInstance | null,
    parentSuspense: SuspenseBoundary | null,
    { um: unmount, o: { remove: hostRemove } }: RendererInternals,
    doRemove: boolean,
  )

  },

  remove(
    vnode: VNode,
    parentComponent: ComponentInternalInstance | null,
    parentSuspense: SuspenseBoundary | null,
    { um: unmount, o: { remove: hostRemove } }: RendererInternals,
    doRemove: boolean,
  ): void {
    const {
      shapeFlag,
      children,
      anchor,
      targetStart,
      targetAnchor,
      target,
      props,
    } = vnode
    const disabled = isTeleportDisabled(props)
    const shouldRemove = doRemove || !disabled
    // A deferred teleport inside a pending suspense may be unmounted before its
    // content is ever mounted. Clear the queued mount effect; the children
    // loop below is skipped because nothing has been mounted yet.
    const pendingMount = pendingMounts.get(vnode)
    if (pendingMount) {
      pendingMount.flags! |= SchedulerJobFlags.DISPOSED
      pendingMounts.delete(vnode)
    }

    if (target) {
      hostRemove(targetStart!)
      hostRemove(targetAnchor!)
    }

    // an unmounted teleport should always unmount its children whether it's disabled or not
    doRemove && hostRemove(anchor!)
    // #14876 don't unmount children if nothing was mounted
    if (
      !pendingMount &&
      (disabled || target) &&
      shapeFlag & ShapeFlags.ARRAY_CHILDREN
    ) {
      for (let i = 0; i < (children as VNode[]).length; i++) {
        const child = (children as VNode[])[i]
        unmount(
          child,
          parentComponent,
          parentSuspense,
          shouldRemove,
          !!child.dynamicChildren,
        )
      }
    }
  },

  move: moveTeleport as typeof moveTeleport,
  hydrate: hydrateTeleport as typeof hydrateTeleport,