Function normalizeSlot

packages/runtime-core/src/componentSlots.ts:92–119

(
  key: string,
  rawSlot: Function,
  ctx: ComponentInternalInstance | null | undefined,
)

    : [normalizeVNode(value as VNodeChild)]

const normalizeSlot = (
  key: string,
  rawSlot: Function,
  ctx: ComponentInternalInstance | null | undefined,
): Slot => {
  if ((rawSlot as any)._n) {
    // already normalized - #5353
    return rawSlot as Slot
  }
  const normalized = withCtx((...args: any[]) => {
    if (
      __DEV__ &&
      currentInstance &&
      !(ctx === null && currentRenderingInstance) &&
      !(ctx && ctx.root !== currentInstance.root)
    ) {
      warn(
        `Slot "${key}" invoked outside of the render function: ` +
          `this will not track dependencies used in the slot. ` +
          `Invoke the slot function inside the render function instead.`,
      )
    }
    return normalizeSlotValue(rawSlot(...args))
  }, ctx) as Slot
  // NOT a compiled slot
  ;(normalized as ContextualRenderFn)._c = false
  return normalized
}

const normalizeObjectSlots = (
  rawSlots: RawSlots,