Function renderComponentVNode

packages/server-renderer/src/render.ts:92–124

(
  vnode: VNode,
  parentComponent: ComponentInternalInstance | null = null,
  slotScopeId?: string,
)

}

export function renderComponentVNode(
  vnode: VNode,
  parentComponent: ComponentInternalInstance | null = null,
  slotScopeId?: string,
): SSRBuffer | Promise<SSRBuffer> {
  const instance = (vnode.component = createComponentInstance(
    vnode,
    parentComponent,
    null,
  ))
  if (__DEV__) pushWarningContext(vnode)
  const res = setupComponent(instance, true /* isSSR */)
  if (__DEV__) popWarningContext()
  const hasAsyncSetup = isPromise(res)
  let prefetches = instance.sp /* LifecycleHooks.SERVER_PREFETCH */
  if (hasAsyncSetup || prefetches) {
    const p: Promise<unknown> = Promise.resolve(res as Promise<void>)
      .then(() => {
        // instance.sp may be null until an async setup resolves, so evaluate it here
        if (hasAsyncSetup) prefetches = instance.sp
        if (prefetches) {
          return Promise.all(
            prefetches.map(prefetch => prefetch.call(instance.proxy)),
          )
        }
      })
      // Note: error display is already done by the wrapped lifecycle hook function.
      .catch(NOOP)
    return p.then(() => renderComponentSubTree(instance, slotScopeId))
  } else {
    return renderComponentSubTree(instance, slotScopeId)
  }
}

function renderComponentSubTree(
  instance: ComponentInternalInstance,