Function setupComponent

packages/runtime-core/src/component.ts:809–827

(
  instance: ComponentInternalInstance,
  isSSR = false,
  optimized = false,
)

export let isInSSRComponentSetup = false

export function setupComponent(
  instance: ComponentInternalInstance,
  isSSR = false,
  optimized = false,
): Promise<void> | undefined {
  isSSR && setInSSRSetupState(isSSR)

  const { props, children } = instance.vnode
  const isStateful = isStatefulComponent(instance)
  initProps(instance, props, isStateful, isSSR)
  initSlots(instance, children, optimized || isSSR)

  const setupResult = isStateful
    ? setupStatefulComponent(instance, isSSR)
    : undefined

  isSSR && setInSSRSetupState(false)
  return setupResult
}

function setupStatefulComponent(
  instance: ComponentInternalInstance,