Function applyOptions

packages/runtime-core/src/componentOptions.ts:520–792

(instance: ComponentInternalInstance)

export let shouldCacheAccess = true

export function applyOptions(instance: ComponentInternalInstance): void {
  const options = resolveMergedOptions(instance)
  const publicThis = instance.proxy! as any
  const ctx = instance.ctx

  // do not cache property access on public proxy during state initialization
  shouldCacheAccess = false

  // call beforeCreate first before accessing other options since
  // the hook may mutate resolved options (#2791)
  if (options.beforeCreate) {
    callHook(options.beforeCreate, instance, LifecycleHooks.BEFORE_CREATE)
  }

  const {
    // state
    data: dataOptions,
    computed: computedOptions,
    methods,
    watch: watchOptions,
    provide: provideOptions,
    inject: injectOptions,
    // lifecycle
    created,
    beforeMount,
    mounted,
    beforeUpdate,
    updated,
    activated,
    deactivated,
    beforeDestroy,
    beforeUnmount,
    destroyed,
    unmounted,
    render,
    renderTracked,
    renderTriggered,
    errorCaptured,
    serverPrefetch,
    // public API
    expose,
    inheritAttrs,
    // assets
    components,
    directives,
    filters,
  } = options

  const checkDuplicateProperties = __DEV__ ? createDuplicateChecker() : null

  if (__DEV__) {
    const [propsOptions] = instance.propsOptions
    if (propsOptions) {
      for (const key in propsOptions) {
        checkDuplicateProperties!(OptionTypes.PROPS, key)
      }
    }
  }