Function observe

src/reactivity/reactive.ts:116–136

(obj: T)

}

export function observe<T>(obj: T): T {
  const Vue = getRegisteredVueOrDefault()
  let observed: T
  if (Vue.observable) {
    observed = Vue.observable(obj)
  } else {
    const vm = defineComponentInstance(Vue, {
      data: {
        $$state: obj,
      },
    })
    observed = vm._data.$$state
  }

  // in SSR, there is no __ob__. Mock for reactivity check
  if (!hasOwn(observed, '__ob__')) {
    mockReactivityDeep(observed)
  }

  return observed
}

/**
 * Mock __ob__ for object recursively