[Vuejs]-How to keep getting data in every component of vue app?

You can store your data or function inside Vuex so they are available across your entire application.

If you’re storing a longitude and lattitude value inside Vuex and update (mutate) them, you’ll automatically see the values update everywhere they are used.

The mutate functionality in Vuex follows the Vue reactivity rules.

In my opinion, there is no any other method to access global watcher instead of managing store. Vuex provides a good management of maintaining store globally.
see how it works from https://vuex.vuejs.org/, a smooth way to manage thing on central place, and when we render a app first time(as SPA or simple App), you just set/update state by call, and get update data location from store by getters.