[Cookbook] Practical use of scoped slots with GoogleMaps (#1754) (#1296)
[Cookbook] Practical use of scoped slots with GoogleMaps (#1754) (#1296)

* initial version

* minor corrections

* add codesandbox link

* corrections

* further corrections

* apply CR corrections

* apply CR suggestions

* set proper order value
vuejs/jp.vuejs.org,potato4d/jp.vuejs.org,potato4d/jp.vuejs.org,vuejs/jp.vuejs.org