map-tools.js 2.0.2 14 Dec 2019
map-tools.js is a feature-rich Google Maps Javascript wrapper that simplifies things like: Marker filtering, asynchronous loading, working with TopoJSON or GeoJSON, animation and more. It adds a more convenient and easy-to-use API.
minor feature: It allows you to pass the API key. To use the Maps JavaScript API you must have an API key. The API key is a unique identifier that is used to authenticate requests associated with your project for usage and billing purposes.