Leaflet/docs/_plugins/events/leafletactivearea.md

name	category	repo	author	author-url	demo	compatible-v0	compatible-v1	compatible-v2
Leaflet-active-area	events	https://github.com/Mappy/Leaflet-active-area	Mappy	https://github.com/Mappy	https://techblog.mappy.com/Leaflet-active-area/examples/index.html		true	false

This plugin allows you to use a smaller portion of the map as an active area. All positioning methods (setView, fitBounds, setZoom) will be applied on this portion instead of the all map.