Adding a Title to the Layer Control Box in Leaflet using R with HTML Widgets and JavaScript Functions.

Adding Multiple Layers of Control to a Leaflet Map with AddLayersControl: A Step-by-Step Guide

Understanding addMarkers() in R Leaflet: A Deep Dive into Pop-Ups - How to Create Interactive Maps with Correctly Displaying Pop-Ups Using R Leaflet Package.

Shiny Leaflet Map with Clicked Polygon Data Frame Output