Some past related threads:

How to Make Maps Using Leaflet.js, PostGIS and Chicago Open Data - https://news.ycombinator.com/item?id=19784355 - April 2019 (20 comments)

Leaflet – A JavaScript library for mobile-friendly interactive maps - https://news.ycombinator.com/item?id=16149725 - Jan 2018 (36 comments)

Leaflet: An open-source JavaScript library for mobile-friendly interactive maps - https://news.ycombinator.com/item?id=13095390 - Dec 2016 (71 comments)

Leaflet 1.0 – A JavaScript library for mobile-friendly interactive maps - https://news.ycombinator.com/item?id=12589447 - Sept 2016 (99 comments)

D3 and Leaflet maps (2012) - https://news.ycombinator.com/item?id=11017763 - Feb 2016 (8 comments)

Show HN: Lens Battle – Make comparing lenses easier (with leaflet.js) - https://news.ycombinator.com/item?id=10279358 - Sept 2015 (11 comments)

Show HN: Quizzity – a geographical quiz built on top of a Leaflet map - https://news.ycombinator.com/item?id=8981162 - Feb 2015 (6 comments)

Show HN: Traverse City Platmap with Leaflet and D3 - https://news.ycombinator.com/item?id=8164315 - Aug 2014 (6 comments)

Testing web map APIs – Google vs OpenLayers vs Leaflet - https://news.ycombinator.com/item?id=7451375 - March 2014 (12 comments)

Show HN: Earthquakes on Leaflet, Crossfilter and D3 - https://news.ycombinator.com/item?id=5157054 - Feb 2013 (7 comments)

Leaftlet - A Lightweight JavaScript Library for Interactive Maps - https://news.ycombinator.com/item?id=2746178 - July 2011 (21 comments)