Where is L defined in LeafletJs?

Question

I'm looking inside LeafletJs source code and I cannot find where L is defined nor exported. L is referred many times and main functions are called against it.

So where is L defined ? What is its nature (object, prototype) ?

A little bit of context : I'm trying to use leaflet with reasonml so I need bucklescript bindings to leaflet and for that I must understand how leaflet is designed. I'm aware of bs-leaflet library but it hasn't show any activity in 2 years.

Answer 1

Leaflet's source code have classes/prototypes/objects.

There's no L though. If you look at leaflet's src code, It's exported default. Not by name.

The reason why we type in our code something like this:

import L from 'Leaflet'

is because it's a common approach to name that L. That's what Leaflet recommends and states in their docs.

Edit:

Look into node_modules/leaflet/Leaflet.js . Everything gets imported without names, so when you import L, it has Map, geometry and other objects already in it.