react-map-gl is a TypeScript React component library that wraps Mapbox GL JS and MapLibre GL JS behind a declarative, reactive API. It does not render maps itself; instead it owns the lifecycle of native map instances and exposes components (Map, Marker, Popup, Source, Layer), controls such as NavigationControl and GeolocateControl, and hooks (useMap, useControl, MapProvider) that synchronize React props with the imperative map engine. The package is structured as a monorepo: a main aggregator package re-exports two per-backend packages, @vis.gl/react-mapbox and @vis.gl/react-maplibre, plus a legacy Mapbox adapter. The current line is an alpha rewrite (v8.1.0-alpha.2) focused on performance, full typing, and 1:1 prop mapping with the native map libraries.
This repository provides a tool for generating glyph packs (PBF files) from font files for use in vector tile maps, particularly Mapbox GL styles. It processes font directories, optionally combining multiple font files into a single font stack via a `fonts.json` configuration, and generates glyph data for the Unicode range 0-65535 in 256-point chunks. The core logic resides in `generate.js`, which uses the `fontnik` library to read font files and generate glyph outlines, and `@mapbox/glyph-pbf-composite` to combine glyphs from multiple fonts into a single PBF file per range. The output is placed in a `_output` directory with a hierarchical structure matching the font stack and Unicode ranges.