Emacs Tree-sitter custom highlighting

Thursday, February 27, 2025 A few years ago I blogged about custom tree-sitter-based syntax highlighting in emacs. I started out with highlighting certain keywords in red. I wanted to show the keywords that interrupt control flow: Screenshot showing syntax highlighting of keywords in black or red I highlight regular keywords ( while , if ) in bold. I highlight control flow interrupting keywords ( return , continue ) in red. That's syntax highlighting. But I also wanted to highlight names based on their meaning. In some projects I'm working with horizontal and vertical measurements, and I thought it would be nice to highlight those variable names differently. In some projects I'm working with Delaunay+Voronoi meshes, and I wanted to highlight the triangles, edges, and polygons differently. In some projects I'm working with hexagonal grids, and I wanted to highlight the three axes differently, like I do in my guide to hexagonal grids. In some projects I am working with html+js mixe ... Read full article.