linebreak-web This is purely experimental! About This is a playground for boxes and glue's line breaking algorithm. I'd like to have a visual test for the line breaking algorithm of boxes and glue, so I render the result to an HTML canvas. There will be more bells and whistles following, but I need a first commit, so here it is. Running / compiling You need a Go compiler # build GOARCH=wasm GOOS=js go build -o linebreak.wasm # serve: python3 -m http.server # open localhost:8000 and then open index.html Technique I use a small Go layer to the boxes and glue library (also written in Go) and compile it to Web Assembly (wasm) . There is a small JavaScript interface to the Web Assembly program. Thanks Many thanks to Didier Verna for etap that inspired me to create this. etap is far (yes far!) more advanced.