[gavinray]

The best example of WASM being used to render to canvas (it's also visualizations) I've seen is "Perspective":

https://perspective.finos.org/

  "Perspective is an interactive analytics and data visualization component, which is especially well-suited for large and/or streaming datasets. Originally developed at J.P. Morgan and open-sourced through the Fintech Open Source Foundation (FINOS), Perspective makes it simple to build user-configurable analytics entirely in the browser, or in concert with Python and/or Jupyterlab. Use it to create reports, dashboards, notebooks and applications, with static data or streaming updates via Apache Arrow."

  "A fast, memory efficient streaming query engine, written in C++ and compiled for both WebAssembly and Python. read/write/streaming for Apache Arrow, and a high-performance columnar expression language based on ExprTK."

[antman]

Firefox on iphone, buttons on perspective are not clickable.