Johan Brandhorst-Satzkorn, Julien Fabre, Damian Gryski, Evan Phoenix, and Achille Roussel 13 September 2023 Go 1.21 adds a new port targeting the WASI preview 1 syscall API through the new GOOS value wasip1. This port builds on the existing WebAssembly port introduced in Go 1.11. What is WebAssembly? WebAssembly (Wasm) is a binary instruction format originally designed for the web. It represents a