The Scala.js standard library from the scala-wasm fork (io.github.scala-wasm:scalajs-library_2.13), redistributed with Proscala's scala.scalajs.wit API spliced in and the scala/scalajs/wasi facades removed (they ship in scalajs-scalalib_2.13 instead, so that they have a single provenance). Original work by the Scala.js authors and the scala-wasm project, under the Apache License 2.0.