Web playground

対象実装: このドキュメントは現行 Web Playground（Bootstrap 実装）について記述する。NEPLg2.1 の正の仕様は doc/2.1spec/ を参照。

The web playground lives under web/ and is built by Trunk (Trunk.toml targets
web/index.html).

Local development

  • Run trunk serve and open http://127.0.0.1:8080/.
  • The embedded editor is optional. If web/vendor/editorsample is missing, the fallback textarea is used.
  • GitHub Pages builds pass --public-url /NEPL-g2/ so the published site resolves assets under that prefix.
  • If you set --public-url to a subpath (e.g. /web/dist/), trunk serve will also expect that base path. Open http://127.0.0.1:8080/web/dist/ or pass --serve-base / --ws-base / to serve from root while keeping asset URLs under the subpath.

Terminal features

The embedded terminal can:

  • run: compile the current editor source to WASM and execute it in the browser.
  • test: compile and execute stdlib tests (from stdlib/tests).
  • clear: clear terminal output.

WAT generation is provided by the "WATを生成" button in the editor panel.

Standard input is provided via the terminal stdin textarea. Output is captured
from WASI fd_write and rendered in the terminal pane.

Notes

  • The compiler runs in WebAssembly and uses an in-memory stdlib source map.
  • Diagnostics are rendered as text with line/column information.
  • The terminal is a browser-only convenience; it does not execute cargo commands.
  • Only stdlib imports are available in the browser; local file imports are not supported yet.
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