Credits
Standing on other people's work.
Each entry below was checked against the package metadata or the repository license, not written from memory.
-
QuickJS, the JavaScript engine inside the sandbox. Copyright Fabrice
Bellard and Charlie Gordon, MIT. Version 2025-09-13, used through the
@jitl/quickjs-wasmfile-release-syncbuild.
github.com/bellard/quickjs -
quickjs-emscripten, the WebAssembly bindings and the handle lifetime
API that make QuickJS usable from a Worker. Jake Teton-Landis, MIT, version 0.32.0.
github.com/justjake/quickjs-emscripten -
esm.sh, the bundler and CDN that turns an npm package into one ESM
file. The esm-dev project, MIT.
github.com/esm-dev/esm.sh -
Cloudflare Workers, the runtime, the static asset hosting and the
cache API. Cloudflare, Inc.
developers.cloudflare.com/workers -
lodash, used in the examples and in the smoke test as a real,
non-trivial package. John-David Dalton and contributors, MIT, version 4.18.1.
lodash.com -
Wrangler, the build and deploy tool. Cloudflare, Inc., MIT and
Apache 2.0.
github.com/cloudflare/workers-sdk
Things this site does not use
No analytics, no tracking pixels, no external fonts, no JavaScript CDN, no cookie banner. The page loads one stylesheet and one small script from its own origin. There is nothing to consent to.
Type
Set in the system serif and system sans stacks, with monospace for code. No webfont is downloaded, which keeps the page fast and the typography honest on every platform.