This adds the QuickJS engine to ReactUnity. The C# binding is a fork of unity-jsb; the engine underneath it is quickjs-ng, which is a different engine from the Bellard-era QuickJS unity-jsb bound rather than a newer version of it.
The reason that matters to you: ng's asynchronous module loader means an import of an http URL, and so a dynamic import(), resolves without blocking a frame. EngineCapabilities.ModuleResolution is how you ask whether the engine in front of you can do that, and this one answers yes on every platform.
WebGL included, though it gets there differently: there is no QuickJS in a WebGL build, so a graph is fetched by the same loader the other platforms use and then handed to the browser to link and evaluate. Two things follow from that. Circular imports are refused rather than resolved — you get an error naming the cycle. And the page has to allow unsafe-eval and blob: scripts, which is the default and was already true of eval before modules.
Native binaries for all eleven other targets are built from source in the monorepo (native/quickjs) rather than shipped as prebuilts.
Install via OpenUPM (recommended)
npx openupm-cli add com.reactunity.quickjs
Or add using the package manager with the git URL
https://github.com/ReactUnity/core.git#upm/quickjs
The sources live in the ReactUnity/core monorepo under unity/quickjs, but every release is published to the upm/quickjs branch with the package at its root, so this fetches only this package. Pin a version with its tag instead:
https://github.com/ReactUnity/core.git#upm/quickjs/v0.23.0
The standalone ReactUnity/quickjs repository is frozen at 0.19.0 — update the URL if your project still points there.