Which native Node.js modules are compatible with WebContainers?

StackBlitz WebContainers implement a Node.js runtime entirely within the browser using WebAssembly and a virtualized file system. This architecture allows for local execution of npm packages and dev servers without a remote backend.

Because the environment relies on WebAssembly and browser-based memory mapping, there is a known limitation regarding native C++ modules that cannot be compiled to WebAssembly. However, the specific boundary between supported built-in Node.js modules and those that require native binaries is not always explicit for complex dependencies.

What is the definitive criteria for determining if a specific Node.js native module will function within a WebContainer? Does the runtime provide a mechanism to identify unsupported native dependencies during the boot sequence?