WASI

Attempt to initialize instance as a WASI reactor by invoking its _initialize() export, if it is present. If instance contains a _start() export, then an exception is thrown.

start() requires that instance exports a WebAssembly.Memory named memory. If instance does not have a memory export an exception is thrown.

If initialize() is called more than once, an exception is thrown.

Attempt to begin execution of instance by invoking its _start() export. If instance does not contain a _start() export, then start() attempts to invoke the __wasi_unstable_reactor_start() export. If neither of those exports is present on instance, then start() does nothing.

start() requires that instance exports a WebAssembly.Memory named memory. If instance does not have a memory export an exception is thrown.

If start() is called more than once, an exception is thrown.

Is an object that implements the WASI system call API. This object should be passed as the wasi_snapshot_preview1 import during the instantiation of a WebAssembly.Instance.