Attribute Macro neon::main

#[main]

Marks a method as the main entrypoint for initialization in a Neon module. This attribute should only be used once in a module and will be called each time the module is initialized in a context.

#[neon::main]
fn my_module(mut cx: ModuleContext) -> NeonResult<()> {
    let version = cx.string("1.0.0");
 
    cx.export_value("version", version)?;
 
    Ok(())
}

If multiple functions are marked with #[neon::main], there may be a compile error:

error: symbol `napi_register_module_v1` is already defined