When I try to call a javascript function from rust. It does not work

[kiyingitimo]

This is my js code

import { createApp } from 'vue'
import App from './App.vue'

function on_init() {
    console.log("Ready")
}


register_plugin = function (importObject) {
    importObject.env.perform_demo = function () {
        console.log("Called from rust")
    };
}

miniquad_add_plugin({ register_plugin, on_init });

createApp(App).mount('#app')

It's supposed to register a function to be called by Rust later on in this code

extern "C" {
    fn perform_demo();
}

#[macroquad::main("Coder")]
async fn main() {
    unsafe {
        perform_demo();
    }

It continues to give this in the console