la-visitor/scripts/loader.js

import { mode_selector } from "selector/mode-selector.js";
import { color_mode } from "settings/color-mode.js";

document.addEventListener("DOMContentLoaded", () => {
    const app = document.querySelector(".app");

    const color_setting = new color_mode(app);
    color_setting.update();

    const selector = new mode_selector(app);
    selector.show();
});