la-visitor/assets/container.js

const container = (name, customisation = null) => {
    if (typeof(name) !== "string") {
        throw new TypeError("Name of the container must be string.");
    }

    if (customisation !== null && typeof(customisation) !== "function") {
        throw new TypeError("Customisation must be null or function.");
    }

    const target = document.createElement("div");

    target.classList.add("container");
    target.id = "container-" + name;

    if (customisation) {
        customisation(target);
    }

    return target;
};

export { container };