Node.js private method bug

Question

I faced a strange problem in my Node.js project. I have a class and need to hide some of his methods. MDN says that i need to put # at the beginning of the method name. And this is not valid. I have 13.6 Node version: Here's my code:

module.exports.class = class ExtendedEmbed extends MessageEmbed {
    static #validateColors(colors) {
        // Do something;
    }

    static #validateTemplates() {
        // Do something...
    }
    
    // Other methods...

    /**
     * @param {String} color 
     * @param {String} template 
     * @param {import('discord.js').MessageEmbedOptions} data 
     * @param {import('./index').ExtendedEmbedOptions} options 
     */
    constructor(color, template, data = {}, options = {}) {
        console.log(ExtendedEmbed.#validateColors(options.colors);
    }
}

Here's the error:

C:\Projects\EmbedUtilities\src\ExtendedEmbed.js:4
    static #validateColors(colors) {
                          ^

SyntaxError: Unexpected token '('

Answer 1

What about using a private method instead of the static once?

    private validateTemplates() {
        // Do something...
    }