I have come up with this list of categories and keywords by which the products should be categorised. You may check it below:

const categories = {
    "Meso": ["snicla", "šnicla", "krmenadla", "pileca prsa", "belo meso", "pileća prsa", "krilca"],
    "Čokolada": ["čokolada", "cokolada"],
    "Majonez": ["majonez"],
    "Kečap": ["kečap", "kecap"],
    "Senf": ["senf"],
    "Paradajz": ["paradajz"],
    "Kobasice": ["kobasica"],
    "Posebne kobasice / Salame": ["posebna kobasica", "pileca posebna", "salama"],
    "Pileća prsa": ["pileća prsa", "pileca prsa"],
    "Pašteta": ["pašteta", "pasteta"],
    "Ćevapi": ["ćevapi", "cevapi", "ćevapčići"],
    "Šnicla": ["šnicla"],
    "Krilca": ["krilca"],
    "Voće": ["banana", "banane", "jabuka", "jabuke", "mandarine"],
    "Sokovi": ["borovnica", "borovnice", "jabuka", "jabuke", "narandža", "pomorandže", "breskva", "breskve"],
    "Kuhinjski aparati": ["Ketler za vodu", "Seckalica MC 400"],
    "Za domaćice": ["daska za peglanje", "bokal", "čistač", "cistac",],
    "Vileda": ["vileda"],
    "Filtriranje vode": ["Akvafor", "Akvaphor"],
    "Alati": ["metla", "auto set"],
    "Maziva": ["majonez", "kečap", "kecap", "senf", "sos"]
};

Now, what I need is to exclude certain keywords from some categories. For example, I have a category “Voće” (eng. fruit) and inside of that category I want to have a “banana” keyword included, but I don’t want to have “choco banana” or “krem banana” included in that category (since it isn’t a fruit but a candy). The solution I’ve tried you may find below:

// Function to filter products based on exclusion rules
function filterProducts(category, exclusions) {
    return categories[category].filter(product => {
        let lowerCaseProduct = product.toLowerCase();
        // Check if product does not include any exclusion keyword
        return !exclusions.some(exclusion => lowerCaseProduct.includes(exclusion));
    });
}

// Example usage: Exclude "Krem banana" from the "Voće" category if found as a keyword
let excludedKeywords = ["krem banana"];
categories["Voće"] = filterProducts("Voće", excludedKeywords);

console.log(categories["Voće"]);

Unfortunately, I couldn’t manage to get the desired result with this piece of code.