JSFiddle - React, Tailwind, and code Playground

HTML

<select id="marki">
    <option value="alfa">Alfa Romeo</option>
    <option value="audi">Audi</option>
</select>

<select id="modele">
    <option value="147" class="alfa">147</option>
    <option value="155" class="alfa">155</option>
    <option value="166" class="alfa">166</option>
    <!-- Opcje dodawane przez jQuery
    <option value="A4" class="audi">A4</option>
    <option value="A6" class="audi">A6</option>
    <option value="A8" class="audi">A8</option> 
    -->
</select>

JavaScript

$('#marki').change(function() {
        switch( $(this).val() ) {
            case 'audi': 
                $(".alfa").remove();
                $("#modele").append("<option value=\"A4\" class=\"audi\">A4</option><option value=\"A6\" class=\"audi\">A6</option><option value=\"A8\" class=\"audi\">A8</option>");
                break;
            case 'alfa':
                $(".audi").remove();
                $("#modele").append("<option value=\"147\" class=\"alfa\">147</option><option value=\"155\" class=\"alfa\">155</option><option value=\"166\" class=\"alfa\">166</option>");                
                break;
        }            
});