JSFiddle - React, Tailwind, and code Playground

HTML

<select id="select1" onchange="filterProductOptions()">
    <option value="1">Select1: 1</option>
    <option value="2">Select1: 2</option>
    <option value="3">Select1: 3</option>
    <option value="4">Select1: 4</option>
    <option value="5">Select1: 5</option>
</select>
<select id="select2">
    <option value="1">Select2: 1</option>
    <option value="2">Select2: 2</option>
    <option value="3">Select3: 3</option>
    <option value="4">Select4: 4</option>
    <option value="5">Select5: 5</option>
</select>

CSS

div {
    display:none;
}

JavaScript

function filterProductOptions () {
    alert("got here");
}