JSFiddle - React, Tailwind, and code Playground

HTML

<select name="store-cost" class="target">
    <option value = '100'>100</option>
    <option value = '500'>500</option>
    <option value = '1500'>1500</option>
</select>
<a href="#" onclick = "donateNow($('.target').val())">Donate</a>

JavaScript

function donateNow(currValue)
{
    alert('you donated: '+ currValue);
}