JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE html>
<html>
<body>
<form>
<select id="mySelect" size="8">
</select>
</form>
<br>
<p>Click the button to add a "Kiwi" option at the end of the dropdown list.</p>
<button type="button" onclick="myFunction()">Insert option</button>
<script>
function myFunction()
{
var x = document.getElementById("mySelect");
var option = document.createElement("option");
option.text = "Kiwi";
x.add(option);
}
</script>
</body>
</html>