JSFiddle - React, Tailwind, and code Playground

by Avinash_R

HTML

<select name="q">
    <option value="a">A</option>
    <option value="b">B</option>
</select>
<select name="q">
    <option value="a">A</option>
    <option value="b">B</option>
</select>

JavaScript

$("[name=q]").attr("defaultValue", "b");
alert($("[name=q]").val());
alert($("[name=q]").attr("defaultValue"));