JSFiddle - React, Tailwind, and code Playground

by Lalji Tadhani

HTML

<select class="mySelect" required>
    <option value="">0</option>
    <option value="1">1</option>
</select>

CSS

.mySelect { font-size: 2em; color:green }
.mySelect option { color: green; }
.mySelect option[value=""] { color: red; }
.mySelect:invalid { color: red; }