JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" id="minus" value="-">
<input type="number" min="0" max="9" step=1 id="counter">
<input type="button" id="plus" value="+">

JavaScript

minus.addEventListener('click', () => +counter.value--);
plus.addEventListener('click', () => +counter.value++);