JSFiddle - React, Tailwind, and code Playground
HTML
<!-- <form>
<input type="text" value="0"/>
<input type="button" id="number" onclick="incrementValue()" value="0" />
</form> -->
<input type="button" id="number" onclick="incrementValue()" value='0'/>
JavaScript
function incrementValue()
{
var value =Number(document.getElementById('number').value) + 1;
//value = isNaN(value) ? 0 : value;
//value++;
document.getElementById('number').value = value;
}