JSFiddle - React, Tailwind, and code Playground

HTML

<input type="hidden" id="field" name="field" value="1">      
<button id="change">Change</button>

JavaScript

alert($("#field").val());
$("#change").on("click", function(){
    var newValue = parseInt($("#field").val()) + 1;
   $("#field").val(newValue);
   alert($("#field").val());
});