JSFiddle - React, Tailwind, and code Playground

by Shishir Max

HTML

<body>
    <script type="text/javascript">
       function sumar(){
           document.getElementById("numero").value = parseInt(document.getElementById("numero").value)+10;
       }

       function inicializar(){
           document.getElementById("numero").value=121212121;
       }
    </script>

    <form name="formNum">
        <p>
            <input type="text" size="10" name="numero" id="numero" value="0" />
        </p>

        <p>
            <input type="button" value="Sumar" onclick="sumar()" />
            <input type="button" value="Iniciar a 0" onclick="inicializar()" />
        </p>
     </form>
</body>