JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <form id=max name='cingcing' action='lanjut.php' method='POST'>
    <center>

        <table>
        <tr>
            <td colspan=2> <center> id </center> </td>
        </tr>
        <tr>
            <td> id number </td> <td> <input type="password" id='idnya' name='idnya2'> </td> 
        </tr>
    </center>
    </form>
</body>

JavaScript

$("#idnya").keyup(function()
        {
            if($(this).val().length ==15){
            $("#max").submit()
        }
    });