JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">


</script>
<div>
    <form id='form_7' action="" method='POST'>
        <input type='text'>
    </form>
</div>

<button class='item' rel='7'>BotĂŁo</button>

JavaScript

$(document).ready(function() {
    $('.item').click(function() {
        var id = $(this).attr('rel');
        var form = $("#form_" + id);
        form.submit();
    });
});