JSFiddle - React, Tailwind, and code Playground

HTML

<div class="col-xs-8">
        <div style="display:inline-block">
            <h3>Bank accounts &nbsp;&nbsp;</h3>
        </div>
        <div style="display:inline-block">
            <button id="add_bank_acc_btn" type="button" class="btn btn-default glyphicon glyphicon-plus"> Add</button>
        </div>
<table id="bank_accs_tbl" class="table table-striped">
            <thead>
            <th>ID</th>
            <th>Bank type</th>
            <th>Label</th>
            <th>Currency</th>
            <th>Min. transfer</th>
            <th>Approved</th>
            <th></th>
            </thead>
            </table>
   </div>
</div>

JavaScript

$(document).ready(function () {
    window.can_add_bank_row = true;
    $('#add_bank_acc_btn').on('click', function () {
        addBankAccRow();
    });

});

/**
 *  Adds a table row with fields to add a bank account to the merchant's profile.
 */
function addBankAccRow() {
    if (window.can_add_bank_row) {
        var warning_msg = "You are about to add a new bank account for this merchant.\n\nAre you sure?";
        $('<tr>' +
            '<form method="POST" onsubmit=\"return confirm(\'' + warning_msg + '\');\">' +
            '<td></td>' +
            '<td><select id="bank_type_dropdown">' +
            '<option value="international">International</option>' +
            '<option value="sepa">SEPA</option>' +
            '<option value="interac">Interac</option>' +
            '<option value="paypal">PayPal</option>' +
            '</select></td>' +
            '<td><input name="add_bank_label_input" type="text"></td>' +
            '<td><input name="add_bank_currency_input" type="text" style="width: 50px;"></td>' +
            '<td><input name="add_bank_min_transfer_input" type="text" style="width: 80px;"></td>' +
            '<td><input type="checkbox" name="add_bank_default" value="0"></td>' +
            '<td><input type="checkbox" name="add_bank_approved" value="0"></td>' +
            '<td><button type="submit" class="btn btn-primary">Add</button></td>' +
            '</form>' +
            '</tr>').insertBefore('#bank_accs_tbl > tbody > tr:first');
        window.can_add_bank_row = false;
    } else {
        alert('You\'ve got one empty row to add a bank account already.\nPlease, fill and submit it before adding a new one. :)');
    }
}