JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<iframe src="https://www.google.com">Google</iframe>
<form name="formId" id="formId" action="ajax/submitForm.php" method="post" target="_blank">
    <input type="text" name="x" />
   <input type="button" id="submit_button" value="GO" />
</form>

<iframe style="border:none;width:0px;height:0px" id="iframe_submit" name="iframe_submit"></iframe>

JavaScript

function ftformSubmit() {
  $('#formId').submit();
}
$(function(){
    $('#submit_button').click(function(){
        $('#formId').submit();
        
    });
})