JSFiddle - React, Tailwind, and code Playground

HTML

<form id="login" action="/echo/html/" method="post">
    <input type="text" name="html" value="test"/>
        <input type="submit" />
</form>
<div id="log"></div>

JavaScript

$("#login").submit(function (e) {
    if($(this).attr("data-checked") == "1") {
          return true;
    }
    $('#log').append($("<p>checking....</p>"));
    setTimeout(function() {
        // JUST WANT TO SUBMIT THE FORM HERE
        $("#login").attr("data-checked","1");
        $("#login").submit()            
    },2000);

    e.preventDefault();
});