JSFiddle - React, Tailwind, and code Playground

HTML

<form action="" id="form-1">
  <input type="text" name="name" placeholder="name..">
  <input type="text" name="descript" placeholder="descript..">
  <input type="submit">
</form>

JavaScript

$("#form-1").submit(function() {
	var req = $(this).serialize();
  
  console.log(req);
  
  req += "&name=form-1&value=first";
  
	console.log(req);
  
  $.ajax({
    type: "POST",
    url: "mail.php",
    data: req
  })
});