JSFiddle - React, Tailwind, and code Playground

HTML

<pre></pre>

JavaScript

$().ready(function() {
  
  function handleBeforeSend(args, jqxhr, settings) {
    console.log(args, jqxhr, settings);
    if (args.hasOwnProperty("additionalSettings")) {
      $("pre").text(JSON.stringify(args.additionalSettings))
    }
  }

  $.ajax({
    url:"/echo/html/",
    type: "POST",
    beforeSend: handleBeforeSend.bind(null, {additionalSettings:[0,1,2]})
  })
})