JSFiddle - React, Tailwind, and code Playground

HTML

<form id="content-add-form" role="form" name="content-add-form" enctype="multipart/form-data">
    <input type="text" name="foo" value="foo"/>    
<form>

JavaScript

var formData = new FormData($('#content-add-form')[0]);


var xhr = new XMLHttpRequest;
xhr.open('POST', '/');
xhr.send(formData);