JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.cdnjs.com/ajax/libs/json2/20110223/json2.js"></script>
<input type="text" id="link" value="foo"/>

JavaScript

var postData = {   'url' : $("#link").val(),   'test' : 'testtest'  };
var v=$(postData).serialize();
var jsonString = JSON.stringify(postData );  

console.log(jsonString);
$("body").append(jsonString);