JSFiddle - React, Tailwind, and code Playground

JavaScript

function update() {
  var jqXHR = $.ajax({
    type: "POST",
    url: "/echo/json/",
    data: {
      json: '{"abc":"123"}'
    },
    dataType: 'json',
    success: successHandler

  });

  function successHandler(result) {
    data = result;
    console.log(data)
  }
}

$(document).ready(update);