JSFiddle - React, Tailwind, and code Playground

JavaScript

var mywindow = window.open();
testArray = [1, 2, 3];

var myUrl = "/echo/json/";
$.ajax({
    type: "POST",
    url: myUrl,
    dataType: "json",
    data: {
        json: JSON.stringify({
            images: testArray
        })
    },
    success: function (data) {
        console.log('success');
        //alert(data);
        mywindow.document.body.innerHTML = '<pre>' + data.images + '</pre>';
    }
});