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                Put your RSS feed in here. If it works, then it'll show stuff.
<div class="testing-block">
<input id="url"></input>
<button id="test">Test it</button>
<ul id="tester"></ul>




                //modified from
//using php proxy to deal with CORS from
let testButton = document.querySelector('#test');

testButton.addEventListener('click', runTest);

function runTest(){
  let rssUrl = document.querySelector('#url').value;

function testTheUrl(rssUrl){
    var list = document.querySelector('#tester');
   url: "",
   type: "POST", //endpoint request type
   crossDomain: true,
   //set request header here if needed by endpoint
   data: {
       "cors": rssUrl, //endpoint URL
       "method": "POST", // should be the same with endpoint request type
   success: function (data) {
       let xml = new window.DOMParser().parseFromString(data, "text/xml");
     let items = ''
     if(xml.querySelectorAll("item").length > 0){
        items = xml.querySelectorAll("item");//WORDPRESS maybe others
     else if(xml.querySelectorAll("entry").length > 0){
        items = xml.querySelectorAll("entry");//YOUTUBE
    let html = ``;
    items.forEach(el => {
      html += `
            <a href="${el.querySelector("link").innerHTML}" target="_blank" rel="noopener">
       console.log( html)
     list.innerHTML = html;