Issues with RSS info not displaying-CodePudding

Long story short: I want for a rss feed by the UN to show on my sidebar after I click to open it. Javascript & rss.xml are external files Desired result: Clicking rss button displays news on the side bar. Issues from the console :

XHRGEThttp://localhost/Dynamic static content Test/rss.xml

Uncaught TypeError: request.responseXML is null
showFeed http://localhost/Dynamic static content Test/Javascript.js:18
xmlLoad http://localhost/Dynamic static content Test/Javascript.js:12
onload http://localhost/Dynamic static content Test/:1

Javascript:

var docname = "rss.xml"
var doctype = "unkown"
function xmlLoad(){
    try{
      if(window.ActiveXObject){
        request= new ActiveXObject("Microsoft.XMLHTTP");
      } else{
        request = new window.XMLHttpRequest();
      }
      request.open("GET",docname,true);
      request.send(null);
      request.onreadystatechange = showFeed;
    } catch (exc){
      alert ("An error has ocurred"   exc.message);
    }
  }
  function showFeed(){
    xmlDoc = request.responseXML.documentElement;
    var maxitems = 3
    var feedBody = ""
    var titlelist = xmlDoc.getElementsByTagname("title");
    var linklist = xmlDoc.getElementsByTagname("link");
    var browsername = navigator;
    for (i = 0; i<maxitems; i  ){
      feedBody = feedBody   "<a href='" linklist[i].firstChild.nodeValue "'>" titlelist[i]
    }
    document.getElementById("info").innerHTML = "Browser: "   browsername   "Doc type: "   document.getElementById("feedarea").innerHTML== feedBody;
  }```

CodePudding user response：

You call showFeed every time the ready state changes (when there is a readystatechange event), and you have no checks inside it to make sure that either:

The state has changed to "Done"
There wasn't an error

Use the load event instead.