Javascript for loop different order -


can tell me why different order everytime code loops? i'm new javscript , know code isn't neat.

<html> <body> <div id="status">  <br> </div> <script> loopthis()  function loopthis(){   document.getelementbyid("status").innerhtml = "status - name: <br>" var userlist = ["amd","danielfromsl","skyrimfus","tyler1","andymilonakis","omgchad","russ_money","h3h3productions"] var i, len;  (i = 0, len = userlist.length; < len; i++){  usercheck = userlist[i]    var xhttp = new xmlhttprequest();   xhttp.onreadystatechange = function() {     if (this.readystate == 4 && this.status == 200) {         jsondoc = this.responsetext;         last = jsondoc.split('"mature":')         last = last[1]         last = last.split(",")         isonline = last[0]         streamtitle = last[1].split('"status":')         streamtitle = streamtitle[1]         realuser = last[3].split('"display_name":')         realuser = realuser[1]         realuser = realuser.split('"')         realuser = realuser[1]         url = last[15].split('"url":')         url = url[1]         url = url.split('"')         url = url[1]      if (isonline == "true") {         //alert(realuser+" streaming! title:"+streamtitle)         document.getelementbyid("status").innerhtml += "<font color='0x00ff00'>online</font> - "+"<a href='"+url+"'>"+realuser+"</a><br>"       } else {          //alert(realuser+" offline!")         document.getelementbyid("status").innerhtml += "<font color='red'>offline</font> - "+realuser+"<br>"      }        }   };   xhttp.open("get", "https://api.twitch.tv/kraken/channels/"+usercheck+"?client_id=sky", true);   xhttp.send();  } }  setinterval(loopthis,5000); </script>  </body> </html>

you use loop loop through list of users in predefined order. inside loop make asynchronous xmlhttprequest , give function run when receive response request. function have attached xhttp.onreadystatechange event run when response received.

the responses can received in different order everytime script run , that's why different xhttp.onreadystatechange events fire in different order.


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