Can any one explain the below code that i didn't understood?

Question

I don't understand the code below. Can someone please give me an explanation?

function deviceNameChange() {           
   if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    {
        var val=xmlHttp.responseText;

        var val1=val.split(',');

        for(var i=0;i<val1.length;i++)
        {
            if(document.getElementById("deviceName").value!=val1[i])
            {
              var anOption = document.createElement("OPTION");      
              document.getElementById("deviceName").options.add(anOption);
              anOption.value=val1[i];
              anOption.innerHTML=val1[i];
            }

        }
    }   
}

Yes exactly while i was working in some controller i had to see this javascript file — satish, Jul 16 '15 at 06:48
If you're just after how the *split* method works, then MDN is your best bet: [*MDN String.prototype.split()*](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split). — RobG, Jul 16 '15 at 06:52
Since I didn't know javascript i asked this question and thank you for all your replies. — satish, Jul 16 '15 at 06:54
BTW, [*option elements*](http://www.w3.org/html/wg/drafts/html/master/semantics.html#the-option-element) can't contain markup, so instead of `anOption.innerHTML=val1[i]` it would be better to have `anOption.text=val1[i]`. ;-) — RobG, Jul 16 '15 at 07:01

score 0 · Accepted Answer · edited May 23 '17 at 11:58

This is the return from a HTTP Request of for example

test.php

For more information:

HTTP GET request in JavaScript?

var val=xmlHttp.responseText;
             var val1=val.split(',');
         for(var i=0;i<val1.length;i++)
         {
             if(document.getElementById("deviceName").value!=val1[i])
             {

val is the data we got from the request. It must be a string with

,

because it will get splitted by this.

For more information:

https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/String/split

For every

i (i is the splitted argument)

in this string it will create an element and insert the value we got from request.

Thank you #Maurize your answer is helpful – satish Jul 16 '15 at 06:57 — satish, Jul 16 '15 at 06:57

Can any one explain the below code that i didn't understood?

1 Answers1