Uncaught Error: InvalidStateError: DOM Exception 11 with AJAX?
The error:
Uncaught Error: InvalidStateError: DOM Exception 11Means you are asking for status in the wrong state. conn.status is not available during readyState of 0 or 1.
Your problem is you are using conn.status when the readyState is 0 and 1.
You need to add code to make sure conn.status is not queried in the inappropriate states, like this:
if(conn.readyState === 4 && conn.status === 200){Then your code will only query conn.status at the appropriate time.
Ref:
Try this:
conn.open('GET','includes/feedExtra.php?num=' + num, false);false makes the request synchronous, true / default is asynchronous.
In your case, it's defaulting to true, which means the properties in your conditional (conn.status === 200 && conn.readyState === 4) aren't available yet. They will be until after the call.
Hopefully that helps you some.
Also, checkout this discussion here.