How to check if Ajax response data is blank?
I have jQuery AJAX function that returns HTML after querying a database. Depending on the result of the query, the function will either return HTML code or nothing (i.e. blank) as desired. I need to conditionally check for when the data is blank.
Why is Ajax returning HTTP status code 0?
It could be possible to get a status code of 0 if you have sent an AJAX call and a refresh of the browser was triggered before getting the AJAX response. The AJAX call will be cancelled and you will get this status. In my experience, you’ll see a status of 0 when:
Can a AJAX call fail if there is no WWW?
It is important to note, that ajax calls can fail even within a session which is defined by a cookie with a certain domain prefixed with www. When you then call your php script e.g. without the www. prefix in the url, the call will fail and viceversa, too.
When to echo something before executing die in WP Ajax?
You should echo something before executing die. This will prevent server errors, and will help when debugging. This is the answer to the WP AJAX 0 problem. Actually, if you just add die() without echoing something out, this will also give you a 500 Internal Server Error, and return 0 for wp-admin/admin-ajax.php.
When to use the return function in jQuery?
It is not used anywhere: it is ‘return’ for anonymous function, called on success callback– RegentApr 15 ’14 at 8:48 Stop trying to return from an asynchronousfunction. Handle the data in the callback function and in functions you can from it.
Do you see there return true or false in jQuery?
20.9k44 gold badges4444 silver badges5757 bronze badges asked Apr 15 ’14 at 8:43 LinesofcodeLinesofcode 4,24199 gold badges4747 silver badges8989 bronze badges 4 You don’t have return in validateUserDetails function… So nothing is returned– RegentApr 15 ’14 at 8:45 I don’t have? don’t you see there return trueOrFalse(bool)?