Hi,
If it's *completely unavoidable*, you can make the call synchronous.
See the options page[1] for details. Making the call synchronous will
lock up the UI of most browsers during the processing of the call.
So:
* * * *
function getResult() {
var result;
// Default to a failure
result = (your failure return value here);
// Do the request synchronously
new Ajax.Request(url, {
// Lock up the browser until this completes
asynchronous: false,
// On success, set our local variable to the result from the
response
onSuccess: function(resp) {
result = resp.responseJSON.result;
},
// Report failures and exceptions
onFailure: function() {
reportError('Request failed');
},
onException: function(req, ex) {
reportError('Error: ' + ex);
}
});
// Done
return result;
}
* * * *
(The above assumes your request returns JSON.)
But again, if you can possibly avoid it...
[1] http://prototypejs.org/api/ajax/options
HTH,
--
T.J. Crowder
tj / crowder software / com
Independent Software Engineer, consulting services available
On Jan 21, 6:04 pm, bigyellow <[email protected]> wrote:
> I read through the response in October from bluezehn regarding this
> subject but couldn't quite make sense of it. Here's the deal. I've set
> an image to draggable and set revert equal to the result of a
> function. If the function returns true, the image snaps back,
> otherwise it doesn't. This works with no problem. However, in reality
> I would like the function to make an ajax call and return true or
> false depending on the results of that ajax call. Bottom line, I've
> created an ajax chess game and right now you have to click where the
> piece is and click where you want it to go. It works, but I'd prefer
> drag and drop functionality.
>
> I understand the asynchronous nature of javascript, but how do I have
> an ajax call actually return a value to another calling function?
> Thanks in advance for any help you can give.
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