onchange catalog client script not firing

[HugoFirst]

I have an application catalog item which has an onchange catalog client script.

The problem is that the onchange catalog client script won't execute, even when I change the value in the variable on the form.

I've boiled it down to a simple alert for testing:

function onChange(control, oldValue, newValue, isLoading) {

  alert("huha!");

    if (isLoading || newValue == '') {

          return;

    }

    //Type appropriate comment here, and begin script below

}

Here's the catalog client script:

Whenever I change the value of the variable data_center, I expect to get an alert saying "huha!".   But I get nothing.

I don't think the script is executing.   I turned on the Javascript debugger, but I'm not seeing any reference to this script.

Any ideas?

Thanks in advance for any light on this for me.   I look forward to hearing from y'all!

[Brad Tilton · Accepted solution]

Usually when I see a client script or ui policy not executing it's because there is a client script on the same table or item/variable set with an error. I would take a look at your javascript console and see if there are any errors on the page. Once a client script throws an error, none of the subsequent client scripts or ui policies will run.

[HugoFirst]

Ding! Ding! Ding! DIng!

Thank you Brad! You are right, you are absolutely correct!

The issue was another catalog client script which took an error and prevented all other scripts from firing.

I deactivated the the other client scripts and reran.   My script ran.

Then I reactivated them one by one until I found the problem script.

The problem script was onLoad script to display the help text for several variables.

As part of my changes to the form I had removed the help text for one variable which was no longer needed.

I did attempt to debug using the Javascript console, but I'm clearly in need of some training there.

Thanks again for you advice Brad!   I think you set a new speed record for the correct answer!

[Chris Reynolds]

Hey Brad - I was running into an odd issue on one of our catalog items.   I stumbled across your tidbit and it pointed me in the right direction.   Thanks for sharing this info!