Incident Category field cannot be set read only in an onLoad client script without having it inside a setTimeout() function - Known Error

Incident Category field cannot be set read only in an onLoad client script without having it inside a setTimeout() function Description Incident Category field cannot be set read only in an onLoad client script without having it inside a setTimeout() function

Steps to Reproduce

1. Create a client script with the following code: function onLoad() { g_form.setReadonly('category', true); /* UNCOMMENT THESE LINES var setTimer = ''; setTimer = setTimeout(setTimerDelay, ''); //set the delay for setReadOnly to work, it's the only way currently function setTimerDelay() { g_form.setReadonly('category', true); } */ } 2. Navigate to incident.do and notice that the category does not become readonly during onLoad. 3. If you comment the second line and uncomment the lines on the multi-line comment, then the category field seems to become read-only

I have tested this in Paris, Quebec, Rome and San Diego and the behaviour seems to be consistent.

Workaround In an onload Client Script, for an affected field, put the g_form.setReadOnly API call in a timeout. e.g.,

setTimeout(function() { g_form.setReadonly('category', true); }, 0);