Example: I have a field called applicantName which is my form element ID and I want this to be ready only on form initialisation (Under initialisation script in guideRootPanel).
For some reason, I couldn't find enough information on this in JS API document. Thanks!
You could use enabled property of the field component and set it to false in initialize expression. Though, there is no such property at panel level at the moment and you need to set the enabled to false for each field of that panel.