Canvas Form Event Constants (CFEC)
CFEC is a global registry introduced in CT 18.1 to help you access the list of form specific events through constants.
Use CFEC to call a form event as shown in the following code:
this.fm.registerHandler(CFEC.CLICK, '<FORM_BUTTON/HYPERLINK_ID>', function(fm, event,fieldName) { //Developer to perform operations here. });