Learning ServiceNow

onChange

onChange Client Scripts execute whenever a particular selected field's value is modified. Additionally, when the form first loads, this technically constitutes a change event, insofar as it triggers onChange scripts. However, by default, onChange Client Scripts include a condition block which returns to halt execution of the rest of the script if the variable isLoading is true (meaning that the change is the result of the form loading, not of a manual change.

By simply removing the isLoading condition, we can cause an onChange script to execute as though it were an onLoad script as well as onChange.

There's another condition under ...