I have written an action in Zoho CRM that triggers on record update to update information in Zoho Projects. The issue I am having is that the script is a few thousand lines at this point and is very difficult to maintain. Is there a way I can create a function that I can use in an action that is maintained elsewhere. For instance:

// Function to create project tasklist

if(x = y){

      customfunction(x);

}

instead of putting all the code for the custom function in the if statement.