• Choose Custom Properties from the left panel of the Zoho Developer console, under Build. Click Write Script associated and available next to your CRM variable. 

• Write the code logic in the custom function Deluge script editor and click Save. You can fetch the old and new value of CRM variable and perform the functionality using that in the function. 

➤ The syntax for getting the old value of the custom variable is:

<oldvalue> = input.variableMap.get("oldvalue");

 

➤ The syntax for getting the new value of the custom variable is:

<newvalue> = input.variableMap.get("newvalue");

 

• When the extension is published and installed in the Zoho CRM account, whenever the value of the CRM variable changes, the script of field value change is triggered and its functionality occurs.