To check if a Dynamics 365 field is empty, you can use:
if(Xrm.Page.getAttribute("fieldname").getValue() == null)
For example, if you wanted to check if the fax number field on the Account record is empty, first open the form and find the field name:
Get the field name:
Now if we add the following script to the loading of the account form:
function AccountOnLoad() { if(Xrm.Page.getAttribute("fax").getValue() == null) { alert("Fax is empty"); } }
If the fax field is empty, it will display:
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